7Baggers

Oil-Dri Corporation of America
(NYSE:ODC) 

ODC stock logo

Oil-Dri Corporation of America, together with its subsidiaries, develops, manufactures, and markets sorbent products in the United States and internationally. It operates in two segments, Retail and Wholesale Products Group; and Business to Business Products Group. The company provides agricultural ...

Founded: 1941
Full Time Employees: 803
Sector: Basic Materials
Industry: Specialty Chemicals

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Quarterly
Annual
    Unit: USD2026-04-30 2026-01-31 2025-10-31 2025-07-31 2025-04-30 2025-01-31 2024-10-31 2024-07-31 2024-04-30 2024-01-31 2023-10-31 2023-07-31 2023-04-30 2023-01-31 2022-10-31 2022-07-31 2022-04-30 2022-01-31 2021-10-31 2021-07-31 2021-04-30 2021-01-31 2020-10-31 2020-07-31 2020-04-30 2020-01-31 2019-10-31 2019-07-31 2019-04-30 2019-01-31 2018-10-31 2018-07-31 2018-04-30 2018-01-31 2017-10-31 2017-07-31 2017-04-30 2017-01-31 2016-10-31 2016-07-31 2016-04-30 2016-01-31 2015-10-31 2015-07-31 2015-04-30 2015-01-31 2014-10-31 2014-07-31 2014-04-30 2014-01-31 2013-10-31 2013-07-31 2013-04-30 2013-01-31 2012-10-31 2012-07-31 2012-04-30 2012-01-31 2011-10-31 2011-07-31 2011-04-30 2011-01-31 2010-10-31 2010-07-31 2010-04-30 2010-01-31 2009-10-31 2009-07-31 2009-04-30 2009-01-31 2008-10-31 2008-07-31 2008-04-30 2008-01-31 2007-10-31 2007-07-31 2007-04-30 2007-01-31 2006-10-31 2006-07-31 2006-04-30 2006-01-31 2005-10-31 2005-07-31 
                                                                                        
      net sales
    364,552,000 238,223,000 120,486,000 125,212,000 360,360,000 244,859,000 127,945,000 113,702,000 323,885,000 217,106,000 111,438,000 107,388,000 305,633,000 200,208,000 98,539,000 93,158,000 255,431,000 169,670,000 82,460,000 78,129,000 226,852,000 150,597,000 76,097,000 64,844,000 218,383,000 142,127,000 71,122,000 70,117,000 206,908,000 136,023,000 66,143,000 65,613,000 200,387,000 135,540,000 66,646,000 65,776,000 196,531,000 131,786,000 66,612,000 64,916,000 197,397,000 133,162,000 67,795,000 65,519,000 195,883,000 130,687,000 66,044,000 66,045,000 200,268,000 132,851,000 63,546,000 63,892,000 186,691,000 122,539,000 61,417,000 61,116,000 179,565,000 119,785,000 59,582,000 57,731,000 169,024,000 113,486,000 56,285,000 54,653,000 164,397,000 108,138,000 53,404,000 55,934,000 180,311,000 122,258,000 63,128,000 59,505,000 172,854,000 113,311,000 55,285,000 54,159,000 157,958,000 105,002,000 52,129,000 51,694,000 153,516,000 101,752,000 47,789,000  
      yoy
    1.16% -2.71% -5.83% 10.12% 11.26% 12.78% 14.81% 5.88% 5.97% 8.44% 13.09% 15.28% 19.65% 18.00% 19.50% 19.24% 12.60% 12.66% 8.36% 20.49% 3.88% 5.96% 7.00% -7.52% 5.55% 4.49% 7.53% 6.86% 3.25% 0.36% -0.75% -0.25% 1.96% 2.85% 0.05% 1.32% -0.44% -1.03% -1.74% -0.92% 0.77% 1.89% 2.65% -0.80% -2.19% -1.63% 3.93% 3.37% 7.27% 8.42% 3.47% 4.54% 3.97% 2.30% 3.08% 5.86% 6.24% 5.55% 5.86% 5.63% 2.81% 4.95% 5.39% -2.29% -8.83% -11.55% -15.40% -6.00% 4.31% 7.90% 14.19% 9.87% 9.43% 7.91% 6.05% 4.77% 2.89% 3.19% 9.08%      
      qoq
    53.03% 97.72% -3.77% -65.25% 47.17% 91.38% 12.53% -64.89% 49.18% 94.82% 3.77% -64.86% 52.66% 103.18% 5.78% -63.53% 50.55% 105.76% 5.54% -65.56% 50.64% 97.90% 17.35% -70.31% 53.65% 99.84% 1.43% -66.11% 52.11% 105.65% 0.81% -67.26% 47.84% 103.37% 1.32% -66.53% 49.13% 97.84% 2.61% -67.11% 48.24% 96.42% 3.47% -66.55% 49.89% 97.88% -0.00% -67.02% 50.75% 109.06% -0.54% -65.78% 52.35% 99.52% 0.49% -65.96% 49.91% 101.04% 3.21% -65.84% 48.94% 101.63% 2.99% -66.76% 52.03% 102.49% -4.52% -68.98% 47.48% 93.67% 6.09% -65.57% 52.55% 104.96% 2.08% -65.71% 50.43% 101.43% 0.84% -66.33% 50.87% 112.92%   
      cost of goods sold
    -263,027,000 -170,426,000 -84,991,000 -90,379,000 -252,110,000 -169,631,000 -87,165,000 -80,678,000 -231,815,000 -155,173,000 -80,447,000 -76,954,000 -232,840,000                                                                        
      gross profit
    101,525,000 67,797,000 35,495,000 34,833,000 108,250,000 75,228,000 40,780,000 33,024,000 92,070,000 61,933,000 30,991,000 30,434,000 72,793,000 45,326,000 22,310,000 17,481,000 45,034,000 29,404,000 13,818,000 10,242,000 54,999,000 38,476,000 20,304,000 15,545,000 60,278,000 38,893,000 19,935,000 17,412,000 48,248,000 31,414,000 16,010,000 15,650,000 56,352,000 38,609,000 18,969,000 16,081,000 57,631,000 39,850,000 20,725,000 18,866,000 58,283,000 39,715,000 20,653,000 16,722,000 43,435,000 29,002,000 13,769,000 12,373,000 47,277,000 33,393,000 16,500,000 16,108,000 50,391,000 33,500,000 17,231,000 15,543,000 43,462,000 28,757,000 14,203,000 12,433,000 37,607,000 25,700,000 13,208,000 11,525,000 38,163,000 24,993,000 12,323,000 11,875,000 37,509,000 24,289,000 12,376,000 11,235,000 34,835,000 23,778,000 12,430,000 12,001,000 33,699,000 22,160,000 10,663,000 9,057,000 29,017,000 18,995,000 8,427,000  
      yoy
    -6.21% -9.88% -12.96% 5.48% 17.57% 21.47% 31.59% 8.51% 26.48% 36.64% 38.91% 74.10% 61.64% 54.15% 61.46% 70.68% -18.12% -23.58% -31.94% -34.11% -8.76% -1.07% 1.85% -10.72% 24.93% 23.81% 24.52% 11.26% -14.38% -18.64% -15.60% -2.68% -2.22% -3.11% -8.47% -14.76% -1.12% 0.34% 0.35% 12.82% 34.18% 36.94% 50.00% 35.15% -8.13% -13.15% -16.55% -23.19% -6.18% -0.32% -4.24% 3.64% 15.94% 16.49% 21.32% 25.01% 15.57% 11.89% 7.53% 7.88% -1.46% 2.83% 7.18% -2.95% 1.74% 2.90% -0.43% 5.70% 7.68% 2.15% -0.43% -6.38% 3.37% 7.30% 16.57% 32.51% 16.14% 16.66% 26.53%      
      qoq
    49.75% 91.00% 1.90% -67.82% 43.90% 84.47% 23.49% -64.13% 48.66% 99.84% 1.83% -58.19% 60.60% 103.16% 27.62% -61.18% 53.16% 112.79% 34.92% -81.38% 42.94% 89.50% 30.61% -74.21% 54.98% 95.10% 14.49% -63.91% 53.59% 96.21% 2.30% -72.23% 45.96% 103.54% 17.96% -72.10% 44.62% 92.28% 9.85% -67.63% 46.75% 92.30% 23.51% -61.50% 49.77% 110.63% 11.28% -73.83% 41.58% 102.38% 2.43% -68.03% 50.42% 94.42% 10.86% -64.24% 51.14% 102.47% 14.24% -66.94% 46.33% 94.58% 14.60% -69.80% 52.69% 102.82% 3.77% -68.34% 54.43% 96.26% 10.16% -67.75% 46.50% 91.30% 3.57% -64.39% 52.07% 107.82% 17.73% -68.79% 52.76% 125.41%   
      gross margin %
    27.85% 28.46% 29.46% 27.82% 30.04% 30.72% 31.87% 29.04% 28.43% 28.53% 27.81% 28.34% 23.82% 22.64% 22.64% 18.76% 17.63% 17.33% 16.76% 13.11% 24.24% 25.55% 26.68% 23.97% 27.60% 27.36% 28.03% 24.83% 23.32% 23.09% 24.21% 23.85% 28.12% 28.49% 28.46% 24.45% 29.32% 30.24% 31.11% 29.06% 29.53% 29.82% 30.46% 25.52% 22.17% 22.19% 20.85% 18.73% 23.61% 25.14% 25.97% 25.21% 26.99% 27.34% 28.06% 25.43% 24.20% 24.01% 23.84% 21.54% 22.25% 22.65% 23.47% 21.09% 23.21% 23.11% 23.08% 21.23% 20.80% 19.87% 19.60% 18.88% 20.15% 20.98% 22.48% 22.16% 21.33% 21.10% 20.46% 17.52% 18.90% 18.67% 17.63%  
      selling, general and administrative expenses
    -51,785,000 -35,150,000 -18,541,000 -19,189,000 -55,674,000 -36,556,000 -19,590,000 -20,132,000 -53,317,000 -33,612,000 -17,835,000 -17,725,000 -44,462,000 -31,451,000 -15,741,000 -10,996,000 -41,054,000 -27,041,000 -13,373,000 -8,558,000 -43,647,000 -29,055,000 -15,127,000 -19,412,000 -44,584,000 -28,899,000 -15,814,000 -13,157,000 -42,091,000 -27,584,000 -15,007,000 -12,767,000 -44,565,000 -29,936,000 -15,053,000 -13,230,000 -45,252,000 -31,217,000 -17,679,000 -15,394,000 -46,342,000 -26,539,000 -12,877,000 -10,919,000 -34,085,000 -21,561,000 -10,609,000 -11,021,000 -36,211,000 -23,317,000 -12,158,000 -11,695,000 -35,863,000 -23,654,000 -10,820,000 -13,428,000 -33,875,000 -22,132,000 -12,407,000 -8,378,000 -27,953,000 -18,824,000 -9,386,000 -8,612,000 -27,527,000 -18,158,000 -8,971,000 -8,090,000 -26,711,000 -17,080,000 -8,738,000 -7,993,000 -25,347,000 -17,111,000 -8,860,000 -9,836,000 -25,327,000 -16,812,000 -8,161,000 -7,335,000 -22,400,000 -15,001,000 -7,259,000  
      income from operations
    49,740,000 32,647,000 16,954,000 15,644,000 52,576,000 38,672,000 21,190,000 12,892,000 38,753,000 28,321,000 13,156,000 12,709,000 28,331,000 13,875,000 6,569,000 6,485,000 -1,664,000 2,363,000 445,000 1,684,000 11,352,000 9,421,000 5,177,000 9,133,000 15,694,000 9,994,000 4,121,000 4,255,000 6,157,000 3,830,000 1,003,000 2,883,000 11,787,000 8,673,000 3,916,000 2,851,000 12,379,000 8,633,000 3,046,000 3,472,000 11,941,000 13,176,000 7,776,000 5,803,000 9,350,000 7,441,000 3,160,000 1,352,000 11,066,000 10,076,000 4,342,000 4,413,000 14,458,000 9,784,000 6,399,000 492,000 9,587,000 6,625,000 1,796,000 4,055,000 9,654,000 6,876,000 3,822,000 2,913,000 10,636,000 6,835,000 3,352,000 3,785,000 10,798,000 7,209,000 3,638,000 3,242,000 9,488,000 6,667,000 3,570,000 2,165,000 8,372,000 5,348,000 2,502,000 1,722,000 7,032,000 4,409,000 1,583,000  
      yoy
    -5.39% -15.58% -19.99% 21.35% 35.67% 36.55% 61.07% 1.44% 36.79% 104.12% 100.27% 95.98% -1802.58% 487.18% 1376.18% 285.10% -114.66% -74.92% -91.40% -81.56% -27.67% -5.73% 25.62% 114.64% 154.90% 160.94% 310.87% 47.59% -47.76% -55.84% -74.39% 1.12% -4.78% 0.46% 28.56% -17.89% 3.67% -34.48% -60.83% -40.17% 27.71% 77.07% 146.08% 329.22% -15.51% -26.15% -27.22% -69.36% -23.46% 2.98% -32.15% 796.95% 50.81% 47.68% 256.29% -87.87% -0.69% -3.65% -53.01% 39.20% -9.23% 0.60% 14.02% -23.04% -1.50% -5.19% -7.86% 16.75% 13.81% 8.13% 1.90% 49.75% 13.33% 24.66% 42.69% 25.73% 19.06% 21.30% 58.05%      
      qoq
    52.36% 92.56% 8.37% -70.24% 35.95% 82.50% 64.37% -66.73% 36.83% 115.27% 3.52% -55.14% 104.19% 111.22% 1.30% -489.72% -170.42% 431.01% -73.57% -85.17% 20.50% 81.98% -43.32% -41.81% 57.03% 142.51% -3.15% -30.89% 60.76% 281.85% -65.21% -75.54% 35.90% 121.48% 37.36% -76.97% 43.39% 183.42% -12.27% -70.92% -9.37% 69.44% 34.00% -37.94% 25.66% 135.47% 133.73% -87.78% 9.83% 132.06% -1.61% -69.48% 47.77% 52.90% 1200.61% -94.87% 44.71% 268.88% -55.71% -58.00% 40.40% 79.91% 31.20% -72.61% 55.61% 103.91% -11.44% -64.95% 49.78% 98.16% 12.21% -65.83% 42.31% 86.75% 64.90% -74.14% 56.54% 113.75% 45.30% -75.51% 59.49% 178.52%   
      operating margin %
    13.64% 13.70% 14.07% 12.49% 14.59% 15.79% 16.56% 11.34% 11.97% 13.04% 11.81% 11.83% 9.27% 6.93% 6.67% 6.96% -0.65% 1.39% 0.54% 2.16% 5.00% 6.26% 6.80% 14.08% 7.19% 7.03% 5.79% 6.07% 2.98% 2.82% 1.52% 4.39% 5.88% 6.40% 5.88% 4.33% 6.30% 6.55% 4.57% 5.35% 6.05% 9.89% 11.47% 8.86% 4.77% 5.69% 4.78% 2.05% 5.53% 7.58% 6.83% 6.91% 7.74% 7.98% 10.42% 0.81% 5.34% 5.53% 3.01% 7.02% 5.71% 6.06% 6.79% 5.33% 6.47% 6.32% 6.28% 6.77% 5.99% 5.90% 5.76% 5.45% 5.49% 5.88% 6.46% 4.00% 5.30% 5.09% 4.80% 3.33% 4.58% 4.33% 3.31%  
      other income
                                                                                        
      interest expense
    -1,648,000 -1,111,000 -556,000 -546,000 -1,888,000 -1,340,000 -734,000 -702,000 -1,102,000 -723,000 -361,000 -370,000 -1,094,000 -731,000 -364,000 -360,000 -868,000 -490,000 -177,000 -180,000 -542,000 -356,000 -192,000 -204,000 -314,000 -206,000 -103,000 -160,000 -434,000 -293,000 -151,000 -127,000 -549,000 -400,000 -201,000 -166,000 -722,000 -489,000 -251,000 -267,000 -768,000 -511,000 -259,000 -309,000 -1,018,000 -689,000 -382,000 -383,000 -1,186,000 -809,000 -424,000 -399,000 -1,374,000 -927,000 -481,000 -503,000 -1,557,000 -1,028,000 -524,000 -558,000 -1,495,000 -945,000 -411,000 -293,000 -1,052,000 -715,000 -374,000 -457,000 -1,453,000 -983,000 -505,000 -493,000 -1,696,000 -1,144,000 -574,000 -538,000 -1,851,000 -1,258,000 -617,000 -647,000 -1,608,000 -969,000 -430,000  
      interest income
    1,087,000 701,000 394,000 340,000 358,000 236,000 150,000 116,000 757,000 472,000 175,000 253,000 212,000 115,000 56,000 19,000 26,000 17,000 9,000 17,000 54,000 40,000 25,000 21,000 238,000 190,000 98,000 101,000 149,000 96,000 49,000 60,000 199,000 119,000 54,000 57,000 38,000 16,000 8,000 11,000 18,000 9,000 3,000 2,000 11,000 5,000 3,000 4,000 19,000 16,000 10,000 10,000 24,000 17,000 9,000 9,000 22,000 14,000 8,000 -14,000 75,000 38,000 19,000 23,000 103,000 74,000 40,000 44,000 321,000 261,000 165,000 186,000 884,000 652,000 368,000 364,000 1,051,000 691,000 338,000 363,000 743,000 410,000 189,000  
      other
    2,220,000 1,251,000 882,000 585,000 -336,000 -1,106,000 -404,000 323,000 -758,000 -558,000 -140,000 318,000 -1,134,000 -1,783,000 176,000 640,000 1,734,000 1,190,000 433,000 -134,000 1,210,000 807,000 -255,000 -1,201,000 -186,000 -143,000 -39,000 219,000 4,504,000 39,000 -17,000 -155,000 768,000 518,000 70,000 296,000 -4,000 -237,000 -124,000 149,000 185,000 -65,000 20,000 369,000 310,000 -6,000 84,000 43,000 387,000 140,000 -35,000 2,000 421,000 214,000 130,000 173,000 334,000 141,000 193,000 22,000 424,000 65,000 50,000 393,000 304,000 82,000 37,000 586,000 9,000 -232,000 -221,000 53,000 346,000 133,000 62,000 577,000 328,000 147,000 25,000 215,000 171,000 102,000 61,000  
      total other income
    1,659,000 841,000 720,000         512,000 -6,874,000 -2,399,000 -132,000 -4,000 892,000 717,000 265,000 -390,000 722,000 491,000  -1,545,000 -262,000   -83,000 4,219,000   -222,000 418,000 237,000          -174,250 -697,000 -690,000 -295,000 -195,000 -780,000 -653,000 -449,000 -232,250 -929,000 -696,000 -342,000 -300,250 -1,201,000 -873,000 -323,000 -249,000 -996,000 -842,000 -342,000 -161,250 -645,000 -559,000 -297,000 -280,750 -1,123,000 -954,000 -561,000 -116,500 -466,000 -359,000  -118,000 -472,000 -420,000 -254,000 -164,000 -694,000 -457,000   
      income before income taxes
    51,399,000 33,488,000 17,674,000 15,501,000 50,710,000 36,462,000 20,202,000 12,001,000 37,650,000 27,512,000 12,830,000 13,221,000 21,457,000 11,476,000 6,437,000 6,481,000 -772,000 3,080,000 710,000 1,294,000 12,074,000 9,912,000 4,755,000 7,588,000 15,432,000 9,835,000 4,077,000 4,172,000 10,376,000 3,672,000 884,000 2,661,000 12,205,000 8,910,000 3,839,000 2,854,000 11,691,000 7,923,000 2,679,000 2,981,000 11,376,000 12,609,000 7,540,000 5,516,000 8,653,000 6,751,000 2,865,000 1,051,000 10,286,000 9,423,000 3,893,000 3,970,000 13,529,000 9,088,000 6,057,000 -25,000 8,386,000 5,752,000 1,473,000 3,483,000 8,658,000 6,034,000 3,480,000 2,823,000 9,991,000 6,276,000 3,055,000 3,634,000 9,675,000 6,255,000 3,077,000 3,153,000 9,022,000 6,308,000 3,426,000 2,545,000 7,900,000 4,928,000 2,248,000 1,558,000 6,338,000 3,952,000 1,403,000  
      income tax expense
    -8,848,000 -5,463,000 -2,218,000 -2,446,000 -9,769,000 -7,165,000 -3,826,000 -3,476,000 -6,749,000 -4,388,000 -2,088,000   -2,400,000 -1,207,000   -524,000 -115,000 -737,000 -1,651,000 -1,675,000 -806,000 -1,707,000 -2,573,000 -1,626,000  -334,000 -1,599,000 -456,000  22,000 -6,666,000 -6,956,000 -789,000 -1,532,000 -2,221,000                                                
      net income
    42,551,000 28,025,000 15,456,000 13,055,000 40,941,000 29,297,000 16,376,000 8,525,000 30,901,000 23,124,000 10,742,000 11,919,000 17,564,000 9,076,000 5,230,000 5,189,000 423,000 2,556,000 595,000 557,000 10,423,000 8,237,000 3,949,000 5,881,000 12,859,000 8,209,000 3,460,000 3,838,000 8,777,000 3,216,000 934,000 2,683,000 5,539,000 1,954,000 3,050,000 1,322,000 9,470,000 6,259,000 2,009,000 5,261,000 8,352,000 9,244,000 5,423,000 5,066,000 6,302,000 4,917,000 2,120,000 466,000 7,890,000 7,168,000 2,887,000 4,737,000 9,849,000 6,598,000 4,452,000 -108,000 6,206,000 4,314,000 1,075,000 2,895,000 6,156,000 4,296,000 2,519,000 2,416,000 7,042,000 4,456,000 2,194,000 2,552,000 7,034,000 4,618,000 2,246,000 2,453,000 6,586,000 4,573,000 2,484,000 2,051,000 5,609,000 3,610,000 1,647,000 1,141,000 4,118,000 2,895,000 1,028,000  
      yoy
    3.93% -4.34% -5.62% 53.14% 32.49% 26.70% 52.45% -28.48% 75.93% 154.78% 105.39% 129.70% 4052.25% 255.09% 778.99% 831.60% -95.94% -68.97% -84.93% -90.53% -18.94% 0.34% 14.13% 53.23% 46.51% 155.25% 270.45% 43.05% 58.46% 64.59% -69.38% 102.95% -41.51% -68.78% 51.82% -74.87% 13.39% -32.29% -62.95% 3.85% 32.53% 88.00% 155.80% 987.12% -20.13% -31.40% -26.57% -90.16% -19.89% 8.64% -35.15% -4486.11% 58.70% 52.94% 314.14% -103.73% 0.81% 0.42% -57.32% 19.83% -12.58% -3.59% 14.81% -5.33% 0.11% -3.51% -2.32% 4.04% 6.80% 0.98% -9.58% 19.60% 17.42% 26.68% 50.82% 79.75% 36.21% 24.70% 60.21%      
      qoq
    51.83% 81.32% 18.39% -68.11% 39.74% 78.90% 92.09% -72.41% 33.63% 115.27% -9.87% -32.14% 93.52% 73.54% 0.79% 1126.71% -83.45% 329.58% 6.82% -94.66% 26.54% 108.58% -32.85% -54.27% 56.65% 137.25% -9.85% -56.27% 172.92% 244.33% -65.19% -51.56% 183.47% -35.93% 130.71% -86.04% 51.30% 211.55% -61.81% -37.01% -9.65% 70.46% 7.05% -19.61% 28.17% 131.93% 354.94% -94.09% 10.07% 148.29% -39.05% -51.90% 49.27% 48.20% -4222.22% -101.74% 43.86% 301.30% -62.87% -52.97% 43.30% 70.54% 4.26% -65.69% 58.03% 103.10% -14.03% -63.72% 52.32% 105.61% -8.44% -62.75% 44.02% 84.10% 21.11% -63.43% 55.37% 119.19% 44.35% -72.29% 42.25% 181.61%   
      net income margin %
    11.67% 11.76% 12.83% 10.43% 11.36% 11.96% 12.80% 7.50% 9.54% 10.65% 9.64% 11.10% 5.75% 4.53% 5.31% 5.57% 0.17% 1.51% 0.72% 0.71% 4.59% 5.47% 5.19% 9.07% 5.89% 5.78% 4.86% 5.47% 4.24% 2.36% 1.41% 4.09% 2.76% 1.44% 4.58% 2.01% 4.82% 4.75% 3.02% 8.10% 4.23% 6.94% 8.00% 7.73% 3.22% 3.76% 3.21% 0.71% 3.94% 5.40% 4.54% 7.41% 5.28% 5.38% 7.25% -0.18% 3.46% 3.60% 1.80% 5.01% 3.64% 3.79% 4.48% 4.42% 4.28% 4.12% 4.11% 4.56% 3.90% 3.78% 3.56% 4.12% 3.81% 4.04% 4.49% 3.79% 3.55% 3.44% 3.16% 2.21% 2.68% 2.85% 2.15%  
      earnings per share
                                                                                        
      basic common
    3.15 2.07 1.14 0.758 3.03 2.17 2.43 1.148 4.59 3.44 1.61 1.79 2.66 1.37 0.8 0.77 0.06 0.38 0.08 0.09 1.52 1.2 0.57 0.85 1.85 1.19 0.51 0.55 1.27 0.46 0.13 0.4 0.82 0.29 0.45 0.19 1.41 0.93 0.3 0.79 1.25 1.39 0.82 0.77 0.96 0.75 0.32 0.07 1.2 1.09 0.44 0.73 1.52 1.02 0.69 -0.01 0.93 0.65 0.16 0.43 0.93 0.65 0.38 0.36 1.06 0.67 0.33 0.38 1.06 0.7 0.34 0.37 1.01 0.7 0.38 0.32 0.9 0.58 0.27 0.203 0.81 0.57 0.2  
      basic class b
    2.37 1.56 0.86 0.57 2.28 1.63 1.82 0.863 3.45                               0.235 0.94 1.04 0.61 0.18 0.72 0.56 0.24 0.225 0.9 0.82 0.33 0.285 1.14 0.77 0.52 0.175 0.7 0.49 0.12 0.18 0.72 0.49 0.3 0.2 0.8 0.5 0.25 0.215 0.86 0.56 0.27 0.203 0.81 0.57 0.31 0.165 0.66 0.43 0.2 0.15 0.6 0.43 0.15  
      diluted common
    2.93 1.93 1.06 0.703 2.81 2.01 2.25 1.065 4.26 3.19 1.5 1.55 2.58 1.34 0.78 0.75 0.06 0.37 0.08 0.08 1.49 1.17 0.56 0.96 1.69 1.09 0.46 0.5 1.17 0.42 0.12 0.36 0.75 0.26 0.41 0.18 1.29 0.86 0.28                                              
      diluted class b
    2.37 1.56 0.86 0.57 2.28 1.63 1.82 0.863 3.45                                                                            
      average shares outstanding
                                                                                        
      dividends declared per share
                                                                                        
      common stock
    0.59 0.385 0.18 0.18 0.465 0.31 0.31                                                                              
      class b stock
    0.441 0.288 0.135 0.135 0.35 0.233 0.233                                                                              
      total other expense
       -143,000 -1,866,000 -2,210,000 -988,000 -891,000 -1,103,000 -809,000 -326,000            -422,000   -159,000 -44,000   -158,000 -119,000    -77,000 3,000 -688,000 -710,000 -367,000 -491,000 -565,000 -567,000 -236,000                                -144,000          
      loss on pension termination
               206,000 -4,858,000                                                                        
      net loss attributable to noncontrolling interest
                -68,000 -21,000  -7,000 -55,000 -31,000  -46,000 -87,000 -46,000 -35,000 -38,750 -155,000   -8,750 -35,000                                                        
      net income attributable to oil-dri
           8,525,000 30,901,000 23,124,000 10,742,000 11,919,000 17,632,000 9,097,000 5,241,000 5,196,000 478,000 2,587,000 585,000 603,000 10,510,000 8,283,000 3,984,000 5,886,000 13,014,000 8,366,000 3,536,000 3,799,000 8,812,000 3,193,000 906,000                                                      
      basic class b common
             2.58 1.21 0.498 1.99 1.03 0.6 0.58 0.05 0.28 0.07 0.06 1.14 0.89 0.43 0.63 1.39 0.89 0.38 0.41 0.95 0.34 0.1 0.29 0.62 0.22 0.34 0.14 1.06 0.7 0.23                                              
      diluted class b common
             2.58 1.21 0.493 1.97 1.02 0.59 0.57 0.05 0.28 0.06 0.07 1.11 0.88 0.42                                                              
      net income per share
                                                                                        
      loss on impairment of goodwill
                    -5,644,000                                                                    
      income tax benefit
               -973,250 -3,893,000   298,750 1,195,000          -617,000    50,000                                                      
      cost of sales
                 -154,882,000 -76,229,000 -75,677,000 -210,397,000 -140,266,000 -68,642,000 -67,887,000 -171,853,000 -112,121,000 -55,793,000 -49,299,000 -158,105,000 -103,234,000 -51,187,000 -52,705,000 -158,660,000 -104,609,000 -50,133,000 -49,963,000 -144,035,000 -96,931,000 -47,677,000 -49,695,000 -138,900,000 -91,936,000 -45,887,000 -46,050,000 -139,114,000 -93,447,000 -47,142,000 -48,797,000 -152,448,000 -101,685,000 -52,275,000 -53,672,000 -152,991,000 -99,458,000 -47,046,000 -47,784,000 -136,300,000 -89,039,000 -44,186,000 -45,573,000 -136,103,000 -91,028,000 -45,379,000 -45,298,000 -131,417,000 -87,786,000 -43,077,000 -43,128,000 -126,234,000 -83,145,000 -41,081,000 -44,059,000 -142,802,000 -97,969,000 -50,752,000 -48,270,000 -138,019,000 -89,533,000 -42,855,000 -42,158,000 -124,259,000 -82,842,000 -41,466,000 42,637,000 124,499,000 82,757,000 39,362,000  
      net income attributable to noncontrolling interest
                  -11,000    10,000       -157,000 -76,000   23,000 28,000                                                      
      retained earnings:
                                                                                        
      balance at beginning of period
                               39,733,750 158,935,000 158,935,000 158,935,000 38,683,750 154,735,000 154,735,000 154,735,000 37,486,250 149,945,000 149,945,000 149,945,000 35,523,750 142,095,000 142,095,000 142,095,000 34,009,750 136,039,000 136,039,000 136,039,000 33,187,500 132,750,000 132,750,000 132,750,000 30,725,250 122,901,000 122,901,000 122,901,000                              
      cash dividends declared
                               -1,257,250 -5,029,000 -3,340,000 -1,656,000                                         -634,750 -2,539,000 -1,690,000           
      reclassification to retained earnings upon adoption of accounting standard
                                   566,000 2,264,000                                                    
      balance at end of period
                               40,679,500 162,718,000 158,788,000 158,185,000 39,465,500 157,862,000 153,571,000 156,226,000 38,741,500 154,966,000 153,240,000 150,475,000 36,548,750 146,195,000 148,493,000 146,080,000 34,601,250 138,405,000 138,330,000 136,846,000 34,225,250 136,901,000 137,422,000 134,382,000 32,312,000 129,248,000 125,997,000 126,196,000                              
      cash dividends declared and treasury stock issuances
                                   -1,169,000 -4,676,000 -3,118,000 -1,559,000 -1,112,250 -4,449,000 -2,964,000 -1,479,000 -1,063,000 -4,252,000 -2,846,000 -1,438,000 -984,000 -3,936,000 -2,626,000 -1,313,000 -934,750 -3,739,000 -2,496,000 -1,255,000 -875,500 -3,502,000 -3,502,000 -1,157,000 -868,750 -3,475,000 -2,339,000 -1,207,000 -862,250 -3,449,000 -2,394,000 -1,238,000 -764,000 -3,056,000 -2,007,000 -997,000 -736,750 -2,947,000 -1,947,000 -1,013,000              
      income taxes
                                         -1,664,000 -670,000 2,280,000 -3,024,000 -3,365,000 -2,117,000 -450,000 -2,351,000 -1,834,000 -745,000 -585,000 -2,396,000 -2,255,000 -1,006,000 767,000 -3,680,000 -2,490,000 -1,605,000 -83,000 -2,180,000 -1,438,000 -398,000 -588,000 -2,502,000 -1,738,000 -961,000 -407,000 -2,949,000 -1,820,000 -861,000 -1,082,000 -2,641,000 -1,637,000 -831,000 -700,000 -2,436,000 -1,735,000 -942,000 -494,000 -2,291,000 -1,318,000 -601,000 417,000 2,220,000 1,057,000 375,000  
      basic class b
    2.37 1.56 0.86 0.57 2.28 1.63 1.82 0.863 3.45                               0.235 0.94 1.04 0.61 0.18 0.72 0.56 0.24 0.225 0.9 0.82 0.33 0.285 1.14 0.77 0.52 0.175 0.7 0.49 0.12 0.18 0.72 0.49 0.3 0.2 0.8 0.5 0.25 0.215 0.86 0.56 0.27 0.203 0.81 0.57 0.31 0.165 0.66 0.43 0.2 0.15 0.6 0.43 0.15  
      diluted
                                           0.288 1.15 1.28 0.75 0.71 0.88 0.69 0.3 0.06 1.11 1.01 0.41 0.67 1.4 0.94 0.64 -0.01 0.86 0.6 0.15 0.4 0.86 0.6 0.35 0.34 0.96 0.61 0.3 0.35 0.97 0.64 0.31 0.34 0.91 0.64 0.35 0.29 0.8 0.52 0.24 0.178 0.71 0.5 0.18  
      capacity rationalization charges
                                                        -70,000 -62,000 -12,000                              
      retained earnings
                                                                                        
      balance at beginning of year
                                                           30,347,000 121,388,000 121,388,000 121,388,000 29,229,250 116,917,000 116,917,000 116,917,000 27,898,250 111,593,000 111,593,000 111,593,000 26,491,500 105,966,000 105,966,000 105,966,000 25,125,750 100,503,000 100,503,000 100,503,000 24,347,500 97,390,000 97,390,000 97,390,000 23,722,750 94,891,000 94,891,000 94,891,000  
      retained earnings – april 30
                                                           31,029,750 124,119,000   29,906,000 119,624,000   28,894,750 115,579,000   27,513,250 110,053,000   26,137,500 104,550,000       24,255,750 97,023,000    
      retained earnings – january 31
                                                             123,363,000    118,819,000    114,042,000    108,637,000    103,386,000    98,252,000    96,437,000   
      retained earnings – october 31
                                                              121,256,000    118,198,000    112,790,000    107,199,000        97,047,000    95,311,000  
      the accompanying notes are an integral part of the condensed consolidated financial statements.
                                                                                        
      cumulative effect of change in accounting principle, net of tax*
                                                                               -308,750 -1,235,000 -1,235,000 -1,235,000      
      cash dividends declared and treasury stock reissuances
                                                                              -843,000 -587,500 -2,350,000 -1,513,000 -755,000      
      retained earnings - october 31
                                                                              102,144,000          
      gain on sale of long-lived asset
                                                                                     415,000 415,000  
      retained earnings - april 30
                                                                               24,853,500 99,414,000        
      gain on sale of long-lived assets
                                                                                   103,750 415,000    
      less cash dividends declared and treasury stock reissuances
                                                                                   496,500 1,986,000 1,349,000 608,000  
      total other (expense)
                                                                                      -180,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-04-30 2026-01-31 2025-10-31 2025-07-31 2025-04-30 2025-01-31 2024-10-31 2024-07-31 2024-04-30 2024-01-31 2023-10-31 2023-07-31 2023-04-30 2023-01-31 2022-10-31 2022-07-31 2022-04-30 2022-01-31 2021-10-31 2021-07-31 2021-04-30 2021-01-31 2020-10-31 2020-07-31 2020-04-30 2020-01-31 2019-10-31 2019-07-31 2019-04-30 2019-01-31 2018-10-31 2018-07-31 2018-04-30 2018-01-31 2017-10-31 2017-07-31 2017-04-30 2017-01-31 2016-10-31 2016-07-31 2016-04-30 2016-01-31 2015-10-31 2015-07-31 2015-04-30 2015-01-31 2014-10-31 2014-07-31 2014-04-30 2014-01-31 2013-10-31 2013-07-31 2013-04-30 2013-01-31 2012-10-31 2012-07-31 2012-04-30 2012-01-31 2011-10-31 2011-07-31 2011-04-30 2011-01-31 2010-10-31 2010-07-31 2010-04-30 2010-01-31 2009-10-31 2009-07-31 2009-04-30 2008-10-31 2008-07-31 2008-04-30 2008-01-31 2007-10-31 2007-07-31 2007-01-31 2006-10-31 2006-04-30 2006-01-31 2005-10-31 2005-07-31 
                                                                                       
        current assets
                                                                                       
        cash and cash equivalents
      62,941,000 46,933,000 42,384,000 50,458,000 36,475,000 22,589,000 12,506,000 23,481,000 46,821,000 27,800,000 29,579,000 31,754,000 29,746,000 13,951,000 10,470,000 16,298,000 22,825,000 29,009,000 13,055,000 24,591,000 30,318,000 30,708,000 31,291,000 40,890,000 20,548,000 21,569,000 19,260,000 21,862,000 16,224,000 9,375,000 9,019,000 12,757,000 10,613,000 9,381,000 8,401,000 9,095,000 13,603,000 17,560,000 15,991,000 18,629,000 17,194,000 13,827,000 21,011,000 20,138,000 14,379,000 12,763,000 8,406,000 16,230,000 16,436,000 12,082,000 17,776,000 24,035,000 22,649,000 25,430,000 27,177,000 27,093,000 25,649,000 27,359,000 21,000,000 17,885,000 15,452,000 19,282,000 16,099,000 18,762,000 21,639,000 20,864,000 16,028,000 11,839,000 11,680,000 1,308,000 6,848,000 8,165,000 4,325,000 5,370,000 12,133,000 9,572,000 8,127,000 7,825,000 6,873,000 5,853,000 5,945,000 
        accounts receivable
      75,772,000 70,180,000 66,469,000  65,517,000 66,086,000 70,544,000  60,003,000                                                                         
        inventories
      52,420,000 53,753,000 56,645,000 51,594,000 56,531,000 55,231,000 56,025,000 54,236,000 45,468,000 46,230,000 43,832,000 42,612,000 36,664,000 37,938,000 40,419,000 35,562,000 34,951,000 29,797,000 28,692,000 23,598,000 23,584,000 23,655,000 23,493,000 23,893,000 24,096,000 22,679,000 23,803,000 24,163,000 26,738,000 28,123,000 25,413,000 22,521,000 23,415,000 22,603,000 22,759,000 22,615,000 23,813,000 23,217,000 23,567,000 23,251,000 25,025,000 22,949,000 21,486,000 21,369,000 24,285,000 23,661,000 24,332,000 24,483,000 24,401,000 22,734,000 22,344,000 20,723,000 21,349,000 22,186,000 20,998,000 19,673,000 19,389,000 21,640,000 22,263,000 19,230,000 18,331,000 17,254,000 17,296,000 16,023,000 17,390,000 16,985,000 16,398,000 17,795,000 20,136,000 19,833,000 17,744,000 16,941,000 16,396,000 17,536,000 15,237,000 14,429,000 15,947,000 16,081,000 15,444,000 14,227,000 12,686,000 
        prepaid expenses and other assets
      5,212,000 5,897,000 4,578,000 5,961,000 4,903,000 5,110,000 5,040,000 7,270,000    2,854,000 2,202,000 2,413,000 2,366,000 3,664,000 6,489,000 5,524,000 6,711,000 6,742,000 4,987,000 3,720,000 2,183,000 3,064,000 2,460,000 1,555,000 1,551,000 3,084,000 3,100,000 1,924,000 3,941,000 2,899,000 2,402,000 4,140,000 3,690,000 2,304,000 2,203,000 4,658,000 1,992,000 901,000 1,681,000 3,885,000 1,913,000 1,199,000 2,074,000 2,221,000 2,574,000 3,745,000 3,538,000 3,087,000 2,252,000 1,563,000 2,153,000 2,253,000 2,372,000 2,888,000 2,443,000 2,209,000 3,995,000 4,672,000 2,193,000 2,214,000 2,113,000 1,507,000 1,637,000 1,903,000 2,051,000 1,660,000 5,888,000 5,379,000 4,870,000 5,085,000 5,511,000 4,969,000 4,315,000 5,118,000 5,069,000 5,639,000 5,369,000 5,470,000 4,347,000 
        total current assets
      196,345,000 176,763,000 170,076,000 177,383,000 163,426,000 149,016,000 144,115,000 147,158,000 158,846,000 139,433,000 136,766,000 136,507,000 134,065,000 119,588,000 114,336,000 114,681,000 113,702,000 116,754,000 97,504,000 101,942,000 103,870,000 102,787,000 102,285,000 108,420,000 94,113,000 86,181,000 85,545,000 89,276,000 86,808,000 82,300,000 85,219,000 83,014,000 87,132,000 94,154,000 88,901,000 97,017,000 98,077,000 92,778,000 85,999,000 91,173,000 89,945,000 92,720,000 86,117,000 82,643,000 78,491,000 77,028,000 74,361,000 83,516,000 87,757,000 89,353,000 96,542,000 103,372,000 99,421,000 97,177,000 95,997,000 95,202,000 92,164,000 94,101,000 91,879,000 91,816,000 89,516,000 93,652,000 74,047,000 76,189,000 76,392,000 78,033,000 74,296,000 73,717,000 71,301,000 75,636,000 82,651,000 81,023,000 81,348,000 78,592,000 78,300,000 76,607,000 73,725,000 77,381,000 81,608,000 65,322,000 63,096,000 
        other assets
                                                                                       
        property, plant and equipment
      150,799,000 148,726,000 148,680,000  139,837,000 137,416,000 137,947,000                                                                           
        goodwill
      16,017,000 16,017,000 16,017,000 16,017,000 15,745,000 15,706,000 15,674,000 15,443,000 3,618,000 3,618,000 3,618,000 3,618,000 3,618,000 3,618,000 3,618,000 3,618,000 3,618,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,262,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 9,034,000 8,599,000 8,553,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 5,162,000 
        trademarks, trade names and patents, net of accumulated amortization of 724 and 693 at april 30, 2026 and july 31, 2025, respectively
      6,575,000                                                                                 
        customer list, net of accumulated amortization of 10,124 and 9,278 at april 30, 2026 and july 31, 2025, respectively
      18,061,000                                                                                 
        deferred income taxes
      1,182,000 879,000 854,000 1,291,000 1,909,000 1,683,000 1,075,000 1,537,000 7,117,000 6,820,000 7,028,000 7,201,000 4,022,000 3,511,000 3,509,000 3,677,000 3,410,000 2,066,000 1,895,000 2,096,000 6,574,000 6,554,000 6,587,000 7,302,000 6,397,000 7,445,000 7,786,000 7,755,000 7,013,000 7,013,000 6,902,000 7,349,000 8,272,000 9,106,000 14,172,000 2,787,000 3,884,000 3,884,000 3,884,000 3,884,000 2,468,000 2,468,000 2,468,000 2,468,000 1,570,000 1,570,000 1,570,000 1,570,000 3,539,000 3,540,000 3,986,000 3,986,000 2,611,000 2,611,000 2,611,000 2,611,000 1,193,000 1,193,000 1,193,000 1,193,000 2,867,000 2,867,000 2,867,000 2,867,000 1,080,000 1,080,000 1,080,000 1,080,000 890,000 890,000 890,000 788,000 788,000 788,000 788,000 1,722,000 1,722,000 1,647,000 1,647,000 1,647,000 1,647,000 
        operating lease right-of-use assets
      13,440,000 14,469,000 13,288,000 14,219,000 15,236,000 16,417,000 17,552,000 18,667,000 12,981,000 12,649,000 8,944,000 9,386,000 9,433,000 9,460,000 10,027,000 10,601,000 9,934,000 10,570,000 8,110,000 8,619,000 9,128,000 8,741,000 9,227,000 9,816,000 8,327,000 8,535,000 8,967,000                                                       
        other
      6,371,000 6,338,000 6,588,000 7,553,000 7,581,000 7,408,000 7,422,000 7,306,000 7,186,000 7,151,000 7,769,000 7,230,000 6,546,000 6,612,000 6,365,000 7,546,000 6,836,000 6,588,000 6,199,000 7,500,000 7,268,000 6,836,000 6,557,000 5,670,000 5,152,000 5,087,000 5,084,000 5,049,000 5,275,000 5,204,000 4,921,000 4,886,000 4,979,000 4,937,000 6,336,000 6,475,000 6,555,000 6,192,000 5,940,000 5,902,000 6,152,000 6,041,000 6,042,000 6,013,000 6,232,000 6,864,000 7,126,000 6,232,000 5,884,000 5,534,000 6,322,000 5,538,000 4,800,000 4,640,000 4,636,000 4,638,000 4,623,000 4,467,000 4,442,000 4,350,000 4,379,000 4,233,000 4,178,000 4,149,000 4,141,000 4,107,000 4,281,000 4,420,000 4,599,000 4,746,000 4,864,000 4,578,000 3,692,000 3,701,000 3,650,000 4,207,000 4,167,000 4,300,000 4,252,000 4,192,000 4,163,000 
        total other assets
      212,445,000 211,364,000 210,647,000 64,590,000 206,117,000 204,731,000 206,056,000 69,651,000 32,360,000 31,692,000 28,786,000 28,856,000 25,103,000 24,777,000 25,122,000 27,064,000 25,520,000 30,599,000 27,627,000 29,684,000 34,566,000 33,757,000 34,048,000 34,514,000 31,735,000 33,067,000 33,991,000 25,153,000 24,584,000 24,644,000 24,394,000 24,962,000 26,071,000 27,092,000 33,765,000 31,525,000 32,433,000 32,298,000 32,380,000 33,049,000 26,715,000 26,886,000 27,168,000 27,733,000 26,388,000 27,584,000 28,154,000 27,792,000 24,911,000 25,548,000 14,657,000 14,132,000 15,675,000 14,124,000 14,299,000 14,612,000 13,396,000 13,311,000 13,354,000 13,549,000 15,308,000 15,364,000 15,205,000 15,291,000 15,282,000 15,463,000 15,835,000 16,059,000 14,261,000 14,729,000 14,897,000 13,181,000 12,281,000 12,410,000 12,342,000 12,615,000 12,640,000 12,990,000 12,916,000 12,564,000 12,577,000 
        total assets
      408,790,000 388,127,000 380,723,000 391,677,000 369,543,000 353,747,000 350,171,000 354,605,000 319,152,000 296,152,000 288,768,000 286,235,000 270,296,000 256,044,000 249,113,000 249,611,000 241,452,000 247,214,000 223,888,000 227,566,000 229,634,000 228,197,000 227,371,000 235,882,000 215,981,000 209,079,000 209,742,000 205,227,000 198,478,000 193,137,000 196,951,000 194,682,000 198,010,000 205,535,000 206,917,000 212,575,000 212,053,000 206,574,000 200,067,000 204,933,000 196,149,000 199,055,000 192,086,000 190,031,000 185,426,000 184,314,000 180,727,000 186,204,000 184,637,000 183,860,000 178,429,000 183,559,000 180,854,000 176,418,000 174,708,000 174,267,000 171,938,000 174,222,000 172,518,000 173,393,000 171,359,000 172,061,000 151,343,000 153,982,000 153,539,000 153,866,000 149,126,000 149,261,000 144,104,000 143,142,000 148,988,000 144,538,000 145,361,000 143,056,000 142,087,000 140,535,000 138,245,000 139,110,000 143,142,000 126,588,000 123,571,000 
        liabilities & stockholders’ equity
                                                                        2,009,000               
        current liabilities
                                                                                       
        current maturities of notes payable
      1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000    3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,083,000 3,483,000 3,483,000 3,483,000 3,483,000 3,500,000 3,500,000 3,500,000 3,500,000 3,500,000 3,500,000 5,000,000 5,000,000 3,800,000 3,800,000 3,800,000 3,800,000 3,600,000 3,600,000 4,100,000 4,100,000 3,500,000 3,500,000 4,500,000 4,500,000 3,200,000 3,200,000 1,700,000 5,580,000 5,580,000 8,080,000 8,080,000 4,080,000 4,080,000 4,080,000 4,080,000 3,080,000 3,080,000 3,080,000 
        accounts payable
      13,848,000 10,218,000 13,945,000 16,808,000 13,177,000 14,004,000 13,824,000 15,009,000 13,728,000 12,009,000 14,867,000 17,101,000 11,919,000 11,048,000 12,088,000 13,401,000 10,099,000 10,145,000 10,173,000 9,206,000 6,912,000 7,276,000 9,745,000 12,529,000 10,524,000 9,565,000 7,942,000 8,092,000 8,608,000 7,882,000 13,287,000 6,543,000 7,747,000 8,089,000 7,828,000 9,594,000 8,105,000 7,316,000 6,910,000 6,635,000 6,002,000 7,704,000 7,561,000 7,428,000 6,165,000 6,191,000 5,599,000 7,352,000 7,102,000 7,699,000 6,907,000 6,483,000 6,742,000 6,172,000 6,551,000 6,700,000 6,576,000 6,034,000 6,621,000 6,369,000 7,612,000 7,687,000 6,424,000 6,482,000 5,974,000 5,450,000 4,500,000 5,304,000 5,887,000 7,365,000 7,491,000 7,451,000 6,130,000 6,395,000 6,181,000 6,184,000 6,215,000 5,884,000 6,158,000 6,476,000 5,228,000 
        dividends payable
      2,750,000 2,749,000 2,434,000 2,444,000 2,105,000 2,097,000 2,098,000 2,096,000 1,958,000 1,963,000 1,953,000 1,927,000 1,863,000 1,858,000 1,860,000 1,851,000 1,845,000 1,845,000 1,864,000 1,865,000 1,795,000 1,799,000 1,807,000 1,808,000 1,735,000 1,766,000 1,766,000 1,761,000 1,689,000 1,680,000 1,656,000 1,627,000 1,559,000 1,559,000 1,559,000 1,553,000 1,485,000 1,485,000 1,479,000 1,477,000 1,407,000 1,407,000 1,406,000 1,376,000 1,310,000 1,313,000 1,313,000 1,311,000 1,243,000 1,242,000 1,242,000 1,236,000   1,156,000 1,154,000 1,134,000 1,132,000 1,132,000 1,129,000 1,059,000 1,059,000 1,061,000 1,043,000 1,003,000 997,000 996,000 994,000 922,000 917,000 919,000 846,000 846,000 842,000 833,000 758,000 755,000 607,000 608,000 608,000 559,000 
        operating lease liabilities
      3,936,000 4,030,000 3,792,000 4,071,000 4,167,000 4,357,000 4,476,000 4,556,000 2,819,000 2,637,000 1,872,000 1,872,000 1,810,000 1,850,000 2,008,000 2,178,000 1,766,000 2,080,000 1,723,000 2,036,000 2,252,000 2,043,000 2,066,000 2,170,000 1,561,000 1,461,000 1,603,000                                                       
        accrued expenses
      38,386,000 33,220,000 29,715,000 44,864,000 37,207,000 30,732,000 33,443,000 44,016,000 32,413,000 28,554,000 32,613,000 36,868,000 35,312,000 33,785,000 28,336,000 30,085,000 26,697,000 23,802,000 23,746,000 24,883,000 23,950,000 22,811,000 19,852,000                                                           
        total current liabilities
      59,920,000 51,217,000 50,886,000 69,187,000 57,656,000 52,190,000 54,841,000 66,677,000 51,918,000 46,163,000 52,305,000 58,768,000 51,904,000 49,541,000 45,292,000 48,515,000 41,407,000 38,872,000 38,506,000 38,990,000 35,909,000 34,929,000 34,470,000 46,207,000 40,947,000 33,505,000 30,002,000 32,606,000 31,501,000 31,089,000 35,717,000 30,949,000 35,719,000 33,334,000 27,747,000 32,954,000 32,771,000 29,498,000 27,327,000 30,740,000 30,647,000 32,154,000 28,744,000 28,888,000 28,729,000 27,720,000 25,943,000 29,500,000 29,794,000 29,127,000 27,314,000 31,447,000 30,263,000 29,395,000 28,660,000 29,122,000 27,213,000 26,250,000 27,474,000 26,480,000 27,408,000 27,349,000 25,521,000 27,791,000 26,476,000 26,000,000 23,101,000 23,768,000 24,444,000 23,819,000 30,101,000 28,955,000 29,422,000 29,022,000 27,405,000 25,610,000 25,569,000 24,365,000 24,797,000 24,758,000 22,534,000 
        noncurrent liabilities
                                                                                       
        long-term debt
      38,847,000 38,837,000 38,827,000 38,817,000 39,807,000 39,796,000 44,777,000 49,774,000                                                                          
        deferred compensation
      6,419,000 6,371,000 6,241,000 5,777,000 6,215,000 5,956,000 5,664,000 5,667,000 5,508,000 5,423,000 5,024,000 4,512,000 4,436,000 4,441,000 4,159,000 4,559,000 4,926,000 5,060,000 4,612,000 4,370,000 5,742,000 5,725,000 5,310,000 5,140,000 4,847,000 4,881,000 6,155,000 6,014,000 5,679,000 5,664,000 6,298,000 6,100,000 6,266,000 5,996,000 11,867,000 11,537,000 11,022,000 10,991,000 10,778,000 10,504,000 9,657,000 9,622,000 9,604,000 9,518,000 9,745,000 9,624,000 9,528,000 9,267,000 9,137,000 8,976,000 8,820,000 8,569,000 8,450,000 8,398,000 8,326,000 8,117,000 7,444,000 7,312,000 7,115,000 7,196,000 6,904,000 6,789,000 6,639,000 6,818,000 6,503,000 6,281,000 6,102,000 5,892,000 5,750,000 5,634,000 5,498,000 5,148,000 4,958,000 4,848,000 4,756,000 4,182,000 4,109,000 3,845,000 3,737,000 3,687,000 3,650,000 
        long-term operating lease liabilities
      10,546,000 11,517,000 10,604,000 11,296,000 12,239,000 13,261,000 14,294,000 15,391,000 11,399,000 11,251,000 8,345,000 8,810,000 8,920,000 8,919,000 9,334,000 9,749,000 9,552,000 9,892,000 7,807,000 8,022,000 8,327,000 8,165,000 8,636,000 9,135,000 8,285,000 8,602,000 8,906,000                                                       
        total noncurrent liabilities
      63,644,000 64,460,000 63,310,000 63,430,000 65,028,000 65,697,000 71,338,000 77,340,000 64,285,000 53,951,000 50,547,000 50,391,000 51,297,000 49,529,000 49,793,000 50,747,000 54,290,000 55,051,000 29,081,000 29,344,000 40,786,000 40,827,000 42,585,000 41,711,000 28,379,000 28,645,000 41,804,000 37,075,000 29,462,000 29,284,000 29,447,000 31,848,000 33,278,000 45,939,000 51,060,000 53,584,000 56,494,000 56,571,000 55,966,000 58,642,000 48,951,000 48,830,000 48,116,000 50,615,000 49,327,000 49,667,000 49,437,000 52,396,000 46,851,000 46,675,000 46,245,000 49,174,000 57,141,000 57,182,000 57,010,000 59,837,000 48,306,000 50,233,000 49,664,000 51,615,000 50,557,000 52,838,000 33,671,000 35,602,000 33,321,000 35,619,000 35,061,000 35,930,000 28,258,000 31,423,000 31,261,000 29,098,000 31,001,000 30,676,000 34,440,000 39,690,000 39,375,000 38,898,000 43,010,000 27,690,000 27,183,000 
        total liabilities
      123,564,000 115,677,000 114,196,000 132,617,000 122,684,000 117,887,000 126,179,000 144,017,000 116,203,000 100,114,000 102,852,000 109,159,000 103,201,000 99,070,000 95,085,000 99,262,000 95,697,000 93,923,000 67,587,000 68,334,000 76,695,000 75,756,000 77,055,000 87,918,000 69,326,000 62,150,000 71,806,000 69,681,000 60,963,000 60,373,000 65,164,000 62,797,000 68,997,000 79,273,000 78,807,000 86,538,000 89,265,000 86,069,000 83,293,000 89,382,000 79,598,000 80,984,000 76,860,000 79,503,000 78,056,000 77,387,000 75,380,000 81,896,000 76,645,000 75,802,000 73,559,000 80,621,000 87,404,000 86,577,000 85,670,000 88,959,000 75,519,000 76,483,000 77,138,000 78,095,000 77,965,000 80,187,000 59,192,000 63,393,000 59,797,000 61,619,000 58,162,000 59,698,000 52,702,000 55,242,000 61,362,000 58,053,000 60,423,000 59,698,000 61,845,000 65,300,000 64,944,000 63,263,000 67,807,000 52,448,000 49,717,000 
        commitments and contingencies
                                                                                       
        stockholders’ equity
                                                                                       
        common stock
      1,535,000 1,534,000 1,533,000 1,528,000 1,527,000 1,522,000 888,000 884,000 883,000 882,000 881,000 875,000 874,000 874,000 872,000 868,000 868,000 867,000 863,000 856,000 854,000 853,000 851,000 845,000 837,000 835,000 835,000 828,000 828,000 823,000 814,000 809,000 805,000 805,000 804,000 802,000 802,000 802,000 800,000 798,000 798,000 798,000 797,000 794,000 793,000 793,000 793,000 792,000 792,000 789,000 789,000 787,000 784,000 783,000 779,000 779,000 777,000 777,000 776,000 775,000 773,000      748,000     738,000 736,000   722,000 716,000 625,000 602,000 599,000 597,000 
        class b stock
      465,000 465,000 465,000 465,000 465,000 465,000 252,000 252,000 252,000 252,000 252,000 240,000 240,000 240,000 240,000 240,000 240,000 240,000 240,000 240,000 240,000 241,000 241,000 244,000 251,000 253,000 253,000 258,000 257,000 258,000 257,000 247,000 250,000 250,000 251,000 251,000 251,000 251,000 251,000 252,000 252,000 252,000 252,000 239,000 239,000 239,000 239,000 239,000 238,000 240,000 240,000 239,000 240,000 240,000 238,000 237,000 238,000 237,000 237,000 237,000 237,000      225,000     224,000 224,000   223,000 223,000 180,000 180,000 180,000 180,000 
        additional paid-in capital
      70,344,000 68,980,000 67,597,000 66,138,000 64,536,000 63,195,000 62,601,000 60,877,000 59,449,000 58,205,000 56,746,000 55,624,000 55,488,000 54,328,000 53,385,000 52,467,000 51,117,000 50,220,000 49,377,000 48,271,000 47,591,000 46,890,000 45,779,000 44,993,000 44,149,000 43,149,000 42,327,000 41,300,000 40,487,000 39,730,000 39,186,000 38,473,000 38,022,000 37,253,000 36,775,000 36,242,000 35,676,000 35,288,000 34,853,000 34,294,000 33,809,000 33,460,000 37,622,000 33,563,000 33,518,000 33,467,000 33,403,000 33,130,000 33,095,000 32,446,000 32,439,000 31,317,000 31,059,000 30,691,000 29,998,000 29,759,000 29,570,000 29,363,000 29,303,000 29,213,000 29,028,000 28,482,000 28,238,000 25,104,000 24,851,000 23,847,000 23,516,000 23,366,000 22,809,000 22,447,000 22,218,000 21,938,000 21,572,000 21,056,000 20,150,000 19,052,000 18,317,000 18,223,000 14,742,000 14,164,000 13,871,000 
        retained earnings
      312,119,000 300,343,000 290,523,000 277,500,000 266,889,000 257,349,000 246,525,000 232,247,000 225,818,000 219,995,000 209,585,000 200,796,000 190,800,000 184,133,000 182,135,000 178,754,000 175,368,000 179,322,000 179,164,000 180,443,000 181,703,000 181,265,000 178,761,000 176,579,000 172,504,000 169,590,000 166,526,000 164,756,000 162,718,000 158,788,000 158,185,000 158,935,000 157,862,000 153,571,000 156,226,000 154,735,000 154,966,000 153,240,000 150,475,000 149,945,000 146,195,000 148,493,000 146,080,000 142,095,000 138,405,000 138,330,000 136,846,000 136,039,000 136,901,000 137,422,000 134,382,000 132,750,000 129,248,000 125,997,000 126,196,000 122,901,000 124,119,000 123,363,000 121,256,000 121,388,000 119,624,000 118,819,000 118,198,000 116,917,000 115,579,000 114,042,000 112,790,000 111,593,000 110,053,000 107,199,000 105,966,000 104,550,000 103,386,000 102,144,000 100,503,000 98,252,000 97,047,000 97,023,000 96,437,000 95,311,000 94,891,000 
        accumulated other comprehensive income
      976,000 1,075,000 925,000 969,000 751,000 561,000 727,000 769,000 698,000 733,000 563,000                                                                       
        less treasury stock, at cost
      -100,213,000 -99,947,000 -94,516,000 -87,540,000 -87,309,000 -87,232,000 -87,001,000 -84,441,000 -84,151,000 -84,029,000 -82,111,000 -81,207,000 -80,354,000 -79,886,000 -79,648,000 -79,428,000 -77,251,000 -72,862,000 -68,922,000 -66,154,000 -65,948,000 -65,071,000 -63,253,000 -62,269,000 -61,322,000 -57,138,000 -57,103,000 -56,543,000 -56,537,000 -56,480,000 -56,154,000 -55,946,000 -55,931,000 -55,813,000 -55,761,000 -55,701,000 -55,701,000 -55,681,000 -55,838,000 -55,716,000 -55,857,000 -55,845,000 -55,789,000 -55,987,000 -55,970,000 -55,451,000 -55,451,000 -55,404,000 -55,395,000 -55,344,000 -55,332,000 -55,296,000 -55,296,000 -55,276,000 -55,217,000 -55,208,000 -51,442,000 -49,268,000 -49,268,000 -49,424,000 -49,424,000      -41,722,000     -41,813,000 -41,793,000   -42,082,000 -42,082,000 -39,080,000 -36,704,000 -35,980,000 -35,366,000 
        total stockholders’ equity
      285,226,000 272,450,000 266,527,000 259,060,000 246,859,000 235,860,000 223,992,000 210,588,000 202,949,000 196,038,000 185,916,000 177,076,000 167,095,000 156,974,000 154,028,000 150,349,000 145,755,000 153,291,000 156,301,000 159,232,000 152,939,000 152,441,000 150,316,000 147,964,000 146,655,000 146,929,000 137,936,000 135,546,000 137,515,000 132,764,000 131,787,000 131,885,000 129,013,000 126,262,000 128,110,000 126,037,000 122,788,000 120,505,000 116,774,000 115,551,000 116,551,000 118,071,000 115,226,000 110,528,000 107,370,000 106,927,000 105,347,000 104,308,000 107,992,000 108,058,000 104,870,000 102,938,000 93,450,000 89,841,000 89,038,000 85,308,000 96,419,000 97,739,000 95,380,000 95,298,000 93,394,000 91,874,000 92,151,000 90,589,000 93,742,000 92,247,000 90,964,000 89,563,000 91,402,000 87,900,000 87,626,000 86,485,000 84,938,000 83,358,000 80,242,000 75,235,000 73,301,000 75,847,000 75,335,000 74,140,000 73,854,000 
        total liabilities & stockholders’ equity
      408,790,000 388,127,000 380,723,000  369,543,000 353,747,000 350,171,000  319,152,000 296,152,000 288,768,000  270,296,000 256,044,000 249,113,000  241,452,000 247,214,000 223,888,000  229,634,000 228,197,000 227,371,000  215,981,000 209,079,000 209,742,000  198,478,000 193,137,000 196,951,000  198,010,000 205,535,000 206,917,000  212,053,000 206,574,000 200,067,000  196,149,000 199,055,000 192,086,000  185,426,000 184,314,000 180,727,000  184,637,000 183,860,000 178,429,000  180,854,000 176,418,000 174,708,000  171,938,000 174,222,000 172,518,000  171,359,000 172,061,000 151,343,000  153,539,000 153,866,000 149,126,000  144,104,000 143,142,000  144,538,000 145,361,000 143,056,000  140,535,000 138,245,000 139,110,000 143,142,000 126,588,000  
        trademarks, trade names and patents, net of accumulated amortization of 731 and 693 at january 31, 2026 and july 31, 2025, respectively
       6,592,000                                                                                
        customer list, net of accumulated amortization of 9,842 and 9,278 at january 31, 2026 and july 31, 2025, respectively
       18,343,000                                                                                
        trademarks, trade names and patents, net of accumulated amortization of 710 and 693 at october 31, 2025 and july 31, 2025, respectively
        6,595,000                                                                               
        customer list, net of accumulated amortization of 9,560 and 9,278 at october 31, 2025 and july 31, 2025, respectively
        18,625,000                                                                               
        assets
                                                                                       
        accounts receivables
         69,370,000    62,171,000    59,287,000   53,062,000 51,683,000 43,287,000 45,970,000 43,082,000 40,923,000 39,088,000 38,896,000 39,212,000 34,911,000 41,846,000 35,699,000 36,269,000 35,459,000 35,906,000 38,282,000 39,935,000 33,602,000 32,566,000 32,309,000 32,054,000 32,750,000 31,969,000 32,047,000 30,971,000 30,386,000 29,161,000 30,708,000 31,889,000 31,466,000 31,965,000 32,255,000 31,893,000 30,997,000 32,854,000 37,022,000 31,732,000 31,148,000 29,784,000 31,004,000 31,381,000 30,225,000 30,495,000 28,907,000 31,294,000 29,217,000 26,269,000 26,976,000     25,569,000     31,109,000 29,973,000   26,920,000 26,009,000 25,711,000 28,165,000 24,086,000 23,611,000 
        land
         13,549,000    13,550,000                                            16,266,000    16,275,000    16,147,000    15,614,000    12,501,000   11,266,000    11,139,000      10,278,000 
        buildings and leasehold improvements
         43,529,000    41,648,000    40,940,000    40,294,000    40,181,000    39,274,000    38,852,000    38,534,000    37,284,000    36,776,000    28,518,000    28,557,000    28,475,000    28,338,000    27,642,000    24,513,000    24,479,000   23,801,000    23,426,000      22,667,000 
        machinery and equipment
         205,675,000    192,788,000    184,471,000    165,350,000    162,930,000    152,583,000    145,402,000    141,530,000    136,900,000    137,479,000    127,399,000    120,081,000    112,056,000    109,181,000    115,978,000    108,420,000    106,385,000   101,954,000    99,240,000      95,335,000 
        office furniture and equipment
         22,521,000    22,530,000    18,744,000    17,524,000    21,685,000    21,502,000    20,569,000    11,089,000    10,356,000    10,986,000    10,689,000    10,244,000    9,880,000    9,720,000    9,993,000    8,886,000    8,596,000   8,413,000    9,231,000      11,130,000 
        vehicles
         25,902,000    24,617,000    17,663,000    15,470,000    17,543,000    17,863,000    15,375,000    14,151,000    13,615,000    13,108,000    12,330,000    12,099,000    11,615,000    10,621,000    10,570,000    9,411,000    8,949,000   7,850,000    6,933,000      5,292,000 
        construction in progress
         25,149,000    20,974,000    15,856,000    24,496,000    14,627,000    13,717,000    12,519,000    13,985,000    9,649,000    2,831,000    14,188,000    11,759,000    5,845,000    2,572,000    8,949,000    10,773,000    8,220,000   2,650,000    1,509,000      4,769,000 
        mining assets
         10,893,000    9,966,000                                                                          
        capital parts
         8,861,000    7,488,000    3,292,000                                                                      
        less accumulated depreciation and amortization
         -206,375,000    -195,765,000 -194,580,000 -190,881,000 -185,348,000 -182,999,000 -180,071,000 -180,936,000 -177,891,000 -175,374,000 -174,166,000 -173,119,000 -181,968,000 -178,885,000 -176,933,000 -174,060,000 -171,287,000 -169,040,000 -166,990,000 -164,096,000 -161,164,000 -159,036,000 -157,292,000 -155,232,000 -152,441,000 -149,385,000 -147,871,000 -145,668,000 -142,826,000 -140,411,000 -138,172,000 -135,861,000 -139,476,000 -137,314,000 -136,234,000 -133,597,000 -132,210,000 -129,929,000 -128,459,000 -126,380,000 -125,608,000 -124,199,000 -122,246,000 -119,956,000 -119,840,000 -118,082,000 -117,161,000 -115,350,000 -114,255,000 -112,254,000 -111,840,000 -110,443,000 -122,961,000 -121,251,000 -119,954,000 -118,203,000 -116,795,000 -115,115,000 -113,892,000 -112,247,000 -111,099,000 -109,645,000 -107,681,000 -105,019,000 -104,494,000 -104,498,000 -102,818,000 -101,774,000 -100,033,000 -98,661,000 -108,899,000 -106,287,000 -104,824,000 -103,312,000 -101,573,000 
        total property, plant and equipment
         149,704,000    137,796,000 127,946,000 125,027,000 123,216,000 120,872,000 111,128,000 111,679,000 109,655,000 107,866,000 102,230,000 99,861,000 98,757,000 95,940,000 91,198,000 91,653,000 91,038,000 92,948,000 90,133,000 89,831,000 90,206,000 90,798,000 87,086,000 86,193,000 87,338,000 86,706,000 84,807,000 84,289,000 84,251,000 84,033,000 81,543,000 81,498,000 81,688,000 80,711,000 79,489,000 79,449,000 78,801,000 79,655,000 80,547,000 79,702,000 78,212,000 74,896,000 71,969,000 68,959,000 67,230,000 66,055,000 65,758,000 65,117,000 64,412,000 64,453,000 66,378,000 66,810,000 67,285,000 68,028,000 66,535,000 63,045,000 62,091,000 62,502,000 61,865,000 60,370,000 58,995,000 59,485,000 58,542,000 52,777,000 51,440,000 50,334,000 51,732,000 52,054,000 51,445,000 51,313,000 51,880,000 48,739,000 48,618,000 48,702,000 47,898,000 
        trademarks, trade names and patents, net of accumulated amortization of 693 and 625 in 2025 and 2024, respectively
         6,603,000                                                                              
        customer list, net of accumulated amortization of 9,278 and 8,149 in 2025 and 2024, respectively
         18,907,000                                                                              
        liabilities and stockholders’ equity
                                                                         2,009,000              
        total liabilities and stockholders’ equity
         391,677,000    354,605,000    286,235,000    249,611,000    227,566,000    235,882,000    205,227,000    194,682,000    212,575,000    204,933,000    190,031,000    186,204,000    183,559,000    174,267,000    173,393,000    153,982,000    149,261,000             123,571,000 
        trademarks, trade names and patents, net of accumulated amortization of 664 and 625 at april 30, 2025 and july 31, 2024, respectively
          6,620,000                                                                             
        customer list, net of accumulated amortization of 8,996 and 8,149 at april 30, 2025 and july 31, 2024, respectively
          19,189,000                                                                             
        trademarks, trade names and patents, net of accumulated amortization of 653 and 625 at january 31, 2025 and july 31, 2024, respectively
           6,630,000                                                                            
        customer list, net of accumulated amortization of 8,713 and 8,149 at january 31, 2025 and july 31, 2024, respectively
           19,471,000                                                                            
        trademarks, trade names and patents, net of accumulated amortization of 647 and 625 at october 31, 2024 and july 31, 2024, respectively
            6,632,000                                                                           
        customer list, net of accumulated amortization of 8,431 and 8,149 at october 31, 2024 and july 31, 2024, respectively
            19,754,000                                                                           
        trademarks, trade names and patents, net of accumulated amortization of 625 and 578 in 2024 and 2023, respectively
             6,662,000                                                                          
        customer list, net of accumulated amortization of 8,149 and 7,763 in 2024 and 2023, respectively
             20,036,000                                                                          
        prepaid expenses
              6,554,000 6,067,000 2,692,000                                                                       
        cost
              322,526,000 315,908,000 308,564,000  291,199,000 292,615,000 287,546,000  276,396,000 272,980,000 280,725,000  268,131,000 265,713,000 262,325,000  257,123,000 253,927,000 251,370,000  244,378,000 241,425,000 239,779,000  232,678,000 229,957,000 227,077,000  219,715,000 217,359,000 221,164,000  215,723,000 213,046,000 211,011,000  209,006,000 206,082,000 203,820,000  194,215,000 188,915,000 187,070,000  182,919,000 180,467,000 178,667,000  178,218,000 177,253,000 190,246,000  186,489,000 181,248,000 178,886,000  175,757,000 172,617,000 170,094,000  166,223,000 157,796,000  154,832,000 154,550,000 153,828,000  149,974,000 160,779,000 155,026,000 153,442,000 152,014,000  
        intangible assets, net of accumulated amortization of 8,394 and 8,341 at april 30, 2024 and july 31, 2023, respectively
              1,458,000                                                                         
        notes payable, net of unamortized debt issuance costs of 140 and 173 at april 30, 2024 and july 31, 2023, respectively
              40,860,000                                                                         
        accounts receivable, net allowances of 1,072 and 1,087 at january 31, 2024 and july 31, 2023, respectively
               59,336,000                                                                        
        intangible assets, net of accumulated amortization of 8,383 and 8,341 at january 31, 2024 and july 31, 2023, respectively
               1,454,000                                                                        
        notes payable, net of unamortized debt issuance costs of 149 and 173 at january 31, 2024 and july 31, 2023, respectively
               30,851,000                                                                        
        accounts receivable, net allowances of 1,115 and 1,087 at october 31, 2023 and july 31, 2023, respectively
                60,663,000                                                                       
        trademarks and patents, net of accumulated amortization of 581 and 578 at october 31, 2023 and july 31, 2023, respectively
                1,427,000                                                                       
        customer list, net of accumulated amortization of 7,785 and 7,763 at october 31, 2023 and july 31, 2023, respectively
                                                                                       
        notes payable, net of unamortized debt issuance costs of 158 and 173 at october 31, 2023 and july 31, 2023, respectively
                30,842,000                                                                       
        gross depreciable assets
                 261,818,000    238,638,000    242,339,000    231,222,000    220,198,000    205,304,000    198,155,000    198,349,000    178,936,000    170,981,000    162,026,000    157,860,000                          
        net depreciable assets
                 78,819,000    63,264,000    63,454,000    62,182,000    61,162,000    55,919,000    57,744,000    61,035,000    49,007,000    46,782,000    43,944,000    45,606,000                          
        land and mineral rights
                 22,905,000    20,106,000    17,859,000    17,049,000    17,117,000    16,802,000    16,640,000    16,845,000    16,460,000    16,355,000                                  
        trademarks and patents, net of accumulated amortization of 578 and 524 in 2023 and 2022, respectively
                 1,399,000                                                                      
        customer list, net of accumulated amortization of 7,763 and 7,608 in 2023 and 2022, respectively
                 22,000                                                                      
        notes payable, net of unamortized debt issuance costs of 173 and 202 in 2023 and 2022, respectively
                 30,827,000                                                                      
        pension and postretirement benefits
                 1,753,000 2,164,000 434,000 616,000 798,000 3,919,000 4,253,000 4,592,000 4,922,000 13,990,000 14,374,000 15,184,000 15,140,000 12,565,000 12,637,000 24,071,000 23,721,000 16,756,000 16,474,000 16,218,000 15,906,000 17,282,000 29,392,000 29,314,000 29,161,000 32,758,000 32,915,000 32,687,000 32,492,000 23,729,000 23,675,000 23,683,000 23,429,000 22,129,000 22,600,000 22,531,000 22,273,000 16,822,000 16,778,000 16,582,000 16,362,000 24,740,000 24,823,000 24,764,000 24,241,000 13,419,000 14,070,000 13,678,000 13,235,000 12,543,000 13,402,000 12,947,000 12,558,000 10,736,000 11,269,000 10,901,000 10,491,000 -85,000 -109,000 -121,000 870,000 869,000 863,000        
        noncontrolling interest
                  -437,000 -390,000 -380,000 -369,000 -362,000 -338,000 -297,000 -307,000 -261,000 -220,000 -209,000 -174,000 -169,000 -171,000 -90,000 -14,000 -53,000 5,000 11,000 -18,000                                                  
        cumulative translation adjustment
                 -264,000 -221,000 -70,000 -326,000 59,000 124,000 217,000 277,000 311,000 260,000 148,000 12,000 -260,000 -378,000 -246,000 -192,000 -148,000 -238,000 -267,000 -295,000 -231,000 -60,000 105,000 -39,000 35,000 -206,000 -106,000 -169,000 -155,000 -128,000 -420,000 -281,000 -270,000 -48,000 -182,000 170,000 255,000 248,000 193,000 420,000 487,000 554,000 595,000 588,000 573,000 641,000 572,000 606,000 799,000 817,000 598,000 517,000 492,000 555,000 319,000 269,000 282,000 -158,000 -162,000 612,000 663,000 718,000 954,000 507,000 151,000 253,000 208,000 92,000 -93,000 -282,000 
        total accumulated other comprehensive income
                 748,000 484,000                                   -8,263,000   -5,053,000                               
        accounts receivable, net allowances of 1,071 and 922 at april 30, 2023 and july 31, 2022, respectively
                  56,983,000                                                                     
        prepaid repairs
                  8,470,000 8,107,000 8,019,000  6,150,000 6,454,000                                                                
        trademarks and patents, net of accumulated amortization of 570 and 524 at april 30, 2023 and july 31, 2022, respectively
                  1,423,000                                                                     
        customer list, net of accumulated amortization of 7,724 and 7,608 at april 30, 2023 and july 31, 2022, respectively
                  61,000                                                                     
        notes payable, net of unamortized debt issuance costs of 182 and 202 at april 30, 2023 and july 31, 2022, respectively
                  31,818,000                                                                     
        accumulated other comprehensive loss:
                                                                                       
        pension and postretirement obligation
                  705,000                                                                     
        accounts receivable, net allowances of 1,037 and 922 at january 31, 2023 and july 31, 2022, respectively
                   57,179,000                                                                    
        trademarks and patents, net of accumulated amortization of 550 and 524 at january 31, 2023 and july 31, 2022, respectively
                   1,476,000                                                                    
        customer list, net of accumulated amortization of 7,685 and 7,608 at january 31, 2023 and july 31, 2022, respectively
                   100,000                                                                    
        notes payable, net of unamortized debt issuance costs of 191 and 202 at january 31, 2023 and july 31, 2022, respectively
                   31,809,000                                                                    
        total accumulated other comprehensive loss
                   -2,325,000 -2,576,000 -2,183,000 -4,225,000 -4,158,000 -4,124,000 -4,117,000 -11,240,000 -11,517,000 -11,854,000 -12,254,000 -9,595,000 -9,589,000 -14,812,000 -15,039,000 -10,185,000 -10,360,000 -10,512,000 -10,615,000 -11,995,000 -9,804,000 -10,185,000 -10,292,000 -13,206,000 -13,395,000 -13,767,000 -14,022,000 -8,646,000 -9,087,000 -9,078,000 -9,245,000 -8,392,000 -8,622,000 -8,363,000  -5,068,000 -5,218,000                                
        trademarks and patents, net of accumulated amortization of 527 and 524 at october 31, 2022 and july 31, 2022, respectively
                    1,465,000                                                                   
        customer list, net of accumulated amortization of 7,647 and 7,608 at october 31, 2022 and july 31, 2022, respectively
                    138,000                                                                   
        notes payable, net of unamortized debt issuance costs of 200 and 202 at october 31, 2022 and july 31, 2022, respectively
                    31,800,000                                                                   
        prepaid repairs expense
                     7,474,000   5,964,000 6,088,000 5,893,000 5,808,000 6,106,000 5,662,000 5,163,000 4,679,000 4,662,000 4,708,000 4,110,000 4,116,000 4,259,000 4,111,000 3,839,000 3,827,000 3,864,000 3,890,000 3,905,000 4,054,000 4,235,000 3,938,000 3,923,000 3,791,000 3,960,000 3,813,000 3,738,000 3,618,000 3,585,000 3,722,000 3,558,000 3,288,000 3,265,000 3,458,000 3,429,000 3,305,000 3,518,000 3,549,000 3,952,000 3,828,000 3,744,000 3,782,000 3,651,000 3,684,000 3,781,000 3,993,000 3,926,000 3,992,000 4,173,000 4,345,000              
        trademarks and patents, net of accumulated amortization of 524 and 385 in 2022 and 2021, respectively
                     1,445,000                                                                  
        customer list, net of accumulated amortization of 7,608 and 7,321 in 2022 and 2021, respectively
                     177,000                                                                  
        notes payable, net of unamortized debt issuance costs of 202 and 122 in 2022 and 2021, respectively
                     31,798,000                                                                  
        accumulated other comprehensive loss
                                                                                       
        other intangibles, net of accumulated amortization of 497 and 385 at april 30, 2022 and july 31, 2021, respectively
                      1,473,000                                                                 
        customer list, net of accumulated amortization of 7,536 and 7,321 at april 30, 2022 and july 31, 2021, respectively
                      249,000                                                                 
        notes payable, net of unamortized debt issuance costs of 212 and 122 at april 30, 2022 and july 31, 2021, respectively
                      32,788,000                                                                 
        other intangibles, net of accumulated amortization of 471 and 385 at january 31, 2022 and july 31, 2021, respectively
                       1,792,000                                                                
        customer list, net of accumulated amortization of 7,464 and 7,321 at january 31, 2022 and july 31, 2021, respectively
                       321,000                                                                
        notes payable, net of unamortized debt issuance costs of 222 and 122 at january 31, 2022 and july 31, 2021, respectively
                       32,778,000                                                                
        other intangibles, net of accumulated amortization of 421 and 385 at october 31, 2021 and july 31, 2021, respectively
                        1,768,000                                                               
        customer list, net of accumulated amortization of 7,392 and 7,321 at october 31, 2021 and july 31, 2021, respectively
                        393,000                                                               
        notes payable, net of unamortized debt issuance costs of 116 and 122 at october 31, 2021 and july 31, 2021, respectively
                        7,884,000                                                               
        trademarks and patents, net of accumulated amortization of 385 and 457 in 2021 and 2020, respectively
                         1,743,000                                                              
        customer list, net of accumulated amortization of 7,321 and 6,887 in 2021 and 2020, respectively
                         464,000                                                              
        notes payable, net of unamortized debt issuance costs of 122 and 150 in 2021 and 2020, respectively
                         7,878,000                                                              
        other intangibles, net of accumulated amortization of 540 and 457 at april 30, 2021 and july 31, 2020, respectively
                          1,761,000                                                             
        customer list, net of accumulated amortization of 7,212 and 6,887 at april 30, 2021 and july 31, 2020, respectively
                          573,000                                                             
        notes payable, net of unamortized debt issuance costs of 129 and 150 at april 30, 2021 and july 31, 2020, respectively
                          8,871,000                                                             
        other intangibles, net of accumulated amortization of 518 and 457 at january 31, 2021 and july 31, 2020, respectively
                           1,683,000                                                            
        customer list, net of accumulated amortization of 7,104 and 6,887 at january 31, 2021 and july 31, 2020, respectively
                           681,000                                                            
        notes payable, net of unamortized debt issuance costs of 136 and 150 at january 31, 2021 and july 31, 2020, respectively
                           8,864,000                                                            
        other intangibles, net of accumulated amortization of 483 and 457 at october 31, 2020 and july 31, 2020, respectively
                            1,625,000                                                           
        customer list, net of accumulated amortization of 6,995 and 6,887 at october 31, 2020 and july 31, 2020, respectively
                            790,000                                                           
        notes payable, net of unamortized debt issuance costs of 143 and 150 at october 31, 2020 and july 31, 2020, respectively
                            8,857,000                                                           
        trademarks and patents, net of accumulated amortization of 457 and 299 in 2020 and 2019, respectively
                             1,566,000                                                          
        customer list, net of accumulated amortization of 6,887 and 6,297 in 2020 and 2019, respectively
                             898,000                                                          
        salaries, wages and commissions
                             13,505,000 10,559,000 7,446,000 4,724,000 6,740,000 6,487,000 4,518,000 4,278,000 8,974,000 7,886,000 5,724,000 4,735,000 7,917,000 7,409,000 6,675,000 4,263,000 8,656,000 9,254,000 8,662,000 6,187,000 6,245,000 5,203,000 4,470,000 3,527,000 4,448,000 3,963,000 4,674,000 3,526,000 9,087,000 8,793,000 6,423,000 4,708,000 6,201,000 5,363,000 4,697,000 3,551,000 4,143,000 4,665,000 4,248,000 4,029,000 7,064,000 6,291,000 5,061,000 4,097,000 5,794,000 4,725,000 3,008,000 5,578,000 4,830,000 4,018,000 3,370,000 7,052,000 4,104,000 3,292,000 3,363,000 3,139,000 2,527,000 3,741,000 
        trade promotions and advertising
                             2,349,000 1,853,000 1,387,000 1,198,000 1,588,000 864,000 1,132,000 860,000 1,280,000 1,052,000 1,074,000 1,748,000 2,253,000 2,848,000 2,487,000 3,076,000 2,855,000 2,720,000 2,441,000 2,377,000 2,721,000 3,763,000 3,020,000 2,842,000 2,182,000 3,770,000 3,188,000 4,124,000 2,824,000 2,916,000 4,245,000 3,533,000 3,302,000 3,870,000 3,112,000 3,988,000 2,270,000 2,135,000 2,654,000 2,453,000 2,313,000 2,548,000 2,386,000 2,546,000 2,073,000 2,167,000 2,436,000 2,126,000 2,324,000 3,028,000 2,667,000 2,395,000 3,363,000 3,343,000 2,864,000 4,080,000 3,652,000 3,362,000 
        freight
                             1,313,000 2,216,000 1,862,000 1,818,000 2,635,000 3,831,000 5,302,000 4,170,000 1,767,000 1,468,000 950,000 1,187,000 1,606,000 2,203,000 1,699,000 1,378,000 1,579,000 2,118,000 2,326,000 1,963,000 1,874,000 2,313,000 2,750,000 2,446,000 2,504,000 2,797,000 2,480,000 2,274,000 2,154,000 2,285,000 1,990,000 1,982,000 2,585,000 1,693,000 1,596,000 1,762,000 2,135,000 1,947,000 1,649,000 1,517,000 1,504,000 2,038,000 1,725,000 1,650,000 1,073,000 1,564,000 2,185,000 2,345,000 1,960,000 1,524,000 1,815,000 1,305,000 1,312,000 1,257,000 1,372,000 1,572,000 1,395,000 1,386,000 
        real estate tax
                             1,658,000                                                          
        notes payable, net of unamortized debt issuance costs of 150 and 31 in 2020 and 2019, respectively
                             8,848,000                                                          
        other intangibles, net of accumulated amortization of 415 and 299 at april 30, 2020 and july 31, 2019, respectively
                              1,551,000                                                         
        customer list, net of accumulated amortization of 6,739 and 6,297 at april 30, 2020 and july 31, 2019, respectively
                              1,046,000                                                         
        current maturities of notes payable, net of unamortized debt issuance costs of 10 at april 30, 2020
                              3,074,000                                                         
        accrued expenses:
                                                                                       
        notes payable, net of unamortized debt issuance costs of 31 at july 31, 2019
                                                                                       
        other intangibles, net of accumulated amortization of 398 and 299 at january 31, 2020 and july 31, 2019, respectively
                               1,545,000                                                        
        customer list, net of accumulated amortization of 6,592 and 6,297 at january 31, 2020 and july 31, 2019, respectively
                               1,193,000                                                        
        current maturities of notes payable, net of unamortized debt issuance costs of 17 at january 31, 2020
                               3,067,000                                                        
        other intangibles, net of accumulated amortization of 371 and 299 at october 31, 2019 and july 31, 2019, respectively
                                1,551,000                                                       
        customer list, net of accumulated amortization of 6,444 and 6,297 at october 31, 2019 and july 31, 2019, respectively
                                1,341,000                                                       
        current maturities of notes payable, net of unamortized debt issuance costs of 24 at october 31, 2019
                                3,059,000                                                       
        short-term investments
                                  730,000 480,000 2,652,000 7,124,000 14,297,000 21,894,000 18,133,000 23,576,000 18,700,000 7,358,000 5,359,000 10,184,000 10,493,000 15,092,000 3,390,000 2,190,000 480,000 940,000 1,901,000 2,640,000 3,240,000 7,100,000 15,187,000 18,459,000                              
        trademarks and patents, net of accumulated amortization of 299 and 267 in 2019 and 2018, respectively
                                 1,599,000                                                      
        customer list, net of accumulated amortization of 6,297 and 5,540 in 2019 and 2018, respectively
                                 1,488,000                                                      
        notes payable, net of unamortized debt issuance costs of 31 and 60 in 2019 and 2018, respectively
                                 3,052,000                                                      
        trademarks and patents, net of accumulated amortization of 291 and 267 at april 30, 2019 and july 31, 2018, respectively
                                  1,356,000                                                     
        customer list, net of accumulated amortization of 6,107 and 5,540 at april 30, 2019 and july 31, 2018, respectively
                                  1,678,000                                                     
        notes payable, net of unamortized debt issuance costs of 39 and 60 at april 30, 2019 and july 31, 2018, respectively
                                  3,045,000                                                     
        trademarks and patents, net of accumulated amortization of 283 and 267 at january 31, 2019 and july 31, 2018, respectively
                                   1,298,000                                                    
        customer list, net of accumulated amortization of 5,918 and 5,540 at january 31, 2019 and july 31, 2018, respectively
                                   1,867,000                                                    
        notes payable, net of unamortized debt issuance costs of 46 and 60 at january 31, 2019 and july 31, 2018, respectively
                                   3,038,000                                                    
        trademarks and patents, net of accumulated amortization of 276 and 267 at october 31, 2018 and july 31, 2018, respectively
                                    1,253,000                                                   
        customer list, net of accumulated amortization of 5,729 and 5,540 at october 31, 2018 and july 31, 2018, respectively
                                    2,056,000                                                   
        notes payable, net of unamortized debt issuance costs of 53 and 60 at october 31, 2018 and july 31, 2018, respectively
                                    3,031,000                                                   
        trademarks and patents, net of accumulated amortization of 267 and 238 in 2018 and 2017, respectively
                                     1,220,000                                                  
        customer list, net of accumulated amortization of 5,540 and 4,601 in 2018 and 2017, respectively
                                     2,245,000                                                  
        notes payable, net of unamortized debt issuance costs of 60 and 89 in 2018 and 2017, respectively
                                     6,107,000                                                  
        trademarks and patents, net of accumulated amortization of 259 and 238 at april 30, 2018 and july 31, 2017, respectively
                                      1,306,000                                                 
        customer list, net of accumulated amortization of 5,305 and 4,601 at april 30, 2018 and july 31, 2017, respectively
                                      2,480,000                                                 
        short-term borrowing
                                      6,000,000                                                 
        notes payable, net of unamortized debt issuance costs of 68 and 89 at april 30, 2018 and july 31, 2017, respectively
                                      6,099,000                                                 
        trademarks and patents, net of accumulated amortization of 251 and 238 at january 31, 2018 and july 31, 2017, respectively
                                       1,300,000                                                
        customer list, net of accumulated amortization of 5,070 and 4,601 at january 31, 2018 and july 31, 2017, respectively
                                       2,715,000                                                
        notes payable, net of unamortized debt issuance costs of 75 and 89 at january 31, 2018 and july 31, 2017, respectively
                                       6,092,000                                                
        trademarks and patents, net of accumulated amortization of 244 and 238 at october 31, 2017 and july 31, 2017, respectively
                                        1,273,000                                               
        customer list, net of accumulated amortization of 4,835 and 4,601 at october 31, 2017 and july 31, 2017, respectively
                                        2,950,000                                               
        notes payable, net of unamortized debt issuance costs of 82 and 89 at october 31, 2017 and july 31, 2017, respectively
                                        6,085,000                                               
        trademarks and patents, net of accumulated amortization of 238 and 261 in 2017 and 2016, respectively
                                         1,223,000                                              
        customer list, net of accumulated amortization of 4,601 and 3,460 in 2017 and 2016, respectively
                                         3,184,000                                              
        notes payable, net of unamortized debt issuance costs of 89 and 118 in 2017 and 2016, respectively
                                         9,161,000                                              
        trademarks and patents, net of accumulated amortization of 287 and 261 at april 30, 2017 and july 31, 2016, respectively
                                          1,136,000                                             
        customer list, net of accumulated amortization of 4,315 and 3,460 at april 30, 2017 and july 31, 2016, respectively
                                          3,469,000                                             
        notes payable, net of unamortized debt issuance costs of 96 and 118 at april 30, 2017 and july 31, 2016, respectively
                                          9,154,000                                             
        trademarks and patents, net of accumulated amortization of 279 and 261 at january 31, 2017 and july 31, 2016, respectively
                                           999,000                                            
        customer list, net of accumulated amortization of 4,031 and 3,460 at january 31, 2017 and july 31, 2016, respectively
                                           3,754,000                                            
        notes payable, net of unamortized debt issuance costs of 103 and 118 at january 31, 2017 and july 31, 2016, respectively
                                           9,147,000                                            
        trademarks and patents, net of accumulated amortization of 269 and 261 at october 31, 2016 and july 31, 2016, respectively
                                            979,000                                           
        customer list, net of accumulated amortization of 3,745 and 3,460 at october 31, 2016 and july 31, 2016, respectively
                                            4,040,000                                           
        notes payable, net of unamortized debt issuance costs of 110 and 118 at october 31, 2016 and july 31, 2016, respectively
                                            9,140,000                                           
        trademarks and patents, net of accumulated amortization of 261 and 301 in 2016 and 2015, respectively
                                             916,000                                          
        debt issuance costs, net of accumulated amortization of 161 and 133 in 2016 and 2015, respectively
                                             118,000                                          
        customer list, net of accumulated amortization of 3,460 and 2,094 in 2016 and 2015, respectively
                                             4,325,000                                          
        notes payable
                                             12,333,000 12,333,000 12,333,000 12,333,000 15,417,000 15,417,000 15,417,000 15,417,000 18,900,000 18,900,000 18,900,000 18,900,000 22,400,000 22,400,000 22,400,000 22,400,000 25,900,000 25,900,000 27,400,000 27,400,000 29,700,000 29,700,000 31,200,000 12,700,000 14,800,000 14,800,000 16,800,000 16,800,000 18,300,000 18,300,000 21,300,000 21,500,000 21,500,000 23,000,000 23,000,000 27,080,000 31,080,000 31,080,000 31,160,000 35,160,000 20,160,000 20,240,000 
        trademarks and patents, net of accumulated amortization of 319 and 301 at april 30, 2016 and july 31, 2015, respectively
                                              906,000                                         
        debt issuance costs, net of accumulated amortization of 154 and 133 at april 30, 2016 and july 31, 2015, respectively
                                              125,000                                         
        customer list, net of accumulated amortization of 3,119 and 2,094 at april 30, 2016 and july 31, 2015, respectively
                                              4,666,000                                         
        trademarks and patents, net of accumulated amortization of 313 and 301 at january 31, 2016 and july 31, 2015, respectively
                                               879,000                                        
        debt issuance costs, net of accumulated amortization of 147 and 133 at january 31, 2016 and july 31, 2015, respectively
                                               132,000                                        
        customer list, net of accumulated amortization of 2,777 and 2,094 at january 31, 2016 and july 31, 2015, respectively
                                               5,008,000                                        
        trademarks and patents, net of accumulated amortization of 307 and 301 at october 31, 2015 and july 31, 2015, respectively
                                                822,000                                       
        debt issuance costs, net of accumulated amortization of 140 and 133 at october 31, 2015 and july 31, 2015, respectively
                                                139,000                                       
        customer list, net of accumulated amortization of 2,436 and 2,094 at october 31, 2015 and july 31, 2015, respectively
                                                5,349,000                                       
        restricted unearned stock compensation
                                                -4,658,000 -931,000 -1,223,000 -1,829,000 -2,120,000 -2,225,000 -2,571,000 -2,277,000 -2,595,000 -1,824,000 -2,072,000 -1,969,000 -2,179,000 -2,214,000 -2,422,000 -2,173,000 -2,342,000 -2,446,000 -2,608,000 -2,724,000 -2,911,000 -156,000 -234,000 -310,000 -389,000 -383,000 -455,000 -599,000 -674,000 -747,000 -824,000 -908,000 -991,000 -1,144,000 -1,226,000 -1,390,000 -68,000 -81,000 -75,000 
        restricted cash
                                                    100,000 129,000 191,000 500,000                                
        trademarks and patents, net of accumulated amortization of 301 and 420 in 2015 and 2014, respectively
                                                 818,000                                      
        debt issuance costs, net of accumulated amortization of 133 and 522 in 2015 and 2014, respectively
                                                 146,000                                      
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,145 in 2014
                                                                                       
        customer list, net of accumulated amortization of 2,094 and 764 in 2015 and 2014, respectively
                                                 5,691,000                                      
        unrealized gain on marketable securities
                                                     114,000 114,000 84,000 78,000 86,000 74,000 71,000 75,000 72,000 78,000 66,000 70,000 71,000 86,000 68,000 63,000 67,000 64,000 55,000 57,000 40,000 41,000 52,000 68,000 62,000 50,000 85,000 59,000 61,000 53,000 58,000 54,000 40,000 38,000 
        trademarks and patents, net of accumulated amortization of 316 and 420 at april 30, 2015 and july 31, 2014, respectively
                                                  903,000                                     
        debt issuance costs, net of accumulated amortization of 432 and 522 at april 30, 2015 and july 31 2014, respectively
                                                  170,000                                     
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,285 and 1,145 at april 30, 2015 and july 31, 2014, respectively
                                                  15,000                                     
        customer list, net of accumulated amortization of 1,762 and 764 at april 30, 2015 and july 31, 2014, respectively
                                                  6,023,000                                     
        accumulated other comprehensive income:
                                                                                       
        trademarks and patents, net of accumulated amortization of 309 and 420 at january 31, 2015 and july 31, 2014, respectively
                                                   751,000                                    
        debt issuance costs, net of accumulated amortization of 407 and 522 at january 31, 2015 and july 31 2014, respectively
                                                   194,000                                    
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,238 and 1,145 at january 31, 2015 and july 31, 2014, respectively
                                                   62,000                                    
        customer list, net of accumulated amortization of 1,428 and 764 at january 31, 2015 and july 31, 2014, respectively
                                                   6,356,000                                    
        trademarks and patents, net of accumulated amortization of 303 and 420 at october 31, 2014 and july 31, 2014, respectively
                                                    694,000                                   
        debt issuance costs, net of accumulated amortization of 383 and 522 at october 31, 2014 and july 31 2014, respectively
                                                    219,000                                   
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,192 and 1,145 at october 31, 2014 and july 31, 2014, respectively
                                                    108,000                                   
        customer list, net of accumulated amortization of 1,097 at october 31, 2014 and 764 at july 31, 2014, respectively
                                                    6,688,000                                   
        trademarks and patents, net of accumulated amortization of 420 and 427 in 2014 and 2013, respectively
                                                     660,000                                  
        debt issuance costs, net of accumulated amortization of 522 and 455 in 2014 and 2013, respectively
                                                     243,000                                  
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,145 and 1,861 in 2014 and 2013, respectively
                                                     155,000                                  
        customer list, net of accumulated amortization of 764 in 2014
                                                     7,020,000                                  
        trademarks and patents, net of accumulated amortization of 415 and 427 at april 30, 2014 and july 31, 2013, respectively
                                                      635,000                                 
        debt issuance costs, net of accumulated amortization of 505 and 455 at april 30, 2014 and july 31 2013, respectively
                                                      259,000                                 
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,099 and 1,861 at april 30, 2014 and july 31, 2013, respectively
                                                      201,000                                 
        customer list, net of accumulated amortization of 510 at april 30, 2014
                                                      7,275,000                                 
        trademarks and patents, net of accumulated amortization of 439 and 427 at january 31, 2014 and july 31, 2013, respectively
                                                       661,000                                
        debt issuance costs, net of accumulated amortization of 488 and 455 at january 31, 2014 and july 31 2013, respectively
                                                       277,000                                
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,986 and 1,861 at january 31, 2014 and july 31, 2013, respectively
                                                       253,000                                
        customer list, net of accumulated amortization of 255 at january 31, 2014
                                                       7,530,000                                
        trademarks and patents, net of accumulated amortization of 433 and 427 at october 31, 2013 and july 31, 2013, respectively
                                                        577,000                               
        debt issuance costs, net of accumulated amortization of 472 and 455 at october 31, 2013 and july 31 2013, respectively
                                                        293,000                               
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,924 and 1,861 at october 31, 2013 and july 31, 2013, respectively
                                                        316,000                               
        trademarks and patents, net of accumulated amortization of 427 and 409 in 2013 and 2012, respectively
                                                         581,000                              
        debt issuance costs, net of accumulated amortization of 455 and 380 in 2013 and 2012, respectively
                                                         309,000                              
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,861 and 1,611 in 2013 and 2012, respectively
                                                         378,000                              
        investment in short-term securities
                                                          17,446,000 10,388,000 7,940,000 9,163,000 9,043,000 8,965,000 8,390,000 15,837,000 20,753,000 21,375,000 3,854,000 5,859,000                  
        trademarks and patents, net of accumulated amortization of 420 and 409 at april 30, 2013 and july 31, 2012, respectively
                                                          590,000                             
        debt issuance costs, net of accumulated amortization of 436 and 380 at april 30, 2013 and july 31 2012, respectively
                                                          329,000                             
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,799 and 1,611 at april 30, 2013 and july 31, 2012, respectively
                                                          440,000                             
        trademarks and patents, net of accumulated amortization of 414 and 409 at january 31, 2013 and july 31, 2012, respectively
                                                           591,000                            
        debt issuance costs, net of accumulated amortization of 417 and 380 at january 31, 2013 and july 31 2012, respectively
                                                           348,000                            
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,736 and 1,611 at january 31, 2013 and july 31, 2012, respectively
                                                           503,000                            
        trademarks and patents, net of accumulated amortization of 407 and 409 at october 31, 2012 and july 31, 2012, respectively
                                                            594,000                           
        debt issuance costs, net of accumulated amortization of 398 and 380 at october 31, 2012 and july 31 2012, respectively
                                                            367,000                           
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,674 and 1,611 at october 31, 2012 and july 31, 2012, respectively
                                                            564,000                           
        trademarks and patents, net of accumulated amortization of 409 and 381 in 2012 and 2011, respectively
                                                             576,000                          
        debt issuance costs, net of accumulated amortization of 380 and 333 in 2012 and 2011, respectively
                                                             385,000                          
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,611 and 1,361 in 2012 and 2011, respectively
                                                             627,000                          
        trademarks and patents, net of accumulated amortization of 401 and 381 at april 30, 2012 and july 31, 2011, respectively
                                                              569,000                         
        debt issuance costs, net of accumulated amortization of 392 and 333 at april 30, 2012 and july 31 2011, respectively
                                                              404,000                         
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,548 and 1,361 at april 30, 2012 and july 31, 2011, respectively
                                                              690,000                         
        trademarks and patents, net of accumulated amortization of 394 and 381 at january 31, 2012 and july 31, 2011, respectively
                                                               576,000                        
        debt issuance costs, net of accumulated amortization of 373 and 333 at january 31, 2012 and july 31 2011, respectively
                                                               423,000                        
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,486 and 1,361 at january 31, 2012 and july 31, 2011, respectively
                                                               752,000                        
        trademarks and patents, net of accumulated amortization of 388 and 381 at october 31, 2011 and july 31, 2011, respectively
                                                                582,000                       
        debt issuance costs, net of accumulated amortization of 353 and 333 at october 31, 2011 and july 31 2011, respectively
                                                                443,000                       
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,423 and 1,361 at october 31, 2011 and july 31, 2011, respectively
                                                                815,000                       
        property, plant and equipment - sum
                                                                 164,183,000    151,230,000                  
        trademarks and patents, net of accumulated amortization of 381 and 357 in 2011 and 2010, respectively
                                                                 589,000                      
        debt issuance costs, net of accumulated amortization of 333 and 524 in 2011 and 2010, respectively
                                                                 463,000                      
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,361 and 3,611 in 2011 and 2010, respectively
                                                                 878,000                      
        trademarks and patents, net of accumulated amortization of 374 and 357 at april 30, 2011 and july 31, 2010, respectively
                                                                  596,000                     
        debt issuance costs, net of accumulated amortization of 391 and 524 at april 30, 2011 and july 31 2010, respectively
                                                                  437,000                     
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,298 and 3,611 at april 30, 2011 and july 31, 2010, respectively
                                                                  940,000                     
        trademarks and patents, net of accumulated amortization of 367 and 357 at january 31, 2011 and july 31, 2010, respectively
                                                                   603,000                    
        debt issuance costs, net of accumulated amortization of 372 and 524 at january 31, 2011 and july 31, 2010, respectively
                                                                   502,000                    
        licensing agreements and non-compete agreements, net of accumulated amortization of 1,236 and 3,611 at january 31, 2011 and july 31, 2010, respectively
                                                                   1,003,000                    
        the accompanying notes are an integral part of the condensed consolidated financial statements.
                                                                                       
        condensed consolidated balance sheets
                                                                                       
        7,679,721 shares at january 31, 2011 and 7,639,922 shares at july 31, 2010
                                                                   768,000                    
        2,374,150 shares at january 31, 2011 and 2,244,217 shares at july 31, 2010
                                                                   237,000                    
        less treasury stock, at cost (2,630,169 common and 324,741
                                                                                       
        class b shares at january 31, 2011 and 2,558,764 common and
                                                                                       
        324,741 class b shares at july 31, 2010)
                                                                   -49,178,000 -47,706,000                   
        572 at october 31, 2010 and july 31, 2010, respectively
                                                                    28,037,000                   
        trademarks and patents, net of accumulated amortization
                                                                                       
        of 364 and 357 at october 31, 2010 and july 31, 2010, respectively
                                                                    609,000                   
        debt issuance costs, net of accumulated amortization
                                                                                       
        of 353 and 524 at october 31, 2010 and july 31, 2010, respectively
                                                                    241,000                   
        licensing agreements and non-compete agreements, net of
                                                                                       
        accumulated amortization of 1,173 and 3,611 at october 31, 2010 and july 31, 2010, respectively
                                                                    1,067,000                   
        oil-dri corporation of america & subsidiaries
                                                                                       
        7,662,221 shares at october 31, 2010 and 7,639,922 shares at july 31, 2010
                                                                    767,000                   
        2,374,150 shares at october 31, 2010 and 2,244,217 shares at july 31, 2010
                                                                    237,000                   
        less treasury stock, at cost (2,563,821 common and 324,741
                                                                                       
        class b shares at october 31, 2010 and 2,558,764 common and
                                                                                       
        in 2010 and 2009, respectively
                                                                     27,178,000                  
        trademarks and patents (net of accumulated amortization
                                                                                       
        of 357 and 351 in 2010 and 2009, respectively)
                                                                     617,000                  
        debt issuance costs (net of accumulated amortization
                                                                                       
        of 524 and 473 in 2010 and 2009, respectively)
                                                                     255,000                  
        licensing and non-compete agreements (net of accumulated amortization
                                                                                       
        of 3,611 and 3,361 in 2010 and 2009, respectively)
                                                                     1,127,000                  
        shares in 2010 and 7,475,171 in 2009
                                                                     764,000                  
        shares in 2010 and 2,240,201 in 2009
                                                                     224,000                  
        less treasury stock, at cost (2,558,764 common and
                                                                                       
        324,741 class b shares at july 31, 2010 and 2,282,521
                                                                                       
        common and 324,741 class b shares at july 31, 2009)
                                                                     -47,513,000                  
        investment in securities
                                                                      3,999,000 5,999,000 8,997,000  3,996,000 15,463,000  18,935,000 24,355,000         
        652 at april 30, 2010 and july 31, 2009, respectively
                                                                      26,721,000                 
        of 359 and 351 at april 30, 2010 and july 31, 2009, respectively
                                                                      627,000                 
        of 511 and 473 at april 30, 2010 and july 31, 2009, respectively
                                                                      268,000                 
        accumulated amortization of 3,548 and 3,361 at april 30, 2010 and july 31, 2009, respectively
                                                                      1,190,000                 
        7,618,991 shares at april 30, 2010 and 7,475,171 shares at july 31, 2009
                                                                      762,000                 
        2,244,217 shares at april 30, 2010 and 2,240,201 shares at july 31, 2009
                                                                      224,000                 
        less treasury stock, at cost (2,386,650 common and 324,741
                                                                                       
        class b shares at april 30, 2010 and 2,282,521 common and
                                                                                       
        324,741 class b shares at july 31, 2009)
                                                                      -43,620,000 -42,195,000                
        652 at january 31, 2010 and july 31, 2009, respectively
                                                                       27,210,000                
        of 366 and 351 at january 31, 2010 and july 31, 2009, respectively
                                                                       634,000                
        of 498 and 473 at january 31, 2010 and july 31, 2009, respectively
                                                                       281,000                
        accumulated amortization of 3,486 and 3,361 at january 31, 2010 and july 31, 2009, respectively
                                                                       1,253,000                
        7,516,458 shares at january 31, 2010 and 7,475,171 shares at july 31, 2009
                                                                       752,000                
        2,244,217 shares at january 31, 2010 and 2,240,201 shares at july 31, 2009
                                                                       224,000                
        less treasury stock, at cost (2,312,521 common and 324,741
                                                                                       
        class b shares at january 31, 2010 and 2,282,521 common and
                                                                                       
        trademarks and patents, net of accumulated amortization of 359 and 351 at october 31, 2009 and july 31, 2009, respectively
                                                                        641,000               
        debt issuance costs, net of accumulated amortization of 485 and 473 at october 31, 2009 and july 31, 2009, respectively
                                                                        294,000               
        licensing agreements and non-compete agreements, net of accumulated amortization of 3,423 and 3,361 at october 31, 2009 and july 31, 2009, respectively
                                                                        1,315,000               
        investment in treasury securities
                                                                         7,998,000   20,916,000   22,350,000 17,894,000 18,846,000 16,851,000 18,673,000 21,704,000 11,485,000 13,098,000 
        in 2009 and 2008, respectively
                                                                         29,000,000              
        property, plant and equipment, at cost
                                                                                       
        property, plant and equipment, at cost - sum
                                                                         148,409,000   142,018,000    138,830,000       
        of 351 and 349 in 2009 and 2008, respectively)
                                                                         649,000              
        of 473 and 525 in 2009 and 2008, respectively)
                                                                         306,000              
        of 3,361 and 2,987 in 2009 and 2008, respectively)
                                                                         1,378,000              
        shares in 2009 and 7,392,475 in 2008
                                                                         747,000              
        shares in 2009 and 2,239,538 in 2008
                                                                         224,000              
        less treasury stock, at cost (2,282,521 common and
                                                                                       
        324,741 class b shares at july 31, 2009 and 2,261,942
                                                                                       
        common and 324,741 class b shares at july 31, 2008)
                                                                         -41,722,000              
        614 at april 30, 2009 and july 31, 2008, respectively
                                                                          28,711,000             
        of 371 and 349 at april 30, 2009 and july 31, 2008, respectively
                                                                          666,000             
        of 460 and 525 at april 30, 2009 and july 31, 2008, respectively
                                                                          319,000             
        accumulated amortization of 3,276 and 2,987 at april 30, 2009 and july 31, 2008, respectively
                                                                          1,463,000             
        7,438,301 shares at april 30, 2009 and 7,392,475 shares at july 31, 2008
                                                                          744,000             
        2,239,538 shares at april 30, 2009 and 2,239,538 shares at july 31, 2008
                                                                          224,000             
        less treasury stock, at cost (2,285,521 common and 324,741
                                                                                       
        class b shares at april 30, 2009 and 2,261,942 common and
                                                                                       
        324,741 class b shares at july 31, 2008)
                                                                          -41,771,000 -41,892,000            
        614 at october 31, 2008 and july 31, 2008, respectively
                                                                           32,763,000            
        of 356 and 349 at october 31, 2008 and july 31, 2008, respectively
                                                                           734,000            
        of 544 and 525 at october 31, 2008 and july 31, 2008, respectively
                                                                           319,000            
        accumulated amortization of 3,083 and 2,987 at october 31, 2008 and july 31, 2008, respectively
                                                                           1,656,000            
        7,404,200 shares at october 31, 2008 and 7,392,475 shares at july 31, 2008
                                                                           740,000            
        2,239,538 shares at october 31, 2008 and 2,239,538 shares at july 31, 2008
                                                                           224,000            
        less treasury stock, at cost (2,292,976 common and 324,741
                                                                                       
        class b shares at october 31, 2008 and 2,261,942 common and
                                                                                       
        in 2008 and 2007, respectively
                                                                            31,383,000           
        of 349 and 327 in 2008 and 2007, respectively)
                                                                            733,000           
        of 525 and 450 in 2008 and 2007, respectively)
                                                                            338,000           
        of 2,987 and 2,757 in 2008 and 2007, respectively)
                                                                            1,752,000           
        liabilities and stockholders' equity
                                                                                       
        shares in 2008 and 7,270,167 in 2007
                                                                            739,000           
        shares in 2008 and 2,234,538 in 2007
                                                                            224,000           
        less treasury stock, at cost (2,261,942 common and
                                                                                       
        324,741 class b shares at july 31, 2008 and 2,286,226
                                                                                       
        common and 324,741 class b shares at july 31, 2007)
                                                                            -41,406,000           
        total liabilities and stockholders' equity
                                                                            148,988,000    142,087,000       
        trademarks and patents, net of accumulated amortization of 345 and 327 at april 30, 2008 and july 31, 2007, respectively
                                                                             834,000          
        debt issuance costs, net of accumulated amortization of 507 and 450 at april 30, 2008 and july 31, 2007, respectively
                                                                             356,000          
        licensing agreements, net of accumulated amortization of 2,906 and 2,757 at april 30, 2008 and july 31, 2007, respectively
                                                                             533,000          
        trademarks and patents, net of accumulated amortization of 339 and 327 at january 31, 2008 and july 31, 2007, respectively
                                                                              817,000         
        debt issuance costs, net of accumulated amortization of 487 and 450 at january 31, 2008 and july 31, 2007, respectively
                                                                              376,000         
        licensing agreements, net of accumulated amortization of 2,857 and 2,757 at january 31, 2008 and july 31, 2007, respectively
                                                                              582,000         
        569 at october 31, 2007 and july 31, 2007, respectively
                                                                               27,579,000        
        of 333 and 327 at october 31, 2007 and july 31, 2007, respectively
                                                                               847,000        
        of 468 and 450 at october 31, 2007 and july 31, 2007, respectively
                                                                               395,000        
        licensing agreements, net of accumulated amortization
                                                                                       
        of 2,807 and 2,757 at october 31, 2007 and july 31, 2007, respectively
                                                                               632,000        
        7,337,325 shares at october 31, 2007 and 7,270,167 shares at july 31, 2007
                                                                               734,000        
        2,234,538 shares at october 31, 2007 and 2,234,538 shares at july 31, 2007
                                                                               223,000        
        less treasury stock, at cost (2,286,226 common and 324,741
                                                                                       
        class b shares at october 31, 2007 and 2,286,226 common and
                                                                                       
        324,741 class b shares at july 31, 2007)
                                                                               -41,793,000        
        in 2007 and 2006, respectively
                                                                                27,933,000       
        prepaid overburden removal expense
                                                                                   1,503,000 1,498,000 1,526,000 1,370,000 
        of 327 and 308 in 2007 and 2006, respectively)
                                                                                817,000       
        of 450 and 393 in 2007 and 2006, respectively)
                                                                                413,000       
        licensing agreements (net of accumulated amortization
                                                                                       
        of 2,757 and 2,558 in 2007 and 2006, respectively)
                                                                                682,000       
        shares in 2007 and 7,158,158 in 2006
                                                                                727,000       
        shares in 2007 and 2,234,544 in 2006
                                                                                223,000       
        adoption of fas 158
                                                                                857,000       
        less treasury stock, at cost (2,286,226 common and
                                                                                       
        324,741 class b shares at july 31, 2007 and 2,304,103
                                                                                       
        common and 324,741 class b shares at july 31, 2006)
                                                                                -41,793,000       
        trademarks and patents, net of accumulated amortization of 321 and 308 at january 31, 2007 and july 31, 2006, respectively
                                                                                 787,000      
        debt issuance costs, net of accumulated amortization of 414 and 393 at january 31, 2007 and july 31, 2006, respectively
                                                                                 427,000      
        licensing agreements, net of accumulated amortization of 2,657 and 2,558 at january 31, 2007 and july 31, 2006, respectively
                                                                                 782,000      
        trademarks and patents, net of accumulated amortization of 314 and 308 at october 31, 2006 and july 31, 2006, respectively
                                                                                  789,000     
        debt issuance costs, net of accumulated amortization of 404 and 393 at october 31, 2006 and july 31, 2006, respectively
                                                                                  437,000     
        licensing agreements, net of accumulated amortization of 2,608 and 2,558 at october 31, 2006 and july 31, 2006, respectively
                                                                                  831,000     
        investment in debt securities
                                                                                   302,000 908,000 1,028,000 392,000 
        trademarks and patents, net of accumulated amortization of 300 and 305 at april 30, 2006 and july 31, 2005, respectively
                                                                                   781,000    
        debt issuance costs, net of accumulated amortization of 382 and 356 at april 30, 2006 and july 31, 2005, respectively
                                                                                   455,000    
        licensing agreements, net of accumulated amortization of 2,510 and 2,359 at april 30, 2006 and july 31, 2005, respectively
                                                                                   929,000    
        trademarks and patents, net of accumulated amortization of 296 and 305 at january 31, 2006 and july 31, 2005, respectively
                                                                                    779,000   
        debt issuance costs, net of accumulated amortization of 364 and 356 at january 31, 2006 and july 31, 2005, respectively
                                                                                    420,000   
        licensing agreements, net of accumulated amortization of 2,459 and 2,359 at january 31, 2006 and july 31, 2005, respectively
                                                                                    980,000   
        intangibles, net of accumulated amortization of 3,058 and 3,019 at october 31, 2005 and july 31, 2005, respectively
                                                                                     1,911,000  
        intangibles
                                                                                      1,965,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-04-30 2026-01-31 2025-10-31 2025-07-31 2025-04-30 2025-01-31 2024-10-31 2024-07-31 2024-04-30 2024-01-31 2023-10-31 2023-07-31 2023-04-30 2023-01-31 2022-10-31 2022-07-31 2022-04-30 2022-01-31 2021-10-31 2021-07-31 2021-04-30 2021-01-31 2020-10-31 2020-07-31 2020-04-30 2020-01-31 2019-10-31 2019-07-31 2019-04-30 2019-01-31 2018-10-31 2018-07-31 2018-04-30 2018-01-31 2017-10-31 2017-07-31 2017-04-30 2017-01-31 2016-10-31 2016-07-31 2016-04-30 2016-01-31 2015-10-31 2015-07-31 2015-04-30 2015-01-31 2014-10-31 2014-07-31 2014-04-30 2014-01-31 2013-10-31 2013-07-31 2013-04-30 2013-01-31 2012-10-31 2012-07-31 2012-04-30 2012-01-31 2011-10-31 2011-07-31 2011-04-30 2011-01-31 2010-10-31 2010-07-31 2010-04-30 2010-01-31 2009-10-31 2009-07-31 2009-04-30 2009-01-31 2008-10-31 2008-07-31 2008-04-30 2008-01-31 2007-10-31 2007-07-31 2007-04-30 2007-01-31 2006-10-31 2006-07-31 2006-04-30 2006-01-31 2005-10-31 
                                                                                           
          net income
        14,526,000 12,569,000 15,456,000 13,055,000 11,644,000 12,921,000 16,376,000 8,525,000 7,777,000 12,382,000 10,742,000 11,919,000 8,488,000 3,846,000 5,230,000 5,189,000 -2,133,000 1,961,000 595,000 557,000 2,186,000 4,288,000 3,949,000 5,881,000 4,650,000 4,749,000 3,460,000 3,838,000 5,561,000 2,282,000 934,000 2,683,000 3,585,000 -1,096,000 3,050,000 1,322,000 3,211,000 4,250,000 2,009,000 5,261,000 -892,000 3,821,000 5,423,000 5,066,000 1,385,000 2,797,000 2,120,000 466,000 722,000 4,281,000 2,887,000 4,737,000 3,251,000 2,146,000 4,452,000 -108,000 1,892,000 3,239,000 1,075,000 2,895,000 1,860,000 1,777,000 2,519,000 2,416,000 2,586,000 2,262,000 2,194,000 2,552,000 2,416,000 2,372,000 2,246,000 2,453,000 2,013,000 2,089,000 2,484,000 2,051,000 1,999,000 1,963,000 1,647,000  1,223,000 1,867,000 1,028,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                           
          depreciation and amortization
        5,708,000 5,673,000 5,805,000 5,651,000 5,574,000 5,436,000 5,381,000 5,662,000 4,765,000 4,486,000 4,368,000 4,180,000 4,074,000 3,751,000 3,523,000 3,440,000 3,261,000 3,317,000 3,456,000 3,524,000 3,588,000 3,561,000 3,504,000 3,524,000 3,470,000 3,460,000 3,469,000 3,481,000 3,310,000 3,234,000 3,305,000 3,179,000 3,164,000 3,221,000 3,192,000 3,219,000 3,164,000 3,230,000 3,159,000 3,201,000 3,077,000 2,975,000 2,939,000 3,039,000 3,019,000 3,016,000 2,920,000 2,789,000 2,747,000 2,629,000 2,231,000 2,251,000 2,220,000 2,220,000 2,255,000 2,332,000 2,306,000 2,289,000 2,345,000 2,161,000 2,130,000 2,128,000 2,054,000 1,859,000 1,801,000 1,822,000 1,889,000 1,979,000 1,743,000 1,799,000 1,885,000 1,859,000 1,861,000 1,873,000 1,862,000 1,951,000 1,875,000 1,848,000 1,824,000  1,777,000 1,810,000 1,797,000 
          non-cash stock-based compensation
        1,272,000 1,357,000 1,448,000  1,338,000 1,390,000 1,152,000  1,237,000 1,246,000 1,108,000  692,000 840,000 794,000  814,000 817,000 636,000                                                                 
          provision for bad debts and cash discounts
        -49,000 80,000 -200,000  21,000 -213,000 628,000  23,000 -44,000 28,000 44,000 33,000 152,000 55,000 -226,000 58,000 -148,000 89,000 254,000 -69,000 22,000 -60,000 -281,000 483,000 32,000 189,000 -28,000 17,000 -125,000 -43,000 67,000 30,000 177,000 -22,000 -45,000 -99,000 83,000 48,000 -99,000 18,000 153,000 -22,000 -38,000 42,000 129,000 44,000                                     
          loss on impairment of patent applications
           1,000 -1,000 1,000 48,000                                                                            
          accretion of asset retirement obligation
        64,000 64,000 62,000  48,000 48,000 47,000  53,000 52,000 53,000                                                                         
          loss on the disposals of property, plant and equipment
        61,000 95,000 257,000  -66,000 15,000 80,000  33,000 115,000 26,000 84,000 31,000 -39,000 54,000 -12,000 81,000 231,000 34,000                                                                 
          decrease in assets:
                                                                                           
          accounts receivable
        -5,566,000 -3,714,000 3,077,000 -3,973,000 608,000 4,596,000 -9,020,000 2,246,000 -729,000 1,423,000 -1,487,000 -2,295,000 134,000 -4,116,000 -1,622,000 -8,201,000 2,570,000 -2,773,000 -2,250,000 -2,091,000 -66,000 398,000 -4,196,000 7,284,000 -6,862,000 546,000 -980,000 456,000 2,344,000 1,838,000 -6,367,000 -557,000 -327,000 -356,000 718,000 -666,000 164,000 -1,141,000 -688,000 -1,198,000 1,619,000 935,000 -414,000 537,000 248,000 -491,000 -940,000 1,824,000 4,177,000 -5,315,000 -604,000 -1,369,000 1,197,000 375,000 -1,187,000 283,000 -1,574,000 2,367,000 -2,102,000 -2,942,000 700,000 1,064,000 -897,000 -413,000 455,000 -1,644,000 3,486,000 -269,000 2,712,000 1,328,000 -1,417,000 -253,000 -1,126,000 -2,454,000 295,000 -605,000 -526,000 -1,094,000 84,000  2,404,000 -4,215,000 -496,000 
          inventories
        1,292,000 3,024,000 -5,082,000 4,883,000 -1,153,000 639,000 -2,033,000 -1,710,000 694,000 -2,292,000 -1,374,000 -995,000 1,223,000 2,632,000 -5,064,000 -653,000 -5,220,000 -1,152,000 -5,084,000 -6,000 112,000 -50,000 462,000 285,000 -1,580,000 1,137,000 371,000 2,555,000 1,359,000 -2,674,000 -2,933,000 1,008,000 -858,000 229,000 -154,000 1,283,000 -628,000 378,000 -367,000 1,699,000 -1,979,000 -1,548,000 -126,000 2,916,000 -624,000 671,000 151,000 -82,000 -1,537,000 274,000 -1,621,000 626,000 837,000 -1,188,000 -1,325,000 -297,000 2,251,000 623,000 -3,033,000 -899,000 -1,077,000 42,000 -1,273,000 1,367,000 -405,000 -587,000 1,397,000 2,341,000 -901,000 598,000 -2,089,000 -803,000 -545,000 1,140,000 -2,299,000 -513,000 -295,000 1,518,000 -250,000  -637,000 -1,217,000 -1,541,000 
          prepaid expenses
        368,000 -1,292,000 1,387,000 -1,043,000 215,000 -1,209,000 2,228,000 1,277,000 -491,000 -3,371,000 154,000 -218,000 1,308,000 481,000 -489,000 -1,195,000 -665,000 693,000 153,000 -1,950,000 -1,357,000 -1,218,000 458,000 -1,069,000 -1,441,000 -17,000 1,578,000 -585,000 -1,171,000 2,166,000 -1,196,000 -765,000 9,000 1,310,000 -1,361,000 -77,000 2,613,000 -2,727,000 -1,057,000 760,000 2,078,000 -1,809,000 -862,000 800,000 27,000 320,000 1,308,000 -712,000 -551,000 -229,000 -496,000 561,000 -24,000 332,000 547,000 -181,000 -358,000 1,702,000 715,000 -2,610,000 54,000 -4,000 -394,000 63,000 333,000 328,000 -219,000 -117,000 -215,000 -294,000 -509,000 215,000 426,000 -542,000 -654,000 565,000 201,000 -12,000 -442,000  -269,000 100,000 -1,123,000 
          deferred income taxes
        -271,000 -94,000 438,000 147,000 -226,000 -352,000 462,000 -199,000 -297,000 207,000 174,000 1,252,000 -908,000 -2,000 168,000 2,026,000 -1,343,000 -168,000 200,000 1,720,000 -26,000 28,000 714,000 -914,000 1,055,000 343,000 -31,000 -683,000 171,000 53,000 53,000 1,028,000 930,000 5,201,000 111,000 1,877,000 177,000 189,000 165,000 -8,394,000 91,000 80,000 109,000 -2,881,000 265,000 94,000 72,000 -492,000 697,000 42,000 37,000 837,000 -1,419,000 92,000 92,000 -2,671,000 38,000 36,000 29,000 3,399,000 43,000 36,000 37,000 -1,867,000 37,000 34,000 33,000 -2,244,000 10,000 6,000 -11,000 -363,000 6,000 -11,000 21,000 857,000 -90,000 -7,000 1,000  2,000 3,000 3,000 
          other assets
        1,012,000 1,271,000 1,808,000 1,083,000 918,000 1,132,000 962,000 2,491,000 602,000 -30,000 341,000 -2,589,000 618,000 323,000 1,707,000 1,167,000 337,000 448,000 186,000 1,610,000 -800,000 719,000 -985,000 -2,058,000 85,000 415,000 316,000 -53,000 -142,000 -341,000 -81,000 166,000 -87,000 -20,000 75,000 -25,000 -513,000 -42,000 -114,000 267,000 -152,000 -71,000 -47,000 151,000 -233,000 -32,000 -1,173,000 -373,000 -132,000 -308,000 -4,000 -809,000 -240,000 -18,000 42,000 -101,000 -60,000 -54,000 -295,000 -80,000 201,000 -251,000 20,000 -25,000 162,000 190,000 139,000 885,000 279,000 -240,000 -1,081,000 -236,000 -970,000 -334,000 514,000 777,000 245,000 -236,000 35,000  1,000 -7,000 -34,000 
          increase in liabilities:
                                                                                           
          accounts payable
        2,306,000 -3,243,000 296,000 431,000 -1,494,000 100,000 1,889,000 -1,788,000 2,237,000 -1,954,000 -1,289,000 2,986,000 75,000 -1,674,000 1,854,000 3,669,000 7,000 75,000 1,251,000 1,816,000 -326,000 -2,466,000 -1,435,000 379,000 1,198,000 1,826,000 835,000 -2,283,000 578,000 -4,995,000 7,290,000 -1,548,000 -145,000 82,000 -825,000 575,000 996,000 376,000 476,000 452,000 -1,182,000 -588,000 387,000 1,262,000 541,000 400,000 -1,632,000 -228,000 34,000 14,000 367,000 -222,000 525,000 -185,000 17,000 132,000 503,000 -628,000 449,000 -1,217,000 24,000 1,413,000 55,000 588,000 829,000 1,114,000 -829,000 -349,000 -452,000 -854,000 -118,000 7,000 1,287,000 -152,000 296,000 849,000 -815,000 66,000 -1,034,000  59,000 -243,000 1,273,000 
          accrued expenses
        5,073,000 3,226,000 -13,828,000 4,652,000 6,103,000 -2,254,000 -6,117,000 6,389,000 3,642,000 -3,217,000 -4,365,000 802,000 1,764,000 5,490,000 -1,601,000 3,583,000 2,715,000 -2,284,000 689,000 -27,000 1,131,000 2,905,000 -8,106,000 4,020,000 6,214,000 2,210,000 -3,812,000 1,173,000 -372,000 390,000 -1,780,000 1,969,000 2,439,000 -362,000 -3,275,000 -1,472,000 2,325,000 1,894,000 -3,592,000 -619,000 70,000 3,262,000 33,000 -1,045,000 1,215,000 1,133,000 -2,000,000 -605,000 1,577,000 755,000 -4,313,000 -322,000 1,791,000 2,220,000 -1,530,000 1,301,000 419,000 -637,000 539,000 245,000 634,000 567,000 -2,830,000 767,000 946,000 1,948,000 -1,165,000 -165,000 1,108,000 -510,000 -2,274,000 1,033,000 660,000 713,000 -2,606,000 754,000 969,000 69,000 -164,000  -1,156,000 356,000 927,000 
          deferred compensation
        48,000 130,000 464,000 -438,000 259,000 292,000 -3,000 159,000 85,000 399,000 512,000 76,000 -5,000 282,000 -400,000 -367,000 -134,000 448,000 242,000 -1,372,000 17,000 415,000 170,000 292,000 -34,000 22,000 141,000 335,000 15,000 -634,000 198,000 -165,000 -5,540,000 -62,000 330,000 515,000 31,000 213,000 274,000 847,000 35,000 18,000 86,000 -227,000 121,000 96,000 261,000 130,000 161,000 156,000 251,000 119,000 52,000 72,000 209,000 673,000 132,000 197,000 -81,000 292,000 115,000 150,000 -179,000 315,000 223,000 179,000 209,000 142,000 133,000 -17,000 136,000 350,000 190,000 110,000 92,000 364,000 210,000 73,000 16,000  108,000 50,000 37,000 
          other liabilities
        -1,071,000 -1,060,000 -1,039,000 -1,092,000 -1,130,000 -1,131,000 -1,161,000 -2,626,000 -647,000 -21,000 -427,000 1,382,000 -759,000 -549,000 -351,000 -1,206,000 -608,000 -495,000 -490,000 -227,000 527,000 -1,992,000 1,135,000 2,221,000 -49,000 -578,000 -474,000 334,000 -121,000 187,000 183,000 138,000 -528,000 353,000 54,000 157,000 23,000 149,000 86,000 -116,000 -932,000 740,000 240,000 112,000 -5,000 137,000 35,000 -55,000 -47,000 141,000 102,000 314,000 5,000 43,000 -68,000 -308,000 -522,000 438,000 564,000 631,000 -953,000 543,000 392,000 1,114,000 -539,000 412,000 481,000 2,771,000 -530,000 325,000 589,000 833,000 -571,000 308,000 64,000 -431,000 -691,000 305,000 218,000  -253,000 162,000 550,000 
          total adjustments
        10,247,000 5,517,000 -5,107,000 12,140,000 11,014,000 8,490,000 -5,457,000 14,859,000 11,207,000 -3,001,000 -2,178,000 1,054,000 13,405,000 7,384,000 -1,562,000 -811,000 7,532,000 -1,304,000 -1,191,000 4,739,000 3,069,000 2,232,000 -7,384,000 14,312,000 3,349,000 2,829,000 3,232,000 7,541,000 7,111,000 -274,000 -250,000 5,140,000 -12,425,000 10,157,000 -482,000 4,594,000 8,729,000 3,518,000 -684,000 501,000 3,250,000 4,714,000 3,093,000 5,642,000 4,276,000 6,062,000 -372,000 5,120,000 7,588,000 -1,229,000 -3,539,000 -645,000 5,212,000 4,241,000 -28,000 7,811,000 3,463,000 6,665,000 -698,000 -907,000 2,004,000 5,943,000 -2,983,000 3,704,000 3,747,000 3,862,000 5,445,000 4,955,000 3,945,000 2,156,000 -4,828,000 2,765,000 1,388,000 629,000 -2,480,000 4,688,000 1,000,000 3,111,000 392,000  1,696,000 -3,177,000 737,000 
          net cash from operating activities
        24,773,000 18,086,000 10,349,000 25,195,000 22,658,000 21,411,000 10,919,000 23,384,000 18,984,000 9,381,000 8,564,000 12,973,000 21,893,000 11,230,000 3,668,000 4,378,000 5,399,000 657,000 -596,000 5,296,000 5,255,000 6,520,000 -3,435,000 20,193,000 7,999,000 7,578,000 6,692,000 11,379,000 12,672,000 2,008,000 684,000 7,823,000 -8,840,000 9,061,000 2,568,000 5,916,000 11,940,000 7,768,000 1,325,000 5,762,000 2,358,000 8,535,000 8,516,000 10,708,000 5,661,000 8,859,000 1,748,000 5,586,000 8,310,000 3,052,000 -652,000 4,092,000 8,463,000 6,387,000 4,424,000 7,703,000 5,355,000 9,904,000 377,000 1,988,000 3,864,000 7,720,000 -464,000 6,120,000 6,333,000 6,124,000 7,639,000 7,507,000 6,361,000 4,528,000 -2,582,000 5,218,000 3,401,000 2,718,000 4,000 6,739,000 2,999,000 5,074,000 2,039,000 7,261,000 2,919,000 -1,310,000 1,765,000 
          cash flows from investing activities
                                                                                           
          capital expenditures
        -6,101,000 -5,751,000 -9,066,000 -8,079,000 -6,677,000 -4,989,000 -12,817,000 -8,283,000 -8,171,000 -7,482,000 -8,064,000 -6,924,000 -4,159,000 -5,764,000 -7,521,000 -6,819,000 -5,438,000 -3,838,000 -6,736,000 -8,082,000 -3,159,000 -4,030,000 -3,568,000 -3,870,000 -3,584,000 -3,386,000 -3,900,000 -4,867,000 -3,963,000 -2,141,000 -4,058,000 -4,541,000 -3,683,000 -2,805,000 -4,045,000 -4,345,000 -3,139,000 -2,984,000 -4,295,000 -3,632,000 -2,257,000 -3,030,000 -1,765,000 -1,914,000 -4,025,000 -4,203,000 -5,717,000 -5,275,000 -6,509,000 -3,400,000 -3,382,000 -1,990,000 -2,796,000 -2,852,000 -2,157,000 -1,508,000 -1,940,000 -1,901,000 -1,611,000 -3,596,000 -5,437,000 -3,135,000 -1,638,000 -2,468,000 -3,127,000 -3,491,000 -1,327,000 -2,571,000 -4,925,000 -4,205,000 -3,552,000 -2,950,000 -524,000 -1,681,000 -2,147,000 -1,141,000 -2,518,000 -1,746,000 -2,352,000 -1,840,000 -1,589,000 -3,035,000 
          free cash flows
        18,672,000 12,335,000 1,283,000 17,116,000 15,981,000 16,422,000 -1,898,000 15,101,000 10,813,000 1,899,000 500,000 6,049,000 17,734,000 5,466,000 -3,853,000 -2,441,000 -39,000 -3,181,000 -7,332,000 -2,786,000 2,096,000 2,490,000 -7,003,000 16,323,000 4,415,000 4,192,000 2,792,000 6,512,000 8,709,000 -133,000 -3,374,000 3,282,000 -12,523,000 6,256,000 -1,477,000 1,571,000 8,801,000 4,784,000 -2,970,000 2,130,000 101,000 5,505,000 6,751,000 8,794,000 1,636,000 4,656,000 -3,969,000 311,000 1,801,000 -348,000 -4,034,000 2,102,000 5,667,000 3,535,000 2,267,000 6,195,000 3,415,000 8,003,000 -1,234,000 -1,608,000 -1,573,000 4,585,000 -2,102,000 3,652,000 3,206,000 2,633,000 6,312,000 4,936,000 1,436,000 323,000 -6,134,000 2,268,000 2,877,000 1,037,000 -2,143,000 5,598,000 481,000 3,328,000 -313,000 7,261,000 1,079,000 -2,899,000 -1,270,000 
          proceeds from sale of property, plant and equipment
           62,000    1,000    60,000 5,000       5,000 1,000 3,000 -49,000        29,000 8,000 3,000 8,000 4,000 58,000 1,000 1,000 5,000 7,000   7,000 15,000 89,000 75,000 2,000 14,000 4,000 28,000 30,000 4,000 -3,000 11,000 13,000 10,000 7,000 11,000 21,000 110,000 30,000 8,000   5,000 11,000 3,000 8,000 15,000   4,000 23,000 30,000  3,000 1,000,000 
          acquisition of a business
                                                                                          
          dispositions of short-term investments
                                   730,000 480,000 2,172,000 8,430,000 14,082,000 12,570,000 7,360,000 18,480,000 9,680,000 10,120,000 4,440,000 9,946,000 18,534,000 17,455,000 735,000 490,000 480,000 460,000 961,000 1,440,000 1,080,000 5,780,000 10,807,000 8,545,000                                 
          net cash from investing activities
        -5,789,000 -5,751,000 -9,066,000 -8,017,000 -6,588,000 -5,104,000 -12,817,000 -52,580,000 -7,990,000 -7,482,000 -8,064,000 -7,133,000 -4,154,000 -5,759,000 -7,521,000 -6,798,000 -5,438,000 -3,838,000 -6,736,000 -8,077,000 -3,158,000 -4,030,000 -3,565,000 -3,919,000 -3,472,000 -3,386,000 -3,900,000 -4,130,000 -4,213,000 31,000 424,000 1,964,000 5,708,000 -6,531,000 1,431,000 -9,186,000 -14,412,000 -4,979,000 533,000 -3,314,000 2,353,000 -14,481,000 -2,965,000 -3,624,000 -2,655,000 -3,142,000 -4,825,000 -4,586,000 -2,574,000 -7,515,000 -895,000 -2,997,000 -9,824,000 -5,269,000 -928,000 -1,629,000 -2,007,000 -2,468,000 5,834,000 1,317,000 -4,815,000 -20,640,000 473,000 -4,297,000   -2,323,000 -6,564,000 5,590,000 -3,199,000 1,984,000  5,057,000 -3,451,000 -6,355,000 -4,024,000 1,777,000 -3,515,000 295,000 -4,465,000 2,004,000 -11,573,000 -945,000 
          cash flows from financing activities
                                                                                           
          payments on revolving credit facility
            -5,000,000 -5,000,000                                                                             
          dividends paid
        -2,749,000 -2,433,000 -2,444,000 -2,105,000 -2,096,000 -2,098,000 -2,096,000 -1,958,000 -1,959,000 -1,962,000 -1,927,000 -1,859,000 -1,863,000 -1,860,000 -1,851,000 -1,804,000 -1,845,000 -1,863,000 -1,865,000 -1,793,000 -1,793,000 -1,803,000 -1,803,000 -1,738,000 -1,765,000 -1,766,000 -1,761,000 -1,689,000 -1,680,000 -1,660,000 -1,627,000 -1,559,000 -1,559,000 -1,559,000 -1,553,000 -1,485,000 -1,485,000 -1,479,000 -1,477,000 -1,410,000 -1,407,000 -1,406,000 -1,377,000 -1,310,000 -1,314,000 -1,312,000 -1,311,000 -1,246,000 -1,241,000 -1,242,000 -1,236,000 -3,475,000 -1,155,000 -1,091,000 -1,133,000 -1,132,000 -1,130,000 -1,060,000 -1,055,000 -1,060,000 -1,043,000 -997,000 -1,004,000 -996,000 -995,000 -924,000 -922,000 -919,000 -919,000 -849,000 -850,000 -844,000 -834,000 -767,000 -762,000 -755,000 -754,000  -610,000 -606,000 -559,000 
          purchases of treasury stock
        -173,000 -5,404,000 -6,960,000  -69,000 -180,000 -1,984,000  -115,000 -1,703,000 -872,000  -133,000 -92,000  -4,305,000 -3,910,000 -2,291,000  -736,000                                                               
          net cash from financing activities
        -2,922,000 -7,837,000 -9,404,000 -3,221,000 -2,165,000 -7,278,000 -9,080,000 6,864,000 7,926,000 -3,665,000 -2,799,000 -3,712,000 -1,870,000 -1,993,000 -1,943,000 -4,104,000 -6,150,000 19,113,000 -4,156,000 -2,998,000 -2,529,000 -3,014,000 -2,781,000 4,102,000 -5,719,000 -1,789,000 -5,344,000 -1,695,000 -1,686,000 -1,660,000 -4,845,000 -7,558,000 4,441,000 -1,559,000 -4,663,000 -1,289,000 -1,477,000 -1,230,000 -4,554,000 -1,099,000 -1,394,000 -1,272,000 -4,677,000 -1,267,000 -1,384,000 -1,306,000 -4,786,000 -1,206,000 -1,247,000 -1,247,000 -4,672,000 259,000 -1,456,000 -2,862,000 -3,391,000 -4,661,000 -5,032,000 -973,000 -3,223,000 -878,000 -2,710,000 16,151,000 -2,634,000 -4,715,000 -4,333,000 -1,126,000 -1,140,000 -342,000 -2,335,000 -638,000 -5,767,000 -435,000 -4,672,000 -554,000 -5,000 -497,000 -4,078,000 -212,000 -759,000 -3,795,000 -3,881,000 14,148,000 -912,000 
          effect of exchange rate changes on cash and cash equivalents
        -54,000 51,000 47,000 26,000 -19,000 54,000 3,000 -8,000 101,000 -13,000 124,000 -120,000 -74,000 3,000 -32,000 -3,000 5,000 22,000 -48,000 52,000 42,000 -59,000 182,000 -34,000 171,000 -94,000 -50,000 84,000 76,000 -23,000 -1,000 -85,000 -77,000 9,000 -30,000 51,000 -8,000 10,000 58,000 86,000 50,000 34,000 -1,000 -58,000 -6,000 -54,000 39,000 -135,000 16,000 -40,000 32,000 36,000 -3,000 -21,000 31,000 -26,000 -104,000 127,000 6,000 -169,000 -48,000 -38,000 15,000 -108,000 -9,000 13,000    825,000 41,000 54,000 242,000 -407,000 -146,000 -209,000 98,000 -55,000 -219,000 -90,000   
          net increase in cash and cash equivalents
           13,983,000    -22,340,000    2,008,000 15,795,000           20,342,000    5,638,000 6,849,000   2,144,000 1,232,000      -2,638,000    873,000        -6,259,000 1,386,000 -2,781,000 -1,747,000 84,000 1,444,000 -1,710,000 6,359,000 3,115,000 2,433,000 -3,830,000 3,183,000 -2,663,000 -2,877,000 775,000 4,836,000 4,189,000 159,000    -1,317,000 3,840,000 -1,045,000 -6,763,000  489,000 1,445,000 1,520,000 -1,218,000 952,000   
          cash, cash equivalents and restricted cash, beginning of period
        50,458,000  24,481,000                                                                             
          cash, cash equivalents and restricted cash, end of period
        16,008,000 4,549,000 42,384,000    13,506,000                                                                             
          net decrease in cash and cash equivalents
         4,549,000 -8,074,000   9,083,000 -10,975,000   -1,779,000 -2,175,000    -5,828,000 -6,527,000   -11,536,000  -390,000 -583,000 -9,599,000   2,309,000 -2,602,000    -3,738,000    -694,000  -3,957,000    3,367,000    1,616,000 4,357,000 -7,824,000  4,354,000                     964,000 -5,540,000            -92,000 
          cash flows from operating activities
                                                                                           
          non-cash stock compensation expense
                                           370,000 360,000 346,000 431,000 285,000 324,000 306,000 332,000 276,000 210,000 348,000 308,000 316,000 313,000 319,000 241,000 248,000 203,000 210,000 203,000 208,000 179,000 173,000 167,000 166,000 160,000 191,000 124,000 88,000 79,000 87,000 86,000 107,000 96,000 98,000 159,000 211,000 223,000 223,000 245,000 268,000 243,000 270,000 297,000  137,000 71,000 40,000 
          loss on pension termination
                   -206,000                                                                        
          deferred income tax expense
                                                                                           
          net increase to provision for bad debts and cash discounts
                                                                                           
          accretion for asset retirement obligation
                                                                                           
          loss on sale of fixed assets
                                                                                           
          decrease in:
                                                                                           
          increase in:
                                                                                           
          acquisition of business
                                                       -62,000 -309,000                                   
          acquisition of equity in agromex
                                                                                           
          proceeds from issuance of notes payable
                                                                                       
          principal payments on notes payable
                               -3,239,000 1,000 -3,083,000 -3,083,000 -3,083,000 -3,083,000 -3,484,000 -3,500,000 -3,500,000 -1,500,000 -2,300,000 -1,500,000 -2,100,000 -2,000,000 -1,500,000 -3,000,000 -200,000 -1,500,000 -4,080,000  -4,000,000 -80,000  -4,000,000       
          payment of debt issuance costs
                                                                                        
          purchase of treasury stock
                              -978,000 -921,000 -4,097,000 -23,000 -500,000 -6,000 -6,000 -135,000 1,000 -27,000 -13,000 -122,000 -18,000    -24,000 -50,000   -166,000 -9,000 -3,766,000    -280,000 -1,683,000 -511,000 -3,960,000 -1,490,000   -7,000 -5,000 -644,000    -4,000     -2,712,000 -1,196,000 -630,000 
          cash, cash equivalents and restricted cash, beginning of year
                                                                                           
          cash, cash equivalents and restricted cash, end of year
                                                                                           
          cash and cash equivalents, end of period
            13,886,000    19,021,000 -1,779,000 29,579,000  15,795,000 3,481,000 10,470,000  -6,184,000 15,954,000 13,055,000  -390,000 -583,000 31,291,000  -1,021,000 2,309,000 19,260,000  6,849,000 356,000 9,019,000  1,232,000 980,000 8,401,000  -3,957,000 1,569,000 15,991,000  3,367,000 -7,184,000 21,011,000  1,616,000 4,357,000 8,406,000  4,354,000 -5,694,000 17,776,000  -2,781,000 -1,747,000 27,177,000                             
          loss on impairments and disposals of property, plant and equipment
                                                                                           
          proceeds from long-term debt
                                                                                           
          impairment of patents
                                                                                           
          loss on impairment of fixed assets
                   104,000                                                                        
          cash and cash equivalents, beginning of period
                31,754,000  16,298,000  24,591,000  40,890,000  21,862,000  12,757,000  9,095,000  18,629,000  20,138,000  16,230,000  24,035,000  27,093,000                             
          provision for deferred income taxes
                                                                                           
          loss on impairment of goodwill
                                                                                          
          pension and postretirement benefits
                   -104,000 -604,000 -187,000 -190,000 -1,014,000 -308,000 -313,000 -303,000 -1,996,000 -219,000 -609,000 172,000 -202,000 54,000 -6,157,000 621,000 2,020,000 428,000 380,000 479,000 175,000 -11,872,000 315,000 334,000 -924,000 132,000 537,000 464,000 3,414,000 203,000 122,000 432,000 670,000 -375,000 162,000 357,000 2,249,000 110,000 251,000 277,000 -2,845,000 67,000 208,000 674,000                             
          cash and cash equivalents, beginning of year
                                                                 17,885,000 18,762,000 11,839,000 6,848,000 12,133,000 6,607,000  5,945,000 
          cash and cash equivalents, end of year
                                                                                           
          impairment of goodwill
                                                                                           
          curtailment gain on serp plan
                                                                                         
          contributions from noncontrolling interests
                                                                                          
          stock-based compensation
                            559,000 506,000 784,000  770,000 810,000 969,000  692,000 246,000 652,000  402,000 411,000 359,000                                                 
          loss on the sale of fixed assets
                            -2,000 13,000 -1,000  -14,000 76,000 40,000  3,000    3,000 24,000 7,000  16,000 115,000 161,000  -3,000 179,000 23,000  -6,000 85,000 33,000  92,000 26,000 -13,000  -20,000 -3,000 10,000  174,000    23,000    2,000 62,000 1,000  11,000 23,000 1,000  143,000 -19,000 37,000         
          amortization of investment discounts
                                                                                           
          purchases of short-term investments
                                   -730,000 -3,948,000 -6,876,000 -4,934,000 -11,089,000 -13,012,000 -14,525,000 -21,451,000 -6,436,000 -5,119,000 -18,221,000 -12,852,000 -12,435,000 -1,690,000 -2,190,000 -700,000 -480,000 -1,920,000 -2,719,000 -5,272,000                                 
          amortization of investment net discount
                                    -10,000  -39,000 -32,000 -25,000  -11,000 -3,000 -2,000  -4,000    -1,000  -1,000 -1,000                                 
          loss on the sale of property, plant and equipment
                                                                                           
          life insurance benefits
                                       -6,000                                                  
          proceeds from life insurance
                                                                                         
          proceeds from short-term borrowing
                                                                                           
          excess tax benefits for share-based payments
                                           -196,000 -21,000 -79,000 -128,000 -126,000 -13,000 -38,000 -17,000 -9,000 -52,000 -6,000 -10,000 -21,000 -44,000 -8,000 -13,000 -58,000 -11,000 -188,000 -11,000 -36,000 -11,000 -15,000 -30,000 -57,000 -68,000 -99,000 -118,000 -87,000 -208,000 -83,000 -5,000 -125,000 -20,000 -108,000 -61,000 -36,000 -39,000 -80,000 -158,000 -76,000 -163,000 -85,000 -1,000  -374,000 -102,000 -40,000 
          proceeds from issuance of common stock
                                             -89,000 185,000 34,000 15,000 12,000 201,000 33,000 509,000 62,000 160,000 71,000 42,000 48,000 119,000 468,000 142,000 185,000 159,000 802,000 243,000 54,000 254,000 189,000 83,000 109,000 182,000 300,000 593,000 66,000 441,000 467,000 29,000  1,711,000 408,000 213,000 
          gain on sale of marketable securities
                                                   -105,000                                     
          restricted cash
                                                   100,000 29,000 62,000 309,000                                   
          proceeds from sale of marketable securities
                                                   108,000                                     
          proceeds from issuance of treasury stock
                                               185,000       43,000 39,000   31,000 112,000 109,000 25,000 26,000   33,000 37,000 7,000 63,000     80,000     292,000   
          capacity rationalization charges
                                                           8,000 50,000 12,000                             
          advance payment for acquisition
                                                          -800,000                                 
          amortization of investment premiums
                                                                                           
          provision for bad debts
                                                       33,000 -9,000 25,000 20,000 5,000 23,000 2,000 34,000 1,000                            
          decrease in assets, net of acquisition:
                                                                                           
          increase in liabilities, net of acquisition:
                                                                                           
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                                           
          amortization of investment net (discount) premium
                                                            -2,000                               
          purchases of investment in short-term securities
                                                            -10,776,000 -8,667,000 -3,480,000 -3,558,000 -3,478,000 -8,100,000 -2,465,000 -8,519,000 -13,189,000                       
          dispositions of investment in short-term securities
                                                            3,720,000 6,220,000 4,705,000 3,440,000 3,400,000 7,520,000 9,900,000 13,425,000 13,800,000                       
          amortization of investment discount
                                                              -2,000  5,000 12,000  11,000 5,000 4,000  -2,000 -2,000 -4,000  -6,000 -34,000 -75,000  -146,000 -207,000 -248,000  -225,000 -227,000 -220,000  -187,000 -133,000 -112,000 
          benefit from bad debts
                                                                 20,000 25,000  7,000 -3,000 38,000  34,000 2,000 -54,000  -23,000 36,000 37,000  -11,000 61,000 59,000  84,000 183,000 22,000  50,000 137,000 20,000 
          cash and cash equivalents, january 31
                                                                                           
          gain on the sale of fixed assets
                                                                  -2,000                         
          other
                                                                  -102,000 6,000 89,000 41,000 8,000 -29,000 125,000 30,000 -4,000 170,000 37,000 -18,000 -331,000 -24,000 -23,000 -90,000 158,000 52,000 61,000 -9,000 45,000  64,000 101,000 104,000 
          cash and cash equivalents, october 31
                                                                  21,000,000    16,099,000    16,028,000    1,308,000    5,370,000    8,127,000    5,853,000 
          adjustments to reconcile net income to net cash from operating activities
                                                                                           
          cash and cash equivalents, april 30
                                                                                           
          adjustments to reconcile net income to net cash
                                                                                           
          provided by operating activities:
                                                                                           
          the accompanying notes are an integral part of the condensed consolidated financial statements.
                                                                                           
          (gain) loss on the sale of fixed assets
                                                                      -16,000                     
          purchases of short-term securities
                                                                      -5,999,000                     
          dispositions of short-term securities
                                                                      8,000,000                     
          adjustments to reconcile net income to net
                                                                                           
          cash from operating activities:
                                                                                           
          purchase of strategic intangible assets
                                                                                           
          purchases of investment securities
                                                                        -2,998,000 -1,999,000 -12,996,000  -20,996,000 -23,997,000 -28,972,000  -15,934,000           
          dispositions of investment securities
                                                                        5,000,000 5,000,000 12,000,000  31,500,000 25,000,000 34,500,000  21,500,000           
          net cash (used in) investing activities
                                                                                           
          purchases of investment in treasury securities
                                                                                           
          dispositions of investment in treasury securities
                                                                                           
          effect of exchange rate changes
                                                                            -208,000               
          prepaid overburden removal expense
                                                                                        -4,000 27,000 -156,000 
          purchases of investments in debt securities
                                                                                        -996,000 -18,000 -2,288,000 
          maturities of investments in debt securities
                                                                                        1,620,000 120,000 1,658,000 
          net cash used in investing activities
                                                                                           
          principal payments on long-term debt
                                                                                      -80,000  -3,000,000 -80,000 
          proceeds from issuance of long-term debt
                                                                                          
          purchases of treasury securities
                                                                                  -30,208,000  -19,728,000 -14,769,000 -8,083,000  -21,571,000 -19,779,000 -7,453,000 
          dispositions of treasury securities
                                                                                  26,000,000  24,000,000 13,000,000 10,700,000  24,788,000 9,693,000 9,173,000 
          net increase (decrease) in cash and cash equivalents
                                                                                           
          gain on the sale of long-lived assets
                                                                                    -22,000 440,000 6,000     
          proceeds from issuance of note payable
                                                                                           
          (gain) loss on the sale of long-lived assets
                                                                                        38,000   
          (gain) loss on the sale of property, plant and equipment
                                                                                          -408,000 
          loss on impaired assets
                                                                                           
          other receivables
                                                                                           
          proceeds from the sale of phoebe products co.
                                                                                           
          purchases of net assets