7Baggers

Napco Security Technologies, Inc
(NASDAQ:NSSC) 

NSSC stock logo

Napco Security Technologies, Inc. develops, manufactures, and sells security products in the United States and internationally. The company offers access control systems, door-locking products, intrusion and fire alarm systems, and video surveillance systems for commercial, residential, institutiona...

Founded: 1969
Full Time Employees: 1,161
Sector: Industrials
Industry: Security & Protection Services

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• Market Cap:
• Exchange:
• Shs Outstanding:
• Employees:
• Beta:
• Return on Equity (ROE) ttm:
• Return on Assets (ROA) ttm:
• EPS ttm:
• Book value per Share:
• Cash per Share:
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• Operating Mgn ttm:
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• Ex-Dividend date:
• Target Price High:
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• Number of Analysts:
• Debt Ratio ttm:
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• Total Net Debt:
At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 
                                                                   
      revenue:
                                                                   
      equipment revenue
    24,238,000 24,323,000 25,739,000                                                             
      service revenue
    24,929,000 23,849,000 23,429,000                                                             
      total revenue
    49,167,000 48,172,000 49,168,000                                                             
      yoy
                                                                   
      qoq
    2.07% -2.03%                                                              
      cost of revenue:
                                                                   
      cost of equipment revenue
    17,289,000 17,607,000 19,046,000                                                             
      cost of service revenue
    2,389,000 2,327,000 2,276,000                                                             
      total cost of revenue
    19,678,000 19,934,000 21,322,000                                                             
      gross profit
    29,489,000 28,238,000 27,846,000 26,798,000 25,127,000 24,489,000 24,616,000 27,845,000 26,484,000 25,012,000 22,413,000 12,933,000 22,671,000 19,462,000 18,167,000 19,224,000 15,033,000 11,443,000 13,456,000 15,146 12,910 11,403 10,692,000 7,991,000 11,956,000 12,127,000 11,518,000 12,931,000 10,729,000 10,671,000 9,559,000 12,138,000 8,892,000 6,840,000 6,879,000 9,846,000 6,663,000 6,617,000 6,452,000 9,638,000 6,108,000 6,201,000 5,637,000 9,343,000 5,346,000 6,103,000 5,255,000 8,276,000 5,317,000 5,081,000 5,039,000 8,295,000 4,652,000 4,641,000 4,136,000 7,037,000 5,064,000 4,895,000 4,156,000 6,475,000 5,513,000 4,690,000 3,423,000 
      yoy
    17.36% 15.31% 13.12% -3.76% -5.12% -2.09% 9.83% 115.30% 16.82% 28.52% 23.37% -32.72% 50.81% 70.08% 35.01% 126824.60% 116344.62% 100250.78% 25.85% -99.81% -99.89% -99.91% -7.17% -38.20% 11.44% 13.64% 20.49% 6.53% 20.66% 56.01% 38.96% 23.28% 33.45% 3.37% 6.62% 2.16% 9.09% 6.71% 14.46% 3.16% 14.25% 1.61% 7.27% 12.89% 0.55% 20.11% 4.29% -0.23% 14.29% 9.48% 21.83% 17.88% -8.14% -5.19% -0.48% 8.68% -8.14% 4.37% 21.41%     
      qoq
    4.43% 1.41% 3.91% 6.65% 2.61% -0.52% -11.60% 5.14% 5.89% 11.60% 73.30% -42.95% 16.49% 7.13% -5.50% 27.88% 31.37% -14.96% 88741.94% 17.32% 13.22% -99.89% 33.80% -33.16% -1.41% 5.29% -10.93% 20.52% 0.54% 11.63% -21.25% 36.50% 30.00% -0.57% -30.13% 47.77% 0.70% 2.56% -33.06% 57.79% -1.50% 10.01% -39.67% 74.77% -12.40% 16.14% -36.50% 55.65% 4.64% 0.83% -39.25% 78.31% 0.24% 12.21% -41.22% 38.96% 3.45% 17.78% -35.81% 17.45% 17.55% 37.01%  
      gross margin %
    59.98% 58.62% 56.63% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      operating expenses:
                                                                   
      research and development
    3,418,000 3,473,000 3,240,000 3,232,000 3,185,000 3,107,000 3,057,000 3,027,000 2,757,000 2,542,000 2,437,000 2,364,000 2,314,000 2,222,000 2,428,000 2,106,000 2,009,000 1,978,000 1,931,000 1,945 1,902 1,884 1,889,000 1,870,000 1,815,000 1,823,000 1,749,000 1,854,000 1,851,000 1,762,000 1,745,000                                 
      selling, general, and administrative
    11,259,000 10,012,000 10,963,000                                                             
      litigation settlement cost
    16,000,000                                                               
      total operating expenses
    30,677,000 13,485,000 14,203,000 14,712,000 13,981,000 13,318,000 12,760,000 13,881,000 11,990,000 11,207,000 10,858,000 11,225,000 10,739,000 10,026,000 10,918,000 11,030,000 10,451,000 10,173,000 9,277,000                                             
      operating income
    -1,188,000 14,753,000 13,643,000 12,086,000 11,146,000 11,171,000 11,856,000 13,964,000 14,494,000 13,805,000 11,555,000 1,708,000 11,932,000 9,436,000 7,249,000 8,194,000 4,582,000 1,270,000 4,179,000 5,984 5,028 3,669 2,654,000 -835,000 4,045,000 3,994,000 3,609 4,766,000 3,647,000 3,294,000 1,759,000 4,277,000 1,912,000 1,166,000 1,059,000 3,462,000 1,136,000 1,064,000 716,000 3,756,000 1,217,000 1,026,000 324,000 3,462,000 477,000 1,096,000 246,000 2,823,000 749,000 534,000 262,000 3,583,000 258,000 354,000 -399,000 2,369,000 689,000 895,000 -142,000 2,042,000 657,000 531,000 -717,000 
      yoy
    -110.66% 32.07% 15.07% -13.45% -23.10% -19.08% 2.60% 717.56% 21.47% 46.30% 59.40% -79.16% 160.41% 642.99% 73.46% 136831.82% 91029.67% 34514.34% 57.46% -100.72% -99.88% -99.91% 73438.38% -117.52% 10.91% 21.25% -99.79% 11.43% 90.74% 182.50% 66.10% 23.54% 68.31% 9.59% 47.91% -7.83% -6.66% 3.70% 120.99% 8.49% 155.14% -6.39% 31.71% 22.64% -36.32% 105.24% -6.11% -21.21% 190.31% 50.85% -165.66% 51.25% -62.55% -60.45% 180.99% 16.01% 4.87% 68.55% -80.20%     
      qoq
    -108.05% 8.14% 12.88% 8.43% -0.22% -5.78% -15.10% -3.66% 4.99% 19.47% 576.52% -85.69% 26.45% 30.17% -11.53% 78.83% 260.79% -69.61% 69736.23% 19.01% 37.04% -99.86% -417.84% -120.64% 1.28% 110567.78% -99.92% 30.68% 10.72% 87.27% -58.87% 123.69% 63.98% 10.10% -69.41% 204.75% 6.77% 48.60% -80.94% 208.63% 18.62% 216.67% -90.64% 625.79% -56.48% 345.53% -91.29% 276.90% 40.26% 103.82% -92.69% 1288.76% -27.12% -188.72% -116.84% 243.83% -23.02% -730.28% -106.95% 210.81% 23.73% -174.06%  
      operating margin %
    -2.42% 30.63% 27.75% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% 
      other income:
                                                                   
      interest income
    881,000 884,000 854,000                                                             
      other income
    105,000 102,000 138,000                                                             
      income before provision for income taxes
    -202,000 15,739,000 14,635,000 12,969,000 12,008,000 12,092,000 13,000,000 14,726,000 15,131,000 14,534,000 11,995,000 2,090,000 12,369,000 9,623,000 7,146,000 8,013,000 4,405,000 1,328,000 8,100,000 6,032 4,984 3,666 2,648,000 -841,000 4,040,000 4,003,000 3,602 4,763,000 3,642,000 3,288,000 1,752,000                     3,445,000 133,000 209,000  2,042,000 387,000 584,000      
      provision for income taxes
    206,000 2,236,000 2,470,000 1,337,000 1,886,000 1,625,000 1,815,000 1,192,000 1,935,000 1,924,000 1,517,000 651,000 1,529,000 1,177,000 744,000 476,000 1,132,000 291,000 348,000 1,007 624 469 329,000 1,059,000 425,000 431,000 369 35,000 520,000 419,000 248,000                     236,000 22,000 74,000  201,000 84,000 275,000      
      net income
    -408,000 13,503,000 12,165,000 11,632,000 10,122,000 10,467,000 11,185,000 13,534,000 13,196,000 12,610,000 10,478,000 1,439,000 10,840,000 8,446,000 6,402,000 7,537,000 3,273,000 1,037,000 7,752,000 5,025 4,360 3,197 2,319,000 -1,900,000 3,615,000 3,572,000 3,233 4,728,000 3,122,000 2,869,000 1,504,000 3,697,000 1,829,000 1,233,000 890,000 3,222,000 952,000 857,000 568,000 3,438,000 1,044,000 976,000 315,000 3,340,000 395,000 951,000 159,000 2,335,000 650,000 368,000 123,000 3,209,000 111,000 135,000 -434,000 1,841,000 303,000 309,000 -167,000 1,403,000 695,000 157,000 -1,134,000 
      yoy
    -104.03% 29.01% 8.76% -14.05% -23.29% -16.99% 6.75% 840.51% 21.73% 49.30% 63.67% -80.91% 231.19% 714.46% -17.41% 149890.05% 74968.81% 32336.66% 234.28% -100.26% -99.88% -99.91% 71629.04% -140.19% 15.79% 24.50% -99.79% 27.89% 70.69% 132.68% 68.99% 14.74% 92.12% 43.87% 56.69% -6.28% -8.81% -12.19% 80.32% 2.93% 164.30% 2.63% 98.11% 43.04% -39.23% 158.42% 29.27% -27.24% 485.59% 172.59% -128.34% 74.31% -63.37% -56.31% 159.88% 31.22% -56.40% 96.82% -85.27%     
      qoq
    -103.02% 11.00% 4.58% 14.92% -3.30% -6.42% -17.36% 2.56% 4.65% 20.35% 628.14% -86.73% 28.34% 31.93% -15.06% 130.28% 215.62% -86.62% 154168.66% 15.25% 36.38% -99.86% -222.05% -152.56% 1.20% 110385.62% -99.93% 51.44% 8.82% 90.76% -59.32% 102.13% 48.34% 38.54% -72.38% 238.45% 11.09% 50.88% -83.48% 229.31% 6.97% 209.84% -90.57% 745.57% -58.46% 498.11% -93.19% 259.23% 76.63% 199.19% -96.17% 2790.99% -17.78% -131.11% -123.57% 507.59% -1.94% -285.03% -111.90% 101.87% 342.68% -113.84%  
      net income margin %
    -0.83% 28.03% 24.74% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% 
      income per share:
                                                                   
      basic
    -0.01 0.38 0.34 0.33 0.28 0.29 0.3 0.36 0.36 0.34 0.28 0.04 0.29 0.23 0.17 0.2 0.09 0.03 0.42 0.27 0.24 0.17 0.13 -0.1 0.2 0.19 0.17 0.26 0.17 0.15 0.08                       0.01       0.04 0.01  
      diluted
    -0.01 0.38 0.34 0.33 0.28 0.28 0.3 0.36 0.36 0.34 0.28 0.04 0.29 0.23 0.17 0.2 0.09 0.03 0.42 0.27 0.24 0.17 0.13 -0.1 0.2 0.19 0.17 0.26 0.17 0.15 0.08                       0.01       0.04 0.01  
      weighted-average number of shares outstanding:
                                                                   
      basic
    35,691,000 35,664,000 35,658,000 36,298,000 36,111,000 36,538,000 36,865,000 36,812,000 36,835,000 36,829,000 36,827,000 36,741,000 36,793,000 36,772,000 36,762,000 36,725,000 36,743,000 36,728,000 18,350,000 18,348,000 18,349,000 18,347,000 18,347,000 18,444,000 18,472,000 18,478,000 18,478,000 18,574,000 18,489,000 18,603,000 18,726,000 18,788,000 18,737,000 18,849,000 18,846,000 18,809,000 18,819,000 18,798,000 18,787,000 18,874,000 18,811,000 18,931,000 18,965,000 19,164,000 19,066,000 19,188,000 19,412,000 19,392,000 19,416,000 19,408,000 19,323,000 19,210,000 19,296,000 19,154,000 19,097,000 19,096,000 19,096,000 19,096,000 19,096,000 19,096,000 19,096,000 19,096,000 19,096,000 
      diluted
    35,691,000 35,915,000 35,865,000 36,499,000 36,253,000 36,776,000 37,180,000 37,066,000 37,118,000 37,018,000 37,076,000 37,005,000 37,082,000 36,997,000 36,990,000 36,867,000 36,879,000 36,898,000 18,422,000 18,404,000 18,412,000 18,402,000 18,392,000 18,493,000 18,516,000 18,538,000 18,536,000 18,624,000 18,533,000 18,649,000 18,776,000 18,825,000 18,772,000 18,883,000 18,879,000 18,854,000 18,855,000 18,851,000 18,838,000 18,894,000 18,828,000 18,957,000 18,986,000 19,169,000 19,073,000 19,189,000 19,412,000 19,428,000 19,471,000 19,444,000 19,341,000 19,362,000 19,419,000 19,496,000 19,097,000 19,303,000 19,409,000 19,256,000 19,096,000 19,176,000 19,193,000 19,096,000 19,096,000 
      net sales:
                                                                   
      equipment revenues
       28,298,000 22,351,000 21,725,000 22,917,000 29,938,000 29,735,000 29,007,000 24,391,000 28,551,000 28,390,000 27,434,000 25,687,000 30,532,000 23,873,000 22,380,000 20,827,000 25,882,000 19,335,000 19,016,000 15,898,000 15,243,250 20,007,000 20,045,000 20,921,000 24,633,000 20,597,000 20,685,000 19,590,000 23,818,000 19,042,000                               
      service revenues
       22,426,000 21,610,000 21,208,000 21,086,000 20,392,000 19,532,000 18,540,000 17,285,000 16,107,000 15,142,000 14,880,000 13,806,000 12,697,000 12,032,000 11,028,000 10,224,000 9,547,000 8,893,000 8,189,000 7,275,000 4,345,000 6,232,000 5,784,000 5,364,000 4,951,000 4,546,000 4,144,000 3,786,000 3,442,000 3,158,000                               
      net sales: - sum
       50,724,000 43,961,000 42,933,000 44,003,000 50,330,000 49,267,000 47,547,000 41,676,000 44,658,000 43,532,000 42,314,000 39,493,000 43,229,000 35,905,000 33,408,000 31,051,000       25,829,000 26,285,000                                     
      cost of sales:
                                                                   
      equipment related expenses
        16,852,000 16,606,000   21,179,000 20,656,000 17,497,000 15,060,000 19,388,000 21,187,000 19,665,000 22,394,000 19,334,000 20,571,000 16,172,000 19,018 14,074 14,599 11,307,000 13,909,000 13,285,000 12,602,000 13,638,000 15,559,000 13,471,000 13,203,000 13,007,000 14,382,000 12,557,000                               
      service-related expenses
       2,099,000 1,982,000 1,838,000 1,877,000 1,955,000 1,604,000 1,879,000 1,766,000 1,768,000 1,473,000 1,665,000 1,661,000 1,611,000 1,538,000 1,394,000 1,423,000 1,265 1,244                                           
      cost of sales: - sum
       23,926,000 18,834,000 18,444,000 19,387,000 22,485,000 22,783,000 22,535,000 19,263,000 31,725,000 20,861,000 22,852,000 21,326,000 24,005,000 20,872,000 21,965,000 17,595,000 20,283 15,318 15,802    13,702,000 14,767,000                                     
      selling, general, and administrative expenses
       11,480,000 10,796,000 10,211,000 9,703,000 10,854,000 9,233,000 8,665,000 8,421,000 8,861,000 8,425,000 7,804,000 8,490,000 8,924,000 8,442,000 8,195,000 7,346,000 7,217 5,980 5,850 6,149,000 5,104,000 6,096,000 6,310,000 6,160,000 6,311,000 5,231,000 5,615,000 6,055,000 6,146,000 5,311,000 5,674,000 5,820,000 6,384,000 5,527,000 5,553,000 5,736,000 5,882,000 4,891,000 5,175,000 5,313,000 5,881,000 4,869,000 5,007,000 5,009,000 5,453,000 4,568,000 4,547,000 4,777,000 4,712,000 4,394,000 4,287,000 4,535,000 4,668,000 4,375,000 4,000,000 4,298,000 4,033,000 4,856,000 4,159,000 4,140,000 
      interest and other income
       883,000 862,000 921,000 1,144,000 762,000 637,000 729,000 440,000 382,000 437,000 187,000 -103,000 -25,500 -177,000 58,000 17,000                                             
      equipment-related expenses
       21,827,000   17,510,000 20,530,000                                                        
      gain on extinguishment of debt
                      3,904,000                                             
      other expense:
                                                                   
      interest and other expense
                       -48 44                                           
      service related expenses
                         1,203 1,174,000 1,106,000 998,000 1,100,000 1,129,000 1,094,000 943,000 955,000 810,000 740,000 751,000                               
      interest expense
                         6,000 6,000 5,000 -9,000 3,000 5,000 6,000 7,000         40,000 45,000 45,000 49,000 54,000 52,000 54,000 55,000 56,000 59,000 110,000 121,000 134,000 122,000 141,000 177,000 260,000 287,000 298,000 304,000 327,000 328,000 411,000 594,000 
      ​
                          23,173,000                                         
      research and development expenses
                                   1,228,750 1,669,000                               
      interest
                                   16,750 19,000 22,000 26,000 14,750 17,000 18,000 24,000                         
      income before income taxes
                                   1,017,500 1,893,000 1,144,000 1,033,000 714,250 1,119,000 1,046,000 692,000 604,500 1,169,000 978,000 271,000 414,000 421,000 1,039,000 196,000 311,000 686,000 420,000 138,000             
      income tax expense
                                   29,500 64,000 -89,000 143,000 120,000 167,000 189,000 124,000 20,750 125,000 2,000 -44,000 37,750 26,000 88,000 37,000 25,750 36,000 52,000 15,000             
      net income per share
                                                                   
      basic
                                   0.053 0.1 0.07 0.05 0.033 0.05 0.05 0.03 0.03 0.06 0.05 0.02 0.02 0.02 0.05 0.01 0.015 0.03 0.02 0.01 -0.003 0.01           
      diluted
                                   0.053 0.1 0.07 0.05 0.033 0.05 0.05 0.03 0.03 0.06 0.05 0.02 0.02 0.02 0.05 0.01 0.015 0.03 0.02 0.01 -0.003 0.01           
      net sales
                                     21,112,000 21,174,000 25,684,000 20,807,000 20,715,000 20,168,000 24,059,000 19,808,000 20,497,000 18,149,000 22,961,000 17,894,000 19,571,000 17,336,000 21,518,000 17,272,000 18,353,000 17,239,000 21,795,000 17,163,000 17,212,000 15,216,000 19,872,000 17,236,000 17,617,000 16,203,000 20,697,000 17,760,000 17,608,000 15,327,000 
      cost of sales
                                     14,272,000 14,295,000 15,838,000 14,144,000 14,098,000 13,716,000 14,421,000 13,700,000 14,296,000 12,512,000 13,618,000 12,548,000 13,468,000 12,081,000 13,242,000 11,955,000 13,272,000 12,200,000 13,500,000 12,511,000 12,571,000 11,080,000 12,835,000 12,172,000 12,722,000 12,047,000 14,222,000 12,247,000 12,918,000 11,904,000 
      other
                                           2,500 3,000 3,000 4,000 3,000 4,000 3,000 -5,000 4,000 4,000 4,000 3,000 4,000 3,000 4,000 3,000 67,000 15,000 13,000 14,000 5,000 13,000 14,000 14,000 
      see accompanying notes to condensed consolidated financial statements.
                                                                   
      loss before benefit for income taxes
                                                          -579,000    -460,000 -225,750   -1,325,000 
      benefit for income taxes
                                                          145,000    293,000 307,000 -379,000 -51,000 -191,000 
      loss per share:
                                                                   
      basic
                                                          -0.02    -0.01 -0.003   -0.06 
      diluted
                                                          -0.02    -0.01 -0.003   -0.06 
      other expense: - sum
                                                           232,750 302,000 311,000 318,000 332,000 341,000 425,000 608,000 
      earnings per share:
                                                                   
      basic
                                                           0.005 0.02 0.02      
      diluted
                                                           0.005 0.02 0.02      
      see accompanying notes to consolidated financial statements.
                                                                   
      impairment of goodwill
                                                                   
      income before benefit for income taxes
                                                                316,000 106,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 
                                                                     
        assets
                                                                     
        current assets
                                                                     
        cash and cash equivalents
      114,408,000 104,919,000 95,400,000 83,081,000 73,413,000 86,019,000 85,596,000 65,341,000 55,518,000 47,311,000 43,577,000 35,955,000 31,515,000 32,007,000 29,448,000 41,730,000 42,127,000 41,951,000 37,744,000 34,806,000 28,710,000 26,796,000 21,870,000 18,248,000 11,040,000 11,778,000 10,774,000 8,028,000 5,499,000 7,921,000 7,469,000 5,308,000 4,347,000 3,949,000 4,453,000 3,454,000 2,428,000 3,784,000 4,715,000 3,805,000 3,294,000 1,881,000 2,806,000 2,346,000 1,675,000 1,710,000 3,741,000 2,483,000 2,425,000 3,379,000 3,706,000 3,229,000 1,856,000 2,377,000 2,327,000 2,979,000 2,997,000 2,254,000 2,972,000 3,077,000 3,640,000 2,777,000 4,711,000 
        marketable securities
      10,544,000 10,462,000 10,358,000 16,095,000 15,884,000 13,176,000 5,666,000 5,398,000 5,348,000 5,324,000 5,121,000 5,136,000 5,155,000 5,028,000 4,943,000 5,068,000 5,245,000 5,417,000 5,435,000 5,413,000 5,361,000                                           
        accounts receivable
      28,527,000 28,064,000 30,670,000 30,108,000 24,250,000 23,456,000 28,236,000 31,898,000 30,273,000 27,552,000 22,921,000 26,069,000 24,170,000 20,985,000 21,342,000 29,218,000 24,209,000 23,531,000 25,343,000 28,081,000 22,355,000 21,223,000 19,206,000 22,932,000 23,346,000 23,098,000 24,730,000 25,970,000 22,369,000 19,845,000 22,104,000 22,738,000 18,057,000 17,361,000 17,746,000 20,275,000 16,930,000 16,267,000 17,311,000 19,012,000 16,137,000 15,639,000 15,269,000 17,994,000 14,622,000 15,352,000 13,930,000 16,904,000 14,213,000 13,704,000 14,288,000 18,211,000 14,532,000 13,888,000 14,549,000 16,408,000 13,737,000 14,410,000 15,178,000 17,640,000 15,447,000 13,736,000 14,657,000 
        inventories
      33,384,000 32,657,000 31,286,000 29,962,000 34,450,000 37,634,000 36,395,000 34,804,000 37,010,000 39,316,000 36,946,000 35,062,000 46,921,000 48,661,000 52,055,000 40,781,000 35,101,000 29,814,000 26,916,000 25,278,000 27,382,000 29,383,000 33,528,000 35,231,000 34,615,000 34,740,000 31,140,000 29,576,000 28,699,000 27,116,000 25,158,000 24,533,000 25,420,000 26,687,000 26,284,000 26,212,000 25,452,000 23,562,000 21,792,000 21,428,000 20,631,000 21,723,000 23,168,000 22,757,000 22,886,000 22,238,000 22,767,000 21,443,000 21,474,000 19,788,000 20,041,000 18,471,000 17,299,000 17,909,000 18,698,000 19,448,000 19,806,000 21,085,000 22,096,000 19,986,000 18,236,000 18,726,000 19,631,000 
        income tax receivable
      2,765,000 1,371,000 1,980,000  958,000 1,195,000 144,000 73,000  367,000 205,000 75,000   379,000    213,000        6,000                24,000  115,000 45,000 169,000 121,000   23,000 64,000 33,000 214,000 137,000  133,000 78,000 368,000  1,225,000 1,207,000 1,102,000 
        prepaid expenses and other current assets
      3,146,000 4,015,000 3,503,000 3,198,000 3,428,000 3,252,000 4,466,000 4,269,000 3,379,000 3,526,000 3,072,000 3,402,000 2,610,000 2,827,000 2,840,000 2,838,000 2,726,000 2,615,000 1,868,000 2,408,000 1,884,000 1,860,000 1,945,000 2,049,000 1,920,000 1,662,000 2,018,000 1,881,000 1,892,000 1,634,000 2,130,000 1,124,000 1,170,000 1,139,000 1,130,000 1,330,000 1,270,000 856,000 920,000 936,000 1,170,000 976,000 957,000 1,046,000 1,283,000 1,053,000 849,000 989,000 1,228,000 1,369,000 1,242,000 1,219,000 949,000 1,045,000 989,000 964,000 791,000 761,000 676,000 950,000 866,000 776,000 960,000 
        total current assets
      192,774,000 181,488,000 173,197,000 162,444,000 152,383,000 164,732,000 171,429,000 168,763,000 158,199,000 149,728,000 137,773,000 131,359,000 130,642,000 119,576,000 121,015,000 119,635,000 109,408,000 103,328,000 97,519,000 95,986,000 85,692,000 79,262,000 76,549,000 78,460,000 70,921,000 71,278,000 68,668,000 65,455,000 58,459,000 56,516,000 56,861,000 53,703,000 48,994,000 49,136,000 49,613,000 51,271,000 46,080,000 44,469,000 45,436,000 45,884,000 42,089,000 41,109,000 43,124,000 45,023,000 41,380,000 41,179,000 42,213,000 42,679,000 40,078,000 38,921,000 39,971,000 41,836,000 35,319,000 36,104,000 37,357,000 40,449,000 38,007,000 39,131,000 41,834,000 42,181,000 39,897,000 37,670,000 41,529,000 
        inventories - non-current
      10,012,000 10,654,000 10,520,000 11,313,000 12,410,000 12,040,000 13,782,000 15,109,000 13,093,000 13,318,000 17,201,000 13,287,000 13,865,000 15,531,000 11,782,000 9,005,000 7,577,000 7,916,000 7,350,000 7,164,000 8,624,000 8,653,000 8,915,000 6,524,000 8,022,000 7,166,000 6,100,000 5,262,000 5,875,000 6,067,000 5,082,000 4,401,000 5,400,000 5,179,000 4,854,000 4,367,000 4,254,000 4,144,000 4,012,000 3,909,000 4,811,000 4,734,000 4,612,000 4,113,000 4,005,000 3,855,000 3,653,000 3,567,000 2,798,000 3,226,000 3,386,000 3,436,000 5,129,000 5,317,000 4,735,000 3,834,000 4,466,000 4,528,000 4,155,000 4,201,000 5,751,000 5,787,000 5,529,000 
        property, plant and equipment
      9,297,000 9,025,000 8,928,000 9,233,000 9,487,000 9,915,000 9,287,000 9,077,000 8,978,000 9,071,000 9,112,000 9,308,000 9,335,000 7,984,000 7,920,000 7,939,000 7,997,000 7,917,000 8,018,000 7,836,000 7,715,000 7,842,000 7,914,000 8,088,000 8,105,000 8,151,000 7,580,000 7,694,000 7,602,000 7,405,000 6,969,000 6,791,000 6,818,000 6,710,000 6,820,000 6,543,000 6,512,000 6,207,000 5,974,000 6,049,000 6,033,000 6,091,000 6,162,000 6,234,000 6,262,000 6,306,000 6,295,000 6,394,000 6,517,000 6,512,000 6,495,000 6,586,000 6,793,000 6,963,000 7,060,000 7,247,000 7,373,000 7,432,000 7,519,000 7,741,000 7,763,000 7,863,000 7,939,000 
        intangible assets
      3,064,000 3,138,000 3,213,000 3,287,000 3,366,000 3,445,000 3,523,000 3,602,000 3,686,000 3,771,000 3,855,000 3,939,000 4,029,000 4,119,000 4,210,000 4,300,000 4,398,000 4,495,000 4,593,000 4,691,000 4,797,000 4,903,000 5,010,000 5,116,000 7,034,000 7,100,000 7,166,000 7,232,000 7,310,000 7,388,000 7,467,000 7,545,000 7,638,000 7,731,000 7,823,000 7,916,000 8,026,000 8,137,000 8,247,000 8,357,000 8,488,000 8,618,000 8,749,000 8,886,000 9,052,000 9,219,000 9,386,000 9,552,000 9,748,000 9,943,000 10,138,000 10,334,000 10,563,000 10,792,000 11,021,000 11,251,000 11,517,000 11,783,000 12,050,000 12,316,000 13,004,000 13,293,000 13,581,000 
        deferred income taxes
      1,697,000 3,277,000 4,795,000 6,476,000 7,752,000 7,012,000 6,177,000 5,428,000 4,983,000 4,057,000 2,732,000 2,652,000 1,234,000 828,000 251,000 166,000 369,000 443,000 368,000 347,000 167,000 30,000 22,000 112,000 649,000 563,000 260,000 72,000 82,000 655,000 602,000 564,000 1,093,000 1,461,000 484,000    698,000 703,000 857,000 890,000 900,000 880,000 799,000 781,000 757,000 739,000 738,000 681,000 671,000 642,000 650,000 671,000 657,000 650,000 543,000 543,000 544,000 528,000 483,000 448,000 468,000 
        operating lease - right-of-use asset
      4,975,000 5,045,000 5,116,000 5,188,000 5,261,000 5,335,000 5,410,000 5,487,000                                                        
        other assets
      190,000 196,000 198,000 200,000 204,000 205,000 283,000 286,000 289,000 291,000 294,000 312,000 299,000 364,000 374,000 347,000 370,000 373,000 331,000 243,000 246,000 249,000 250,000 255,000 257,000 259,000 262,000 265,000 267,000 270,000 267,000 265,000 267,000 270,000 151,000 121,000 140,000 127,000 176,000 134,000 160,000 163,000 144,000 147,000 159,000 156,000 158,000 167,000 172,000 179,000 189,000 185,000 188,000 181,000 227,000 207,000 277,000 292,000 288,000 273,000 316,000 295,000 396,000 
        total assets
      222,009,000 212,823,000 205,967,000 198,141,000 190,863,000 202,684,000 209,891,000 207,752,000 194,792,000 185,878,000 176,689,000 166,654,000 165,282,000 154,363,000 151,598,000 148,576,000 137,106,000 131,391,000 125,178,000 123,293,000 114,453,000 108,293,000 106,028,000 105,838,000 101,740,000 101,360,000 97,448,000 85,908,000 79,595,000 78,301,000 77,248,000 73,269,000 70,210,000 70,487,000 69,745,000 70,862,000 66,005,000 64,039,000 64,246,000 64,769,000 62,399,000 61,460,000 63,416,000 65,037,000 61,712,000 61,680,000 62,637,000 63,364,000 60,846,000 60,322,000 61,730,000 63,903,000 59,866,000 61,027,000 62,118,000 64,750,000 63,493,000 65,158,000 67,877,000 68,795,000 68,672,000 66,580,000 70,678,000 
        liabilities and stockholders' equity
                                                                     
        current liabilities
                                                                     
        accounts payable
      5,786,000 5,853,000 5,900,000 5,742,000 5,401,000 4,551,000 5,936,000 7,977,000 6,913,000 8,288,000 11,084,000 8,061,000 7,005,000 8,110,000 13,440,000 11,072,000 9,935,000 10,109,000 6,217,000 6,095,000 5,669,000 4,402,000 5,094,000 6,547,000 5,348,000 6,534,000 5,952,000 5,135,000 4,856,000 4,994,000 4,812,000 4,807,000 4,180,000 4,488,000 4,306,000 5,653,000 4,442,000 4,777,000 4,220,000 4,328,000 3,203,000 2,891,000 3,468,000 3,954,000 3,866,000 3,604,000 3,846,000 4,082,000 4,001,000 3,030,000 4,162,000 3,318,000 3,224,000 3,712,000 3,707,000 3,163,000 3,309,000 4,400,000 5,892,000 4,649,000 4,062,000 3,562,000 4,534,000 
        accrued expenses
      7,999,000 7,702,000 8,781,000 8,712,000 8,776,000 8,680,000 9,446,000 10,345,000 9,737,000 9,844,000 7,636,000 8,079,000 7,648,000 7,215,000 7,907,000 9,489,000 8,223,000 6,713,000 6,169,000 6,582,000 5,185,000 5,273,000 4,672,000 5,744,000 5,849,000 5,962,000 6,252,000 6,273,000 5,298,000 5,481,000 5,821,000 2,112,000 1,806,000 2,177,000 1,941,000 2,209,000 1,837,000 1,699,000 1,783,000 1,893,000 1,523,000 1,574,000 1,528,000 1,624,000 1,710,000 1,570,000 1,829,000 1,737,000 1,489,000 1,857,000 1,780,000 2,093,000 1,054,000 1,472,000 1,345,000 1,814,000 1,658,000 1,731,000 2,118,000 2,553,000 2,610,000 1,973,000 2,038,000 
        accrued litigation costs
      16,000,000                                                               
        accrued salaries and wages
      3,834,000 4,172,000 4,853,000 4,398,000 3,967,000 4,032,000 4,694,000 3,907,000 3,095,000 3,079,000 3,176,000 3,546,000 2,843,000 2,383,000 2,633,000 4,064,000 3,261,000 2,574,000 3,315,000 3,478,000 2,527,000 2,114,000 2,794,000 2,181,000 2,212,000 2,461,000 2,886,000 2,416,000 2,072,000 2,166,000 2,363,000 2,190,000 1,846,000 1,876,000 2,086,000 2,322,000 2,139,000 2,285,000 2,405,000 2,467,000 2,097,000 1,807,000 2,363,000 2,250,000 1,878,000 1,743,000 1,958,000 1,824,000 1,652,000 1,597,000 1,952,000 1,604,000 1,420,000 1,409,000 1,551,000 1,589,000 1,426,000 1,337,000 1,537,000 1,785,000 1,755,000 1,452,000 1,901,000 
        dividends payable
      5,357,000 4,993,000 4,992,000 4,992,000                                                            
        accrued income taxes
         213,000 1,327,000 1,223,000 1,136,000 1,122,000 203,000 1,082,000 1,133,000  287,000 291,000  1,868,000 1,321,000 18,000  1,635,000 596,000 606,000 861,000 1,148,000 462,000 123,000 292,000 548,000 548,000 601,000 129,000 293,000 672,000 976,000 88,000 289,000 290,000 84,000 39,000 8,000 253,000 89,000  5,000 190,000 190,000 169,000 169,000 102,000 22,000 157,000 153,000 154,000 126,000 126,000 78,000 120,000 120,000 177,000 165,000 63,000 121,000 118,000 
        total current liabilities
      38,976,000 22,720,000 24,526,000 24,057,000 22,612,000 21,817,000 24,686,000 22,229,000 19,948,000 21,211,000 21,896,000 19,686,000 17,783,000 17,999,000 23,980,000 26,493,000 22,740,000 19,414,000 15,701,000 20,176,000 15,712,000 13,479,000 13,855,000 17,414,000 13,871,000 15,080,000 15,090,000 14,372,000 12,774,000 13,242,000 13,125,000 9,402,000 8,504,000 9,517,000 8,421,000 10,473,000 8,708,000 9,145,000 8,747,000 8,996,000 8,001,000 7,611,000 8,959,000 9,433,000 9,054,000 8,517,000 9,233,000 9,243,000 8,844,000 8,106,000 9,494,000 8,615,000 7,298,000 8,193,000 8,203,000 8,244,000 18,565,000 19,640,000 21,719,000 12,996,000 11,999,000 9,666,000 12,045,000 
        operating lease liability
      5,217,000 5,255,000 5,295,000 5,335,000 5,376,000 5,417,000 5,460,000 5,512,000                                                        
        total liabilities
      44,227,000 28,009,000 29,854,000  29,315,000 28,457,000 31,282,000 28,863,000 26,606,000 27,894,000 28,677,000 26,485,000 24,587,000 24,867,000 30,883,000 34,785,000 31,122,000 27,866,000 24,084,000 30,056,000 26,404,000 24,688,000 25,704,000 27,937,000 21,930,000 23,058,000 23,026,000 14,736,000 13,188,000 13,656,000 13,539,000 9,816,000 10,504,000 11,517,000 11,921,000 13,973,000 12,208,000 11,195,000 12,372,000 13,496,000 14,576,000 14,261,000 16,659,000 18,533,000 18,244,000 18,107,000 19,202,000 19,612,000 19,613,000 19,770,000 21,551,000 23,568,000 22,652,000 23,919,000 24,829,000 27,027,000 27,611,000 29,579,000 32,608,000 33,366,000 34,660,000 33,278,000 37,547,000 
        commitments and contingencies
                                                                     
        stockholders' equity
                                                                     
        common stock, par value 0.01 per share...
      398,000 398,000 398,000 398,000 398,000 398,000 398,000 398,000 398,000 397,000 397,000 397,000 397,000 396,000 396,000 396,000 396,000 396,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 212,000 211,000 211,000 211,000 211,000 211,000 210,000 210,000 210,000 210,000 210,000 210,000 210,000 210,000 210,000 208,000 208,000 208,000 201,000 201,000 201,000 201,000 201,000 201,000 201,000 201,000 201,000 
        additional paid-in capital
      24,523,000 25,774,000 25,589,000 25,280,000 24,909,000 24,523,000 24,137,000 23,712,000 22,855,000 22,163,000 21,860,000 21,553,000 21,220,000 20,862,000 20,527,000 20,005,000 19,735,000 19,700,000 18,306,000 18,201,000 18,038,000 17,954,000 17,870,000 17,766,000 17,671,000 17,428,000 17,120,000 17,103,000 17,066,000 17,066,000 16,910,000 16,890,000 16,840,000 16,790,000 16,683,000 16,638,000 16,768,000 16,768,000 16,655,000 16,622,000 16,611,000 16,611,000 16,165,000 16,133,000 16,133,000 16,133,000 16,065,000 16,032,000 15,848,000 15,818,000 15,812,000 15,356,000 15,444,000 15,449,000 14,080,000 14,080,000 14,080,000 14,080,000 14,079,000 14,072,000 14,058,000 14,043,000 14,029,000 
        retained earnings
      209,001,000 214,766,000 206,256,000 199,083,000 192,443,000 186,788,000 180,875,000 174,300,000 164,454,000 154,945,000 145,276,000 137,740,000 138,599,000 127,759,000 119,313,000 112,911,000 105,374,000 102,950,000 102,097,000 94,345,000 89,320,000 84,960,000 81,763,000 79,444,000 81,344,000 77,729,000 74,157,000 70,924,000 66,196,000 63,074,000 60,205,000 59,420,000 55,723,000 53,894,000 52,661,000 51,771,000 48,549,000 47,597,000 46,740,000 46,172,000 42,734,000 41,690,000 40,714,000 40,399,000 37,059,000 36,664,000 35,713,000 35,554,000 33,219,000 32,568,000 32,201,000 32,078,000 28,869,000 28,758,000 28,623,000 29,057,000 27,216,000 26,913,000 26,604,000 26,771,000 25,368,000 24,673,000 24,516,000 
        treasury stock
      -56,315,000 -56,315,000 -56,315,000                                                             
        accumulated other comprehensive income
      175,000 191,000 185,000 160,000 113,000 47,000                                                          
        total stockholders' equity
      177,782,000 184,814,000 176,113,000 168,606,000                    77,901,000 79,810,000 78,302,000 74,422,000 71,172,000 66,407,000 64,645,000 63,709,000 63,453,000 59,706,000 58,970,000 57,824,000 56,889,000 53,797,000 52,844,000 51,874,000 51,273,000 47,823,000 47,199,000 46,757,000 46,504,000 43,468,000 43,573,000 43,435,000 43,752,000 41,233,000 40,552,000 40,179,000 40,335,000 37,214,000 37,108,000 37,289,000 37,723,000 35,882,000 35,579,000 35,269,000 35,429,000 34,012,000 33,302,000 33,131,000 
        total liabilities and stockholders' equity
      222,009,000 212,823,000 205,967,000 198,141,000                    105,838,000 101,740,000 101,360,000 97,448,000 85,908,000 79,595,000 78,301,000 77,248,000 73,269,000 70,210,000 70,487,000 69,745,000 70,862,000 66,005,000 64,039,000 64,246,000 64,769,000 62,399,000 61,460,000 63,416,000 65,037,000 61,712,000 61,680,000 62,637,000 63,364,000 60,846,000 60,322,000 61,730,000 63,903,000 59,866,000 61,027,000 62,118,000 64,750,000 63,493,000 65,158,000 67,877,000 68,795,000 68,672,000 66,580,000 70,678,000 
        investments - other
            10,926,000 26,980,000 26,671,000 26,332,000 25,931,000 25,660,000 20,271,000 10,068,000 10,008,000                                                 
        total liabilities and stockholders’ equity
         29,535,000 190,863,000 202,684,000 209,891,000 207,752,000 194,792,000 185,878,000 176,689,000 166,654,000 165,282,000 154,363,000 151,598,000 148,576,000 137,106,000 131,391,000 125,178,000 123,293,000 114,453,000 108,293,000 106,028,000                                         
        less: treasury stock, at cost
         -56,315,000 -56,315,000 -37,529,000 -26,801,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,521,000 -19,417,000 -17,067,000 -17,067,000 -17,067,000 -17,067,000 -15,707,000 -13,618,000 -13,069,000 -13,069,000 -11,926,000 -11,732,000 -11,732,000 -11,732,000 -11,732,000 -11,732,000 -11,732,000 -11,733,000 -11,313,000 -10,332,000 -10,238,000 -9,934,000 -9,434,000 -8,553,000 -8,044,000 -8,044,000 -8,044,000 -8,044,000 -7,307,000 -7,307,000 -7,307,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 -5,615,000 
        dividend payable
          4,468,000 4,554,000 4,610,000                                                         
        stockholders’ equity
                                                                     
        total stockholders’ equity
          161,548,000 174,227,000 178,609,000 178,889,000 168,186,000 157,984,000 148,012,000 140,169,000 140,695,000 129,496,000 120,715,000 113,791,000 105,984,000 103,525,000 101,094,000 93,237,000 88,049,000 83,605,000 80,324,000                                         
        right-of-use asset
              5,564,000 5,642,000                                                      
        long term right-of-use liability
              5,556,000 5,601,000                                                      
        operating lease asset
                5,722,000 5,797,000 5,878,000 5,961,000 6,046,000 7,350,000 7,356,000 7,362,000 7,367,000 7,373,000 7,379,000 7,384,000 7,390,000 7,395,000 7,401,000                                       
        long term operating lease liabilities
                5,648,000 5,689,000 5,737,000 5,786,000 5,836,000 7,068,000 7,073,000 7,079,000 7,085,000 7,090,000 7,096,000 7,102,000 7,107,000 7,113,000 7,118,000                                       
        current portion of long-term debt
                         2,386,000 1,735,000 1,084,000 434,000 1,794,000                                        
        long term debt, net of current portion
                         1,518,000 2,169,000 2,820,000                                          
        ​
                                                                     
        long-term debt
                            3,470,000          2,000,000 2,000,000 3,500,000 3,500,000 3,500,000 2,050,000 3,625,000 4,500,000 6,575,000 6,650,000 7,700,000 9,100,000 9,000,000 9,400,000 9,800,000 10,200,000 10,600,000 11,500,000 11,900,000 14,800,000 15,200,000 15,600,000 16,500,000 18,657,000 8,926,000 9,819,000 10,712,000 20,205,000 22,598,000 23,491,000 25,384,000 
        long term debt
                             2,110,000                                        
        operating lease right-of-use asset
                               7,406,000                                      
        operating lease liabilities
                               7,123,000 7,384,000                                     
        operating right of use lease asset
                                7,672,000                                     
        commitments and contingencies stockholders' equity
                                                                     
        current maturities of long term debt
                                           300,000 300,000 300,000 925,000 1,250,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000 1,600,000    3,572,000    
        stockholders' equity - sum
                                            63,606,000  59,556,000 58,512,000        48,596,000       41,497,000 41,194,000 40,884,000 41,044,000 39,627,000 38,917,000 38,746,000 
        see accompanying notes to condensed consolidated financial statements.
                                                                     
        current maturities of long-term debt
                                                              12,172,000 12,172,000 12,172,000  3,572,000 2,679,000 3,572,000 
        income tax payable
                                                                     
        see accompanying notes to consolidated financial statements.
                                                                     
        loan payable
                                                                     
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 
                                                                     
          ​
                           13,848,000                                         
          cash flows from operating activities
                                                                     
          net income
        12,165,000 11,632,000 10,122,000 10,467,000 11,185,000 13,534,000 13,196,000 12,610,000 10,478,000 1,439,000 10,840,000 8,446,000 6,402,000 7,537,000 3,273,000 1,037,000 7,752,000 5,025,000 4,360,000 3,197,000 2,319,000 -1,900,000 3,615,000 3,572,000 3,233,000 4,728,000 3,122,000 2,869,000 1,504,000 3,697,000 1,829,000 1,233,000 890,000 3,222,000 952,000 857,000 568,000 3,438,000 1,044,000 976,000 315,000 3,340,000 395,000 951,000 159,000 2,335,000 650,000 368,000 123,000 3,021,000 111,000 135,000 -434,000 1,841,000 303,000 309,000 -167,000 1,403,000 695,000 157,000 -1,134,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                     
          depreciation and amortization
        570,000 571,000 572,000 584,000 549,000 536,000 539,000 551,000 537,000 532,000 470,000 471,000 457,000 451,000 436,000 446,000 438,000 429,000 412,000 428,000 427,000 377,000 374,000 380,000 364,000 377,000 364,000 341,000 327,000 383,000 354,000 342,000 330,000 381,000 344,000 327,000 322,000 382,000 350,000 344,000 344,000 427,000 393,000 378,000 372,000 463,000 440,000 422,000 415,000  493,000 490,000 484,000  558,000 544,000 536,000  575,000 567,000 561,000 
          change in accrued interest on other investments
                                                                     
          unrealized gain on marketable securities
                 57,000 -95,000 -35,000 153,000                                                 
          realized gain on sales of marketable securities
        -92,000                                                             
          recovery of credit losses
        -1,000                                                             
          change to inventory reserve
        -354,000 565,000 262,000 51,000 -235,000 1,057,000 -86,000 -102,000 822,000 -1,405,000 610,000 279,000 71,000 856,000                                                
          deferred income taxes
        1,681,000 1,276,000 -740,000 -835,000 -749,000 -445,000 -926,000 -1,325,000 -80,000 -1,418,000 -406,000 -577,000 -417,000 -203,000 -107,000 75,000 21,000 180,000 137,000 8,000 -90,000 -537,000 86,000 303,000 188,000 82,000 573,000 -53,000 153,000 529,000 368,000 -977,000 160,000 215,000 -38,000 144,000 40,000 536,000 -40,000 -110,000 -11,000 139,000 93,000 -57,000 55,000 527,000 -49,000 -54,000  -183,000 34,000 37,000  139,000 40,000 36,000  -304,000 52,000 118,000 
          stock-based compensation expense
        309,000                                                             
          changes in operating assets and liabilities:
                                                                     
          accounts receivable
        -561,000 -5,863,000 -794,000 4,783,000 3,671,000 -1,552,000 -2,730,000 -4,620,000 3,172,000 -1,905,000 -3,095,000 358,000 7,903,000 -5,026,000 -678,000 1,812,000 2,738,000 -5,756,000 -1,132,000 -1,887,000 3,726,000 414,000 -447,000 1,593,000 1,240,000 -3,571,000 -2,540,000 2,266,000 2,405,000 -4,696,000 -701,000 385,000 2,509,000 -3,355,000 -663,000 1,039,000 1,706,000 -2,885,000 -543,000 -360,000 2,800,000 -3,443,000 715,000 -1,417,000 2,989,000 -2,691,000 -459,000 584,000 3,913,000  -644,000 641,000 1,859,000  668,000 773,000 2,462,000  -1,808,000 986,000 3,083,000 
          inventories
        -177,000 5,022,000 2,551,000 452,000 -30,000 -867,000 2,617,000 1,615,000 -6,620,000 13,842,000 2,796,000 -634,000 -14,121,000 -7,965,000 -6,022,000 -3,463,000 -1,824,000 3,045,000 2,030,000 4,407,000 -688,000 1,006,000 -731,000 -4,666,000 -2,402,000 8,000 -1,391,000 -2,943,000 -1,665,000 1,098,000 1,046,000 -728,000 -559,000 -416,000 -2,000,000 -1,902,000 -467,000 560,000 1,015,000 1,323,000 -910,000 493,000 -798,000 327,000 -1,410,000 339,000 -1,383,000 338,000 -1,570,000  798,000 207,000 -151,000  1,341,000 638,000 -2,064,000  27,000 647,000 -1,078,000 
          prepaid expenses and other current assets
        -305,000 230,000 -176,000 1,214,000 -197,000 -890,000 147,000 -454,000 330,000 -792,000 217,000 13,000 -2,000 -112,000 -111,000 -747,000 540,000 -524,000 -24,000 85,000 104,000 -129,000 -257,000 355,000 -137,000 11,000 -258,000 496,000 69,000 46,000 -30,000 -10,000 200,000 -60,000 -414,000 64,000 16,000 234,000 -194,000 -19,000 89,000 238,000 -231,000 -204,000 140,000 239,000 141,000 -127,000 -23,000  97,000 -57,000 -24,000  -30,000 -85,000 274,000  -91,000 185,000 -13,000 
          income tax receivable
        -1,993,000 953,000 224,000 -1,058,000 -71,000 -73,000 367,000 -162,000 -130,000    -379,000                            -23,000 114,000 -69,000 124,000 -48,000 -121,000 23,000 41,000  181,000 -77,000 -137,000  -55,000 290,000 -368,000  -17,000 -106,000 -317,000 
          other assets
        4,000 2,000 3,000 78,000 3,000 3,000 2,000 3,000 17,000 -13,000 65,000 10,000 -27,000 24,000 3,000 -41,000 -89,000         -6,000 -5,000 -121,000 -30,000    -45,000    8,000 -7,000 5,000 2,000   -7,000  -10,000 42,000 -23,000  2,000 -17,000 -29,000  -37,000 88,000 -83,000 
          accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes
        391,000 -231,000 1,018,000 -2,694,000 -2,113,000 2,334,000 -1,210,000 -703,000 2,267,000 1,979,000 -197,000 -5,931,000 -2,432,000 3,870,000 3,262,000 3,925,000 -2,295,000 3,478,000 1,585,000 -1,020,000 -2,137,000 2,646,000 -1,210,000 2,000 424,000 1,548,000 -469,000 117,000 332,000                               -1,484,000 -986,000 
          net cash from operating activities
        11,637,000 14,624,000 13,379,000 13,499,000 12,025,000 14,336,000 12,339,000 7,484,000 11,209,000 12,284,000 11,328,000 3,053,000 -1,965,000 -81,000 612,000 4,338,000 3,463,000 6,556,000 7,494,000 5,172,000 3,765,000 3,691,000 1,801,000 1,886,000 2,927,000 2,890,000 -583,000 3,227,000 3,119,000 3,178,000 1,863,000 1,323,000 1,501,000 1,459,000 -1,971,000 1,041,000 1,919,000 3,474,000 2,392,000 1,207,000 2,087,000 1,104,000 1,043,000 -530,000 2,270,000 475,000 172,000 314,000 3,782,000  -24,000 1,425,000 1,570,000  1,855,000 352,000 822,000  1,035,000 1,042,000 174,000 
          capital expenditures
        -193,000 -237,000 -65,000 -1,134,000 -680,000 -551,000 -361,000 -426,000 -256,000 -415,000 -1,731,000 -444,000 -372,000 -293,000 -418,000 -249,000 -522,000 -441,000 -177,000 -246,000 -143,000 -290,000 -262,000 -882,000 -181,000 -390,000 -479,000 -695,000 -424,000 -262,000 -367,000 -137,000 -514,000 -299,000 -535,000 -446,000 -134,000 -263,000 -159,000 -138,000 -133,000 -229,000 -178,000 -220,000 -103,000 -141,000 -246,000 -241,000 -125,000  -92,000 -159,000 -65,000  -219,000 -177,000 -34,000  -172,000 -190,000 -92,000 
          free cash flows
        11,444,000 14,387,000 13,314,000 12,365,000 11,345,000 13,785,000 11,978,000 7,058,000 10,953,000 11,869,000 9,597,000 2,609,000 -2,337,000 -374,000 194,000 4,089,000 2,941,000 6,115,000 7,317,000 4,926,000 3,622,000 3,401,000 1,539,000 1,004,000 2,746,000 2,500,000 -1,062,000 2,532,000 2,695,000 2,916,000 1,496,000 1,186,000 987,000 1,160,000 -2,506,000 595,000 1,785,000 3,211,000 2,233,000 1,069,000 1,954,000 875,000 865,000 -750,000 2,167,000 334,000 -74,000 73,000 3,657,000  -116,000 1,266,000 1,505,000  1,636,000 175,000 788,000  863,000 852,000 82,000 
          cash flows from investing activities
                                                                     
          purchases of property, plant, and equipment
        -193,000 -237,000 -65,000 -1,134,000 -680,000 -551,000 -361,000 -426,000 -256,000 -415,000 -1,731,000 -444,000 -372,000 -293,000 -418,000 -249,000 -522,000 -441,000 -177,000 -246,000 -143,000 -290,000 -262,000 -882,000 -181,000 -390,000 -479,000 -695,000 -424,000 -262,000 -367,000 -137,000 -514,000 -299,000 -535,000 -446,000 -134,000 -263,000 -159,000 -138,000 -133,000 -229,000 -178,000 -220,000 -103,000 -141,000 -246,000 -241,000 -125,000  -92,000 -159,000 -65,000  -219,000 -177,000 -34,000  -172,000 -190,000 -92,000 
          purchases of marketable securities
        -2,540,000 -2,613,000 -2,580,000 -7,531,000 -111,000 -46,000 -43,000 -75,000 -42,000 -38,000    -23,000 -18,000 -21,000 -19,000 -19,000                                            
          proceeds from sales of marketable securities
        8,407,000                                                             
          purchases of other investments
          -32,000 -46,000 -228,000 -468,000 -308,000 -347,000 -5,096,000                                                    
          redemption of other investments
         -272,000 10,959,000 16,293,000                                                        
          net cash from investing activities
        5,674,000 -488,000 -2,645,000 2,262,000 15,456,000 -825,000 -872,000 -809,000 -645,000 -5,549,000 -11,857,000 -494,000 -10,362,000 -316,000 -436,000 -270,000 -541,000 -460,000 -5,580,000 -246,000 -143,000 -292,000 -260,000 -882,000 -181,000 -390,000 -479,000 -695,000 -424,000 -262,000 -367,000 -137,000 -514,000 -299,000 -535,000 -446,000 -134,000 -263,000 -159,000 -138,000 -133,000 -229,000 -178,000 -220,000 -103,000 -141,000 -246,000 -241,000 -125,000  -92,000 -159,000 -65,000  -219,000 -177,000 -34,000  -172,000 -190,000 -92,000 
          cash flows from financing activates
                                                                     
          proceeds from stock option exercises
         54,000    3,000 37,000 45,000 139,000 16,000     9,000    29,000 9,000 15,000                                 
          dividends paid
        -4,992,000                                                             
          repurchase of common stock
                                                                     
          net cash from financing activities
        -4,992,000 -4,468,000 -23,340,000 -15,338,000 -7,226,000 -3,688,000 -3,260,000 -2,941,000 -2,942,000 -2,295,000 37,000 45,000 139,000 16,000     3,809,000    29,000 -1,360,000 -2,080,000 -534,000 -1,955,000 -1,098,000 -1,690,000 12,000 -134,000 1,150,000 -1,526,000 -875,000 -2,700,000 -820,000 -1,994,000 -1,494,000 -204,000 -900,000 -1,281,000 -909,000 -276,000 -880,000 -400,000 -3,180,000  -405,000 -1,216,000 -2,157,000  -893,000 -893,000 -893,000  -2,786,000 -893,000 
          net increase in cash and cash equivalents
        12,319,000 9,668,000 -12,606,000 423,000 20,255,000 9,823,000 8,207,000 3,734,000 7,622,000 4,440,000 -492,000 2,559,000 -12,282,000 -397,000 176,000 4,207,000 2,938,000 6,096,000             398,000 -504,000 999,000    910,000    460,000   -2,031,000 1,258,000   -327,000 477,000          863,000 -1,934,000 -811,000 
          cash and cash equivalents - beginning
        83,081,000 65,341,000 35,955,000 41,730,000 34,806,000 18,248,000 8,028,000 5,308,000 3,454,000 3,805,000 2,346,000 2,483,000 3,229,000  2,979,000  3,077,000  5,522,000 
          cash and cash equivalents - ending
        95,400,000 9,668,000 -12,606,000 423,000 85,596,000 9,823,000 8,207,000 3,734,000 43,577,000 4,440,000 -492,000 2,559,000 29,448,000 -397,000 176,000 4,207,000 37,744,000 6,096,000 1,914,000 4,926,000 21,870,000 7,208,000 -738,000 1,004,000 10,774,000 2,529,000 -2,422,000 452,000 7,469,000 961,000 398,000 -504,000 4,453,000 1,026,000 -1,356,000 -931,000 4,715,000 511,000 1,413,000 -925,000 2,806,000 671,000 -35,000 -2,031,000 3,741,000 58,000 -954,000 -327,000 3,706,000  -521,000 50,000 2,327,000  743,000 -718,000 2,972,000  863,000 -1,934,000 4,711,000 
          supplemental cash flow information
                                                                     
          interest paid
           7,000 8,000 6,000 4,000   4,000 4,000 4,000 4,000 4,000 4,000 4,000 4,000 4,000 4,000 4,000 6,000 5,000 6,000 5,000 13,000 5,000 1,000   19,000 18,000 24,000 21,000 23,000 16,000 20,000 29,000 42,000 44,000 46,000 52,000 53,000 52,000 54,000 56,000 47,000 25,000 113,000 127,000  111,000 131,000 111,000  188,000 460,000 290,000  305,000 384,000 558,000 
          income taxes paid
        3,104,000 77,000 2,299,000 3,431,000 2,620,000 1,893,000 2,272,000 3,462,000 1,703,000 2,390,000 1,952,000 1,071,000 3,398,000 14,000 -15,000 2,169,000 123,000 496,000 708,000 643,000 14,000 1,000 -1,000 735,000 4,000 -1,000 259,000 2,000 184,000 1,000 53,000     -3,000 2,000 30,000 24,000  31,000  3,000 464,000  5,000 
          non-cash investing and financing transactions
                                                                     
          dividends declared and not paid
        4,992,000                                                             
          gain on disposal of fixed asset
                 -15,000                                                 
          unrealized (gain) loss on marketable securities
         -46,000 -49,000 75,000 -157,000 -4,000 19,000                                                       
          realized (gain) loss on sales of marketable securities
                                                                     
          (recovery of) credit losses
         5,000 -3,000 -9,000                                                         
          proceeds from disposal of fixed asset
                 38,000                                                 
          interest income on other investments
          -1,000 -193,000 -81,000 129,000 -93,000 76,000 -293,000                                                    
          stock based compensation expense
          386,000 386,000 371,000 857,000 266,000 303,000 307,000 330,000 322,000 335,000 477,000 270,000 35,000 1,255,000 89,000 163,000 84,000 84,000 104,000 86,000   17,000      5,000 103,000 33,000  -1,000 65,000 33,000  60,000 32,000  68,000 33,000  10,000 6,000 1,000      1,000 7,000  14,000 15,000 23,000 
          cash flows from financing activities
                                                                     
          cash paid for dividend
          -4,554,000   -3,688,000 -3,687,000 -2,941,000 -2,942,000                                                     
          cash paid for purchase of treasury shares
          -18,786,000 -10,728,000 -7,280,000                                                         
          cash dividends declared and not paid
          -87,000 -56,000 4,610,000                                                         
          (recovery of) benefit from credit losses
                                                                     
          gain on extinguishment of debt
                     -3,904,000                                             
          (recovery) of credit losses
              9,000 -11,000 -24,000                                                     
          unrealized loss on marketable securities
                57,000     200,000                                                
          (recovery) reserve of credit losses
                                                                     
          interest (income) on other investments
                   -60,000 -8,000                                                 
          purchases of marketable securities and other investments
                   -50,000 -10,028,000                                                 
          benefit from (recovery of) doubtful accounts
                    -27,000                                                 
          impairment of intangible asset
                                                                     
          proceeds from long-term debt
                                                                     
          cash paid for purchase of treasury stock
                             -104,000    -1,360,000 -2,089,000 -549,000 -1,143,000       -420,000 -594,000 -94,000 -304,000 -500,000 -881,000 -509,000 -285,000            
          (recovery of) benefit from doubtful accounts
                         30,000         -7,000 -6,000                                 
          loss on marketable securities
                         -33,000                                            
          gain on marketable securities
                        -3,000                                             
          change to inventory obsolescence reserve
                                                                     
          surrender of common shares
                                 3,000   4,000 4,000 3,000                             
          net change in cash and cash equivalents
                           4,926,000 3,622,000 7,208,000 -738,000 1,004,000 2,746,000 2,529,000 -2,422,000 452,000 2,161,000                                 
          customer relationships
                           9,800,000                                         
          trade name
                           4,048,000                                         
          benefit from doubtful accounts
                                -29,000    15,000 5,000 20,000    -5,000 10,000 45,000 -10,000 -75,000 71,000 15,000 -5,000 -15,000 -50,000 10,000         97,000   
          benefit from (recovery) doubtful accounts
                                                                     
          (recovery of) doubtful accounts
                                                                     
          non-cash stock based compensation expense
                                 8,000 147,000 5,000                                 
          principal payments on long-term debt
                                     -2,000,000   -350,000 -1,575,000 -875,000 -2,700,000 -400,000 -1,400,000 -1,400,000 -400,000 -400,000 -400,000 -400,000 -400,000 -900,000 -400,000 -2,900,000  -400,000 -900,000 -2,157,000  -893,000 -893,000 -893,000  -2,786,000 -893,000 
          tax deficiency from stock-based awards
                                                                     
          accounts payable, accrued expenses and accrued income taxes
                                      -1,013,000 1,096,000 -2,052,000  -135,000 397,000 -249,000  715,000 -998,000 -474,000  537,000                   
          proceeds from long-term debt borrowings
                                                                     
          proceeds from stock option exercise
                                      45,000 4,000 12,000                            
          non-cash financing activities:
                                                                     
          shares surrendered and held in treasury for common stock options exercised
                                                     28,000             
          shares surrendered and cancelled for shares for common stock options exercised
                                          42,000            424,000             
          net (decrease) in cash and cash equivalents
                                                                     
          charge to obsolescence reserve
                                                                     
          proceeds from exercise of employee stock options
                                                                     
          tax benefit from stock option exercise
                                                          -5,000           
          change in inventory obsolescence reserve
                                                      125,000 75,000 50,000             
          proceeds from exercise of stock options
                                                      20,000 5,000             
          net decrease in cash and cash equivalents
                                                          -521,000 50,000 -652,000  743,000 -718,000 -105,000     
          accounts payable and accrued expenses
                                                    -10,000  744,000 -1,382,000 883,000  -867,000 -10,000 -41,000  -1,076,000 -2,136,000 135,000     
          see accompanying notes to condensed consolidated financial statements.
                                                                     
          common stock
                                                                     
          high
                                                         3,440            
          low
                                                         2,900            
          plan category
                                                                     
          equity compensation plans approved by security holders:
                                                         681,140,000            
          equity compensation plans not approved by security holders:
                                                                     
          total
                                                         681,140,000            
          statement of earnings data:
                                                                     
          net sales
                                                         71,386,000            
          gross profit
                                                         21,724,000            
          impairment of goodwill and intangible assets
                                                                     
          income from operations
                                                         3,796,000            
          cash flow data:
                                                                     
          net cash flows from operating activities
                                                         4,899,000            
          net cash flows used in investing activities
                                                         -383,000            
          net cash flows from financing activities
                                                         -4,266,000            
          per share data:
                                                                     
          net earnings per common share:
                                                                     
          basic
                                                         160            
          diluted
                                                         160            
          weighted-average common shares outstanding:
                                                                     
          cash dividends declared per common share
                                                                     
          balance sheet data:
                                                                     
          working capital
                                                         33,221,000            
          total assets
                                                         63,903,000            
          long-term debt
                                                         14,800,000            
          stockholders' equity
                                                         40,335,000            
          tax at the u.s. federal statutory rate
                                                         1,091,000            
          increases (decreases) in taxes resulting from:
                                                                     
          meals and entertainment
                                                         59,000            
          state income taxes, net of federal income tax benefit
                                                         21,000            
          foreign source income not subject to tax
                                                         -740,000            
          r&d credits
                                                         -221,000            
          other
                                                         -23,000            
          effective tax rate
                                                         187,000            
          current ratio
                                                         4,900            
          sales to receivables
                                                         3,900            
          total debt to equity
                                                         410            
          contractual obligations
                                                                     
          long-term debt obligations
                                                         16,400,000,000            
          land lease
                                                         22,752,000,000            
          operating lease obligations
                                                         68,000,000            
          other long-term obligations
                                                         987,000,000            
          gross profit as a % of net sales
                                                         30,400            
          selling, general and administrative
                                                         17,928,000            
          selling, general and administrative as a % of net sales
                                                         25,100            
          interest expense
                                                         574,000            
          other income
                                                         14,000            
          benefit from income taxes
                                                         187,000            
          surrender of shares for common stock options exercised
                                                          1,210,000 47,000         
          see accompanying notes to consolidated financial statements.
                                                                     
          impairment of goodwill