7Baggers

Intrepid Potash, Inc
(NYSE:IPI) 

IPI stock logo

Intrepid Potash, Inc. produces and sells potash and langbeinite products in the United States and internationally. It operates through three segments: Potash, Trio, and Oilfield Solutions. The Potash segment offers muriate of potash or potassium chloride for use as a fertilizer input in the agricult...

Founded: 2000
Full Time Employees: 445
CEO: Robert P.  
Sector: Basic Materials
Industry: Agricultural Inputs
Materials
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Quarterly
Annual
    Unit: USD2025-12-31 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 2009-06-30 2008-09-30 2008-06-30 2008-03-31 
                                                                 
      sales
    		75,877,000 53,219,000 71,472,000 97,760,000 55,803,000 57,549,000 62,055,000 79,287,000 56,663,000 54,465,000 81,035,000 86,920,000 66,677,000 74,752,000 91,740,000 104,399,000 71,828,000 59,153,000 67,888,000 71,463,000 48,442,000 38,078,000 46,450,000 63,984,000 48,849,000 51,160,000 62,512,000 57,554,000 67,534,000 36,528,000 51,014,000 53,195,000 33,305,000 32,060,000 43,910,000 48,332,000 42,188,000 43,643,000 51,840,000 73,277,000 42,819,000 53,692,000 73,651,000 117,021,000 98,285,000 102,280,000 110,949,000 98,875,000 73,806,000 70,569,000 92,680,000 99,257,000 110,939,000 129,350,000 98,784,000 112,243,000  73,392,000 146,257,000 80,162,000  
      less:
    		                                                             
      freight costs
    		13,196,000 6,579,000 11,011,000 17,491,000 8,490,000 8,022,000 9,423,000 12,830,000 7,620,000 7,909,000 10,516,000 11,590,000 6,880,000 7,793,000 9,227,000 10,237,000 7,788,000 7,911,000 10,115,000 12,078,000 8,738,000 7,802,000 8,735,000 11,860,000 9,583,000 8,724,000 11,293,000 10,456,000 12,190,000 6,196,000 8,931,000 9,734,000 6,172,000 6,160,000 7,985,000 8,721,000 8,806,000 8,187,000 8,931,000 10,332,000 5,565,000 5,348,000 6,898,000 10,912,000 10,607,000 10,925,000 11,760,000 9,932,000 8,281,000 5,952,000 6,526,000 8,097,000 7,880,000 9,699,000 4,823,000 6,762,000  4,122,000 5,054,000 3,537,000  
      warehousing and handling costs
    		3,002,000 2,609,000 3,114,000 3,490,000 2,742,000 3,058,000 2,586,000 3,089,000 2,567,000 2,731,000 2,801,000 2,733,000 2,526,000 2,541,000 2,204,000 2,476,000 2,206,000 2,066,000 2,378,000 2,632,000 2,147,000 2,315,000 2,065,000 2,904,000 1,993,000 2,162,000 2,230,000 2,236,000 2,214,000 2,192,000 2,600,000 2,276,000 2,657,000 2,046,000 2,197,000 2,770,000 3,188,000 2,616,000 2,538,000 2,664,000 3,556,000 3,199,000 3,437,000 3,747,000 3,992,000 3,270,000 2,988,000 2,812,000 3,500,000 2,854,000 3,094,000 3,579,000 4,363,000 4,234,000 3,005,000 3,364,000  2,098,000 1,976,000 1,240,000  
      cost of goods sold
    		42,044,000 33,051,000 42,641,000 60,842,000 35,648,000 38,266,000 41,070,000 56,431,000 38,776,000 39,921,000 52,336,000 56,245,000 31,620,000 37,648,000 38,498,000 44,510,000 37,606,000 34,974,000 41,196,000 47,645,000 31,743,000 27,045,000 34,008,000 43,047,000 26,735,000 31,863,000 35,818,000 31,694,000 37,375,000 19,180,000 32,121,000 33,280,000 20,814,000 19,395,000 29,714,000 35,873,000 33,953,000 35,272,000 41,850,000 59,777,000 36,953,000 42,151,000 55,435,000 83,282,000 68,164,000 77,794,000 79,383,000 78,573,000 57,308,000 46,780,000 55,003,000 53,773,000 61,453,000 63,382,000 51,064,000 60,581,000  31,775,000 49,133,000 27,951,000  
      lower of cost or net realizable value inventory adjustments
    		2,282,000 406,000 419,000 1,335,000 1,631,000 471,000 1,352,000 503,000 3,079,000 3,413,000            1,224,000 2,241,000 550,000 348,000 1,462,000                                    
      gross margin
    		15,353,000 10,574,000 14,287,000 14,602,000 7,292,000 7,732,000 7,624,000 6,434,000 4,621,000 491,000 15,382,000 16,352,000 25,651,000 26,770,000 41,811,000 47,176,000 21,849,000 10,608,000 14,199,000 9,108,000    5,623,000 10,190,000 6,949,000 13,171,000 13,168,000 14,825,000 8,960,000 7,286,000 7,200,000 1,146,000 3,792,000 3,697,000        2,605,000 18,720,000 15,446,000 6,888,000 15,678,000 3,992,000 3,159,000 12,903,000 28,053,000 33,800,000 37,183,000 51,854,000 39,895,000 41,206,000  35,397,000 90,094,000 47,434,000  
      yoy
    		110.55% 36.76% 87.40% 126.95% 57.80% 1474.75% -50.44% -60.65% -81.99% -98.17% -63.21% -65.34% 17.40% 152.36% 194.46% 417.96%    61.98%    -57.30% -31.26% -22.44% 80.77% 82.89% 1193.63% 136.29% 97.08%            -83.38% 368.94% 388.95% -46.62% -44.11% -88.19% -91.50% -75.12% -29.68% -17.97%  46.49% -55.72% -13.13%      
      qoq
    		45.20% -25.99% -2.16% 100.25% -5.69% 1.42% 18.50% 39.23% 841.14% -96.81% -5.93% -36.25% -4.18% -35.97% -11.37% 115.92% 105.97% -25.29% 55.90%     -44.82% 46.64% -47.24% 0.02% -11.18% 65.46% 22.98% 1.19% 528.27% -69.78% 2.57%         -86.08% 21.20% 124.25% -56.07% 292.74% 26.37% -75.52% -54.00% -17.00% -9.10% -28.29% 29.98% -3.18%   -60.71% 89.94% NaN%  
      selling and administrative
    		9,577,000 9,000,000 8,973,000 9,155,000 7,518,000 9,154,000 7,937,000 8,357,000 7,932,000 7,685,000 7,948,000 8,858,000 9,241,000 8,551,000 7,218,000 6,789,000 5,705,000 5,890,000 6,612,000 5,791,000 5,454,000 6,750,000 6,673,000 6,599,000 5,846,000 5,548,000 6,355,000 5,807,000 5,157,000 5,121,000 6,190,000 3,970,000 5,510,000 4,782,000 4,764,000 4,404,000 4,197,000 4,731,000 4,536,000 6,570,000 5,651,000 5,943,000 8,424,000 7,468,000 6,947,000 6,466,000 7,064,000 6,746,000 7,716,000 7,921,000 8,639,000 9,492,000 8,744,000 8,039,000 8,710,000 8,257,000  7,763,000 9,394,000 5,313,000 11,000 
      accretion of asset retirement obligation
    		631,000 657,000 658,000 657,000 622,000 623,000 622,000 622,000 535,000 535,000 535,000 535,000 490,000 491,000 490,000 490,000 535,000 441,000 441,000 441,000 435,000 434,000 434,000 435,000 446,000 513,000 417,000 417,000 417,000 417,000 417,000 417,000 390,000 390,000 389,000 389,000 442,000 442,000 442,000 442,000 424,000 424,000 424,000 424,000 406,000 405,000 406,000 406,000 375,000 375,000 374,000 375,000 181,000 181,000 181,000 181,000  173,000 185,000 115,000  
      impairment of long-lived assets
    		  1,204,000 662,000 7,626,000 874,000 831,000 1,377,000 42,767,000 521,000                                                    
      loss on sale of assets
    		-923,750 -2,239,000 -1,274,000 -182,000 156,500 134,000 241,000 251,000 63,000 59,000 -7,000 200,000 294,000 10,000 1,066,000 100,000 -640,000 5,000 -2,567,000 2,000 191,000 21,000                                        
      other operating income
    		-1,160,000 -1,145,000 -1,222,000 -1,284,000 -1,186,000 -1,370,000 -1,266,000 -1,132,000         -96,250 192,000                     -1,801,000  -567,250 -23,000 -2,312,000                   
      other operating expense
    		4,743,000 970,000 2,654,000 596,000 3,087,000 540,000 887,000 1,265,000 277,000 857,000 -362,000 1,385,000 3,499,000 264,000 1,242,000 -267,000   -583,000 6,000 240,000 237,000 269,000 -11,000 862,000 70,000 -83,000 371,000 206,000 -934,000 703,000 168,000 -2,158,000 -1,501,000 -457,000 1,650,000 145,000 94,000  -104,000    66,000 -1,200,000 2,000  -2,947,000              
      operating income
    		-958,000 3,331,000 3,294,000 4,998,000 -11,701,000 -2,223,000 -1,628,000 -4,306,000 -47,445,000 -9,166,000 7,268,000 5,374,000 6,127,000 17,454,000 31,795,000 40,064,000 15,028,000 4,080,000 10,296,000 2,868,000 -506,000 -7,750,000 -8,209,000 -6,779,000 2,904,000 615,000 6,417,000 6,424,000 8,881,000 4,237,000 -142,000 2,517,000 -2,879,000 -172,000 -1,684,000 -9,991,000 -16,153,000 -14,610,000 -10,557,000 -16,461,000 -361,934,000 -14,687,000 -3,931,000 10,762,000 9,293,000 15,000 8,513,000 -2,040,000 -4,986,000 1,686,000 20,380,000 23,762,000 28,135,000 43,551,000 30,919,000 32,796,000  26,872,000 79,505,000 42,006,000 -11,000 
      yoy
    		-91.81% -249.84% -302.33% -216.07% -75.34% -75.75% -122.40% -180.13% -874.36% -152.52% -77.14% -86.59% -59.23% 327.79% 208.81% 1296.93% -3069.96% -152.65% -225.42% -142.31% -117.42% -1360.16% -227.93% -205.53% -67.30% -85.49% -4619.01% 155.22% -408.48% -2563.37% -91.57% -125.19% -82.18% -98.82% -84.05% -39.31% -95.54% -0.52% 168.56% -252.95% -3994.69% -98013.33% -146.18% -627.55% -286.38% -99.11% -58.23% -108.59% -117.72% -96.13% -34.09% -27.55%  62.07% -61.11% -21.93%      
      qoq
    		-128.76% 1.12% -34.09% -142.71% 426.36% 36.55% -62.19% -90.92% 417.62% -226.11% 35.24% -12.29% -64.90% -45.10% -20.64% 166.60% 268.33% -60.37% 259.00% -666.80% -93.47% -5.59% 21.09% -333.44% 372.20% -90.42% -0.11% -27.67% 109.61% -3083.80% -105.64% -187.43% 1573.84% -89.79% -83.14% -38.15% 10.56% 38.39% -35.87% -95.45% 2364.32% 273.62% -136.53% 15.81% 61853.33% -99.82% -517.30% -59.09% -395.73% -91.73% -14.23% -15.54% -35.40% 40.86% -5.72%   -66.20% 89.27% -381972.73%  
      other income
    		34,000 24,000 -354,000 -466,000 -159,000 136,000 60,000 8,000 20,000 19,000 43,000 13,000 24,000 -258,000 11,000 530,000 6,000 25,000 8,000 9,000 371,000 25,000 -28,000 16,000 12,000 9,000  334,000 39,000 23,000 62,000 20,000 -117,000 128,000 -27,000 736,000 703,000 218,000 59,000 142,000 135,000 67,000 46,000 327,000 274,000 343,000 225,000 234,000 54,000 2,921,000 -1,340,000 171,000 123,000 83,000 85,000 -28,000  323,000 -108,000 -485,000  
      equity in earnings of unconsolidated entities
    		-79,500 -86,000 -232,000    -116,000 149,000 -194,000 -54,000 -1,059,000 821,000 -77,000 766,000                                                
      interest expense
    		-25,000 -36,000 -66,000 -105,000         -16,000 -28,000 -24,000 -33,000 -42,000 -82,000 -918,000 -426,000 -412,000 -2,450,000 -635,000 -792,000 -773,000 -849,000 -806,000 -603,000 -1,235,000 -864,000 -878,000 -878,000 -1,061,000 -1,994,000 -4,217,000 -4,421,000 -2,488,000 -3,905,000 -3,000,000 -2,229,000 -1,531,000 -1,574,000 -1,602,000 -1,644,000 -1,663,000 -1,632,000 -1,556,000 -1,380,000              
      interest income
    		630,000 776,000 651,000 375,000 385,000 536,000 547,000 244,000 49,000 88,000 76,000 85,000 82,000 77,000 15,000      29,000   116,000     11,000   98,000 1,000   3,000 5,000 57,000 101,000 123,000 176,000 232,000 200,000 155,000 76,000 35,000 22,000 53,000 144,000 165,000 163,000 52,000 317,000 487,000 526,000 513,000  15,000 440,000 280,000  
      income income before income taxes
    		3,026,000 4,009,000 3,293,000 4,802,000                                                          
      income tax benefit
    		-54,000 -264,000 -30,000 -196,000 -195,419,000 7,000 304,000 775,000 10,282,000 1,917,000           10,500   42,000 -61,000 8,000   -62,000 -46,000   2,666,000 130,000   1,366,000 -1,000 -1,000  1,282,750 7,852,000 350,000 -3,071,000 284,750 3,000 -1,642,000 2,778,000 -3,879,750 350,000        -13,023,000 -29,474,000   
      net income
    		-429,000 3,745,000 3,263,000 4,606,000 -207,049,000 -1,833,000 -833,000 -3,130,000 -37,288,000 -7,196,000 4,305,000 4,506,000 3,982,000 13,108,000 23,708,000 31,422,000 223,861,000 4,023,000 19,499,000 2,451,000 -710,000 -10,175,000 -8,872,000 -7,397,000 2,082,000 -217,000 5,611,000 6,155,000 7,634,000 3,350,000 -958,000 1,757,000 -1,390,000 -1,908,000 -5,935,000 -13,678,000 -16,567,000 -18,241,000 -13,398,000 -18,427,000 -518,258,000 -8,110,000 -4,937,000 6,529,000 5,791,000 -1,236,000 5,562,000 -355,000 -5,987,000 2,026,000 11,317,000 14,919,000 14,537,000 33,267,000 19,013,000 20,626,000  14,436,000 49,719,000 25,764,000 -7,000 
      yoy
    		-99.79% -304.31% -491.72% -247.16% 455.27% -74.53% -119.35% -169.46% -1036.41% -154.90% -81.84% -85.66% -98.22% 225.83% 21.59% 1182.01% -31629.72% -139.54% -319.78% -133.14% -134.10% 4588.94% -258.12% -220.18% -72.73% -106.48% -685.70% 250.31% -649.21% -275.58% -83.86% -112.85% -91.61% -89.54% -55.70% -25.77% -96.80% 124.92% 171.38% -382.23% -9049.37% 556.15% -188.76% -1939.15% -196.73% -161.01% -50.85% -102.38% -141.18% -93.91% -40.48% -27.67%  130.44% -61.76% -19.94%      
      qoq
    		-111.46% 14.77% -29.16% -102.22% 11195.64% 120.05% -73.39% -91.61% 418.18% -267.15% -4.46% 13.16% -69.62% -44.71% -24.55% -85.96% 5464.53% -79.37% 695.55% -445.21% -93.02% 14.69% 19.94% -455.28% -1059.45% -103.87% -8.84% -19.37% 127.88% -449.69% -154.52% -226.40% -27.15% -67.85% -56.61% -17.44% -9.18% 36.15% -27.29% -96.44% 6290.36% 64.27% -175.62% 12.74% -568.53% -122.22% -1666.76% -94.07% -395.51% -82.10% -24.14% 2.63% -56.30% 74.97% -7.82%   -70.96% 92.98% -368157.14%  
      weighted-average shares outstanding:
    		                                                             
      basic
    		13,014,205,000 13,031,000 12,985,000 12,917,000 12,880,026,000 12,908,000 12,886,000 12,817,000 12,760,937,000 12,789,000 12,766,000 12,694,000 13,151,752,000 13,256,000 13,246,000 13,160,000 13,098,871,000 13,123,000 13,089,000 13,054,000 12,993,225,000 13,006,000 129,786,000 129,572,000 129,049,168,000 129,170,000 128,896,000 128,730,000 128,070,702,000 128,233,000 127,861,112,000 127,661,458,000   126,221,142,000 81,992,071,000 75,818,735,000 75,871,774,000 75,838,782,000 75,756,535,000 75,669,489,000 75,701,490,000 75,683,075,000 75,589,092,000 75,504,677,000 75,528,235,000 75,514,991,000 75,444,953,000 75,378,655,000 75,394,377,000 75,383,108,000 75,340,559,000 75,276,609,000 75,298,838,000 75,279,074,000 75,227,387,000 75,180,714,000  74,843,124,000 74,843,124,000 1,000,000 
      diluted
    		13,174,001,000 13,190,000 13,174,000 13,088,000 12,880,026,000 12,908,000 12,886,000 12,817,000 12,760,937,000 12,789,000 12,855,000 12,875,000 13,452,233,000 13,489,000 13,620,000 13,595,000 13,391,362,000 13,367,000 13,338,000 13,297,000 12,993,225,000 13,006,000 129,786,000 129,572,000 131,050,920,000 129,170,000 131,043,000 130,880,000 130,985,919,000 130,894,000 127,861,112,000 130,764,998   126,221,142,000 81,992,071,000 75,818,735,000 75,871,774,000 75,838,782,000 75,756,535,000 75,669,489,000 75,701,490,000 75,683,075,000 75,707,079,000 75,630,323,000 75,528,235,000 75,573,918,000 75,444,953,000 75,406,727,000 75,404,138,000 75,399,566,000 75,392,527,000 75,336,982,000 75,350,216,000 75,308,472,000 75,317,073,000 75,281,050,000  75,002,839,000 74,977,793,000 1,000,000 
      income per share:
    		                                                             
      basic
    		0.223 0.29 0.25 0.36                                                          
      diluted
    		0.22 0.28 0.25 0.35                                                          
      equity in loss of unconsolidated entities
    		    -64,000 -289,000                                                        
      income before income taxes
    		    -11,630,000 -1,840,000 -1,137,000 -3,905,000 -47,570,000 -9,113,000 6,328,000 6,293,000 6,140,000 18,011,000 31,797,000 40,561,000 14,992,000 4,023,000 19,499,000 2,451,000 -663,000 -10,175,000 -8,872,000 -7,439,000 2,143,000 -225,000 5,611,000 6,155,000 7,696,000 3,396,000 -958,000 1,757,000 -4,056,000 -2,038,000 -5,928,000 -13,673,000 -17,933,000 -18,240,000 -13,397,000 -18,425,000 -363,154,000 -15,962,000 -5,287,000 9,600,000 7,980,000 -1,239,000 7,204,000 -3,133,000 -5,688,000 1,676,000 18,488,000 23,617,000 28,411,000 43,952,000 31,325,000 33,239,000  27,459,000 79,193,000 41,955,000 -11,000 
      earnings per share:
    		                                                             
      basic
    		    -0.113 -0.14 -0.06 -0.24 0.033 -0.56 0.34 0.35 1.29 0.99 1.79 2.39 0.495 0.31 1.49 0.19 -0.51 -0.78 -0.07 -0.06 0.023  0.04 0.05 0.008 0.03 -0.01 0.01       -0.18 -0.24 -6.85 -0.11 -0.07 0.09 0.08 -0.02 0.07  -0.07 0.03 0.15 0.2 0.19 0.44 0.25 0.27  0.19 0.66 0.34  
      diluted
    		    -0.113 -0.14 -0.06 -0.24 0.033 -0.56 0.33 0.35 1.258 0.97 1.74 2.31 0.488 0.3 1.46 0.18 -0.51 -0.78 -0.07 -0.06 0.023  0.04 0.05 0.008 0.03 -0.01 0.01       -0.18 -0.24 -6.85 -0.11 -0.07 0.09 0.08 -0.02 0.07  -0.07 0.03 0.15 0.2 0.19 0.44 0.25 0.27  0.19 0.66 0.34  
      income tax expense
    		          -2,023,000 -1,787,000 -5,532,750 -4,903,000 -8,089,000 -9,139,000                   -7,000 -5,000    -2,000           -7,171,000 -8,698,000 -13,874,000 -10,685,000 -12,312,000 -12,613,000      
      costs associated with abnormal production
    		                2,379,000 3,594,000                                            
      gain on extinguishment of debt
    		                  10,113,000                                           
      litigation settlement
    		                       10,075,000                                      
      gross (deficit) margin
    		                    1,179,000 -308,000 -599,000              -7,004,000 -7,624,000 -5,466,000 -9,153,000 -28,459,000 -8,343,000                    
      loss on sale of asset
    		                      234,000 -4,696,000                                      
      care and maintenance expense
    		                        132,000 203,000 65,000 149,000 164,000 119,000 118,000 128,000 283,000 293,000 419,000 692,000 884,000 1,719,000                        
      lower-of-cost-or-market inventory adjustments
    		                            195,250  76,000 705,000 2,516,000 667,000 317,000 3,824,000 3,245,000 5,192,000 2,930,000 9,007,000 21,709,000 4,427,000 5,276,000 360,000 76,000 3,403,000 1,140,000 3,566,000              
      restructuring expense
    		                                  266,000  409,000  1,914,000 400,000        1,827,000              
      weighted-average shares outstanding:
    		                                                             
      basic and diluted
    		                                115,708,859,000 126,601,580,000                            
      loss per share:
    		                                                             
      basic and diluted
    		                                -0.01 -0.02                            
      loss per share:
    		                                                             
      basic
    		                                  -0.05 -0.17 -0.165 -0.24                       -6.56 
      diluted
    		                                  -0.05 -0.17 -0.165 -0.24                       -6.56 
      gross deficit
    		                                   -2,856,000                          
      costs associated with abnormal production and other
    		                                      1,057,000 650,000 3,495,000 6,910,000                    
      other operating
    		                                              -305,000               
      lower of cost or market inventory adjustments
    		                                                1,558,000 2,080,000            
      interest expense, including realized and
    		                                                             
      unrealized derivative gains and losses
    		                                                -851,000 -248,000 -219,000 -213,000      251,000    
      other
    		                                                  4,000 8,000 60,000 181,000 -3,000 330,000  589,000    
      insurance settlement income from property and business losses
    		                                                             
      interest expense, including realized and unrealized derivative
    		                                                             
      gains and losses
    		                                                    -172,250 -221,000 -215,000 -253,000      
      insurance settlements in excess of
    		                                                             
      property losses
    		                                                         -2,000    
      weighted average shares outstanding:
    		                                                             
      basic
    		                                                         75,017,097,000    
      diluted
    		                                                         75,030,347,000    
      exploration and other
    		                                                          1,010,000   
      interest expense, including realized and unrealized derivative gains and losses
    		                                                          -643,000 186,000  
      insurance settlements in excess of property losses
    		                                                          -1,000 -32,000  
      income taxes benefit
    		                                                           -16,191,000  
      less: freight costs
    		                                                             
      income taxes
    		                                                            4,000 
    Balance Sheets:
    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 2009-06-30 
                                                               
        assets
      		                                                         
        cash and cash equivalents
      		77,207,000 85,049,000 45,668,000 41,309,000 38,034,000 51,663,000 34,067,000 4,071,000 2,791,000 17,158,000 10,451,000 18,514,000 49,209,000 81,927,000 60,139,000 36,452,000 25,637,000 53,250,000 35,995,000 19,515,000 9,258,000 34,552,000 44,371,000 20,603,000 13,023,000 15,508,000 34,032,000 33,222,000 37,214,000 26,234,000 6,085,000 1,068,000 1,694,000 6,190,000 20,770,000 4,464,000 22,979,000 30,984,000 24,422,000 9,307,000 24,322,000 40,285,000 66,786,000 67,589,000 70,833,000 31,069,000 3,234,000 394,000 10,446,000 47,797,000 5,111,000 33,619,000 55,115,000 66,843,000 60,107,000 73,372,000 118,673,000 
        short-term investments
      		  496,000 989,000 1,979,000 2,464,000 2,971,000 2,970,000 3,463,000 3,462,000 4,960,000 5,959,000 4,970,000 5,980,000                       4,908,000 16,599,000 30,014,000 50,523,000 56,590,000 63,221,000 34,310,000 10,434,000 3,019,000 4,013,000 6,586,000 15,214,000 40,655,000 37,419,000 2,501,000 24,128,000 74,638,000 97,923,000 103,081,000 97,242,000 751,000 
        accounts receivable:
      		                                                         
        trade
      		25,024,000 20,749,000 47,847,000 22,465,000 32,223,000 21,617,000 41,826,000 22,077,000 24,091,000 23,819,000 39,211,000 26,737,000 38,229,000 32,639,000 51,608,000 35,409,000 32,731,000 23,029,000 36,898,000 22,516,000 23,271,000 19,256,000 31,862,000 23,749,000 31,136,000 24,553,000 28,217,000 25,161,000 18,289,000 21,208,000 29,605,000 15,076,000 17,866,000 11,476,000 19,119,000 10,343,000 17,129,000 8,986,000 24,432,000 9,743,000 21,357,000 15,642,000 38,516,000 28,561,000 32,558,000 33,036,000 30,268,000 20,837,000 25,394,000 35,822,000 44,224,000 31,508,000 47,796,000 31,948,000 43,691,000 29,304,000 18,934,000 
        other receivables
      		3,184,000 2,234,000 2,431,000 763,000 2,659,000 1,679,000 1,201,000 1,374,000 2,357,000 1,690,000 854,000 790,000 2,124,000 1,635,000 1,372,000 989,000 3,449,000 2,470,000 2,298,000 1,856,000 2,575,000 1,982,000 1,554,000 1,247,000 1,976,000 1,729,000 959,000 597,000 3,801,000 2,095,000 969,000 762,000 853,000 1,383,000 892,000 492,000 2,787,000 2,352,000 1,660,000 1,470,000 3,214,000 7,271,000 3,280,000 3,600,000 5,662,000 5,103,000 10,773,000 7,457,000 8,368,000 10,616,000 9,468,000 9,122,000 9,658,000 9,091,000 7,916,000 6,898,000 650,000 
        inventory
      		110,860,000 100,196,000 98,109,000 112,968,000 109,578,000 101,932,000 102,549,000 114,252,000 108,360,000 103,966,000 107,174,000 114,816,000 96,913,000 82,644,000 79,297,000 78,856,000 76,828,000 74,760,000 78,919,000 88,673,000 85,204,000 81,041,000 87,860,000 94,220,000 85,363,000 82,200,000 86,270,000 82,046,000 77,394,000 68,354,000 75,916,000 83,126,000 83,802,000 79,095,000 86,194,000 94,355,000 101,898,000 109,570,000 103,616,000 106,531,000 106,578,000 86,847,000 74,446,000 84,094,000 78,676,000 86,672,000 93,065,000 105,011,000 88,544,000 70,775,000 61,204,000 53,275,000 56,466,000 58,963,000 51,364,000 55,390,000 63,223,000 
        prepaid expenses and other current assets
      		5,259,000 3,404,000 4,370,000  5,783,000 3,832,000 5,530,000  5,546,000 3,741,000 4,432,000  6,558,000 4,379,000 5,278,000  4,539,000 2,854,000 2,906,000  5,844,000 4,100,000 4,669,000  5,273,000 3,294,000 7,480,000  5,443,000 4,662,000 5,175,000  7,323,000 7,591,000 8,317,000  6,262,000 3,070,000 10,940,000  5,940,000 3,723,000 4,087,000 4,739,000 5,456,000 3,700,000 4,549,000 5,653,000 6,776,000 3,935,000 4,679,000 5,393,000 6,696,000 3,088,000 3,916,000 5,015,000 2,042,000 
        total current assets
      		221,534,000 211,632,000 198,921,000 183,763,000 190,256,000 183,187,000 188,144,000 151,944,000 146,608,000 153,836,000 167,082,000 171,679,000 198,003,000 209,225,000 197,694,000 156,850,000 143,184,000 156,363,000 157,016,000 135,788,000 126,152,000 140,931,000 170,316,000 145,343,000 136,771,000 127,284,000 156,958,000 145,358,000 142,141,000 122,553,000 117,750,000 111,946,000 111,538,000 107,111,000 136,676,000 123,743,000 155,963,000 171,561,000 195,084,000 195,799,000 220,225,000 222,907,000 221,777,000 202,487,000 201,959,000 183,852,000 169,159,000 178,629,000 188,491,000 213,883,000 134,390,000 162,356,000 254,576,000 272,933,000 276,909,000 276,645,000 211,893,000 
        property, plant, equipment, and mineral properties
      		334,150,000 336,255,000 341,256,000 344,338,000 354,898,000 354,294,000 354,809,000 358,249,000 402,862,000 400,627,000 387,851,000 375,630,000 358,729,000 347,834,000 338,750,000 341,117,000 339,986,000 341,984,000 348,945,000 355,497,000 362,117,000 368,008,000 372,057,000 378,509,000 381,768,000 388,157,000 347,670,000 346,209,000 350,211,000 353,920,000 359,362,000 364,542,000 363,287,000 367,550,000 374,293,000 388,490,000 399,144,000 404,690,000 409,808,000 419,476,000 758,059,000 764,850,000 770,188,000 785,250,000 799,095,000 812,172,000 823,508,000           
        water rights
      		19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000 19,184,000                                  
        long-term parts inventory
      		30,423,000 29,150,000 28,514,000 33,775,000 32,385,000 30,899,000 30,543,000 30,231,000 25,347,000 24,911,000 24,820,000 24,823,000 25,398,000 26,622,000 27,963,000 29,251,000 29,067,000 29,044,000 29,359,000 28,900,000 28,978,000 28,603,000 28,403,000 27,569,000 28,476,000 29,783,000 29,895,000 30,031,000 29,915,000 31,858,000 31,106,000 30,611,000 28,890,000 27,173,000 23,731,000 21,037,000 20,535,000 18,389,000 18,467,000 17,344,000 18,204,000 18,879,000 17,700,000 16,366,000 15,248,000 13,592,000 14,106,000 12,469,000 12,220,000 11,306,000 11,060,000 10,208,000 7,493,000 7,393,000 9,338,000 9,559,000 4,237,000 
        long-term investments
      		236,000 322,000 3,097,000 3,571,000 4,699,000 5,090,000 6,297,000 6,627,000 7,930,000 8,614,000 10,824,000 9,841,000 11,696,000                          479,000 3,799,000 13,028,000 20,851,000 11,546,000 11,856,000 1,000 2,000 2,000 9,505,000 29,804,000 44,205,000   16,146,000 21,143,000 11,525,000 6,180,000  
        other assets
      		11,010,000 10,617,000 10,304,000 9,889,000 9,395,000 9,000,000 8,609,000 8,016,000 6,864,000 7,018,000 7,138,000 7,294,000 7,377,000 16,025,000 12,149,000 11,418,000 10,403,000 10,545,000 10,676,000 10,819,000 10,960,000 11,102,000 7,726,000 7,834,000 7,920,000 6,533,000 3,594,000 3,633,000 3,502,000 3,653,000 3,804,000 3,955,000 4,110,000 4,244,000 4,381,000 7,631,000 5,885,000 4,558,000 3,532,000 4,066,000 4,015,000 3,788,000 3,922,000 4,035,000 4,134,000 4,132,000 4,231,000 4,252,000 4,339,000 4,106,000 4,155,000 4,246,000 4,338,000 3,763,000 3,856,000 3,949,000 8,060,000 
        total assets
      		616,537,000 607,160,000 601,276,000 594,520,000 806,219,000 796,991,000 802,598,000 768,474,000 792,791,000 796,266,000 800,990,000 794,203,000 807,914,000 811,024,000 795,815,000 766,895,000 541,824,000 557,120,000 565,180,000 550,188,000 547,391,000 567,828,000 597,686,000 578,439,000 574,119,000 567,649,000 538,117,000 525,231,000 525,769,000 511,984,000 512,022,000 511,054,000 507,825,000 506,078,000 539,081,000 540,901,000 581,527,000 599,198,000 627,370,000 640,484,000 1,166,729,000 1,172,987,000 1,171,971,000 1,166,719,000 1,167,424,000 1,160,437,000 1,158,980,000 1,175,273,000 1,181,224,000 1,176,256,000 1,007,305,000 994,623,000 1,024,853,000 992,770,000 948,433,000 932,870,000 744,820,000 
        liabilities and stockholders' equity
      		                                                         
        accounts payable
      		9,241,000 7,778,000 8,824,000 8,616,000 8,917,000 7,173,000 11,029,000 12,848,000 8,756,000 12,117,000 14,858,000 18,645,000 14,114,000 9,869,000 8,904,000 9,068,000 9,593,000 7,206,000 13,648,000 7,278,000 8,037,000 8,228,000 12,377,000                                   
        accrued liabilities
      		12,516,000 11,388,000 11,205,000 9,483,000 14,733,000 11,310,000 13,374,000 19,061,000 14,523,000 14,388,000 14,368,000 16,212,000 22,996,000 12,775,000 21,534,000 22,938,000 22,202,000 15,015,000 13,080,000 12,701,000 12,817,000 12,184,000 27,461,000 13,740,000 15,077,000 10,507,000 8,535,000 8,717,000 10,183,000 6,686,000 8,618,000 8,074,000 12,070,000 7,220,000 10,742,000 8,690,000 15,253,000 10,115,000 17,178,000 15,429,000 15,962,000 15,946,000 15,628,000 12,483,000 20,037,000 18,238,000 21,521,000 29,845,000 35,821,000 37,311,000 29,488,000 32,496,000 27,466,000 27,445,000 16,012,000 14,795,000 11,751,000 
        accrued employee compensation and benefits
      		10,398,000 7,976,000 7,595,000 9,842,000 11,810,000 6,856,000 6,299,000 7,254,000 8,047,000 5,921,000 6,181,000 6,975,000 8,157,000 6,038,000 6,823,000 6,805,000 8,466,000 8,664,000 5,928,000 4,422,000 5,806,000 6,353,000 3,994,000 4,464,000 3,744,000 5,973,000 4,204,000 4,124,000 5,543,000 5,227,000 3,579,000 4,317,000 3,140,000 3,924,000 2,762,000 4,225,000 4,110,000 7,895,000 5,246,000 7,409,000 10,373,000 9,329,000 10,187,000 12,069,000 13,680,000 10,427,000 9,557,000 9,122,000 8,950,000 8,416,000 11,032,000 11,680,000 12,552,000 10,237,000 10,081,000 12,370,000 6,621,000 
        other current liabilities
      		10,087,000 12,941,000 10,873,000 10,062,000 7,730,000 8,100,000 8,748,000 7,265,000 6,871,000 5,798,000 8,843,000 7,036,000 3,847,000 34,330,000 34,374,000 34,571,000 34,830,000 34,812,000 36,264,000 32,816,000 27,779,000 24,044,000 19,393,000 19,382,000 16,022,000 15,010,000 10,725,000 11,891,000 10,239,000 8,130,000 3,746,000 64,000 83,000 107,000 145,000 964,000 943,000 1,321,000 697,000 547,000 4,558,000 4,832,000 2,063,000 2,075,000 1,171,000 1,206,000 1,234,000 2,059,000 1,810,000 2,202,000 1,646,000 3,578,000 2,058,000 596,000 1,287,000 1,476,000 1,938,000 
        total current liabilities
      		42,242,000 40,083,000 38,497,000 38,003,000 43,190,000 33,439,000 39,450,000 46,468,000 38,197,000 38,224,000 44,250,000 48,876,000 49,114,000 63,012,000 71,803,000 73,423,000 75,091,000 65,697,000 78,920,000 67,217,000 64,439,000 75,730,000 83,275,000 87,445,000 84,648,000 78,774,000 36,423,000 34,781,000 43,997,000 35,311,000 35,916,000 37,486,000 23,676,000 23,152,000 22,658,000 24,120,000 46,337,000 31,248,000 44,145,000 39,139,000 50,505,000 50,263,000 44,979,000 46,635,000 53,026,000 45,825,000 51,728,000 68,628,000 68,675,000 67,527,000 64,231,000 67,388,000 64,912,000 67,661,000 43,838,000 49,675,000 37,198,000 
        asset retirement obligation, net of current portion
      		34,326,000 33,669,000 33,011,000  31,944,000 31,321,000 30,699,000  28,169,000 27,634,000 27,099,000  27,204,000                                             
        operating lease liabilities
      		1,790,000 2,110,000 2,189,000 780,000 855,000 345,000 518,000 741,000 1,119,000 1,451,000 1,814,000 2,206,000 2,116,000 1,859,000 1,957,000 1,879,000 1,163,000 1,413,000 1,851,000 2,136,000 2,660,000 3,098,000 3,577,000 4,025,000 3,374,000 3,827,000 3,766,000                               
        finance lease liabilities
      		1,921,000 1,308,000 1,586,000 1,838,000 2,082,000 1,428,000 1,608,000 1,451,000 1,658,000 1,629,000 1,219,000                                               
        deferred other income, long-term
      		43,797,000 44,361,000 44,925,000 45,489,000 46,053,000 46,617,000 47,170,000                                                   
        other non-current liabilities
      		1,729,000 1,792,000 1,615,000 1,664,000 1,502,000 1,593,000 1,166,000 1,309,000 1,221,000 1,227,000 1,315,000 1,479,000 1,007,000 1,310,000 1,273,000 1,166,000 1,129,000 878,000 928,000 961,000 1,024,000 1,063,000 420,000 420,000 420,000 420,000 420,000 420,000    102,000 100,000 100,000     1,757,000 1,868,000 1,086,000 1,086,000 2,330,000 2,410,000 2,784,000 2,853,000 2,919,000 2,715,000 3,083,000 3,088,000 2,112,000 2,155,000 2,206,000 2,256,000 2,311,000 2,354,000 7,690,000 
        total liabilities
      		125,805,000 123,323,000 121,823,000 120,128,000 125,626,000 114,743,000 120,611,000 84,046,000 72,364,000 70,165,000 80,697,000 79,125,000 79,441,000 94,185,000 102,547,000 103,492,000 102,604,000 122,585,000 150,741,000 138,929,000 136,295,000 147,620,000 169,444,000 143,783,000 142,339,000 136,627,000 113,771,000 107,968,000 116,261,000 107,125,000 107,279,000 108,501,000 104,324,000 103,314,000 131,040,000 177,530,000 202,635,000 202,920,000 218,367,000 213,958,000 223,230,000 222,570,000 218,122,000 219,434,000 226,861,000 219,326,000 224,934,000 241,302,000 242,473,000 240,936,000 86,246,000 88,887,000 77,894,000 80,153,000 55,765,000 61,737,000 53,554,000 
        commitments and contingencies
      		                                                         
        common stock, 0.001 par value...
      		                                                         
        13,116,675 and 12,908,078 shares outstanding
      		                                                         
        at september 30, 2025, and december 31, 2024, respectively
      		14,000                                                         
        additional paid-in capital
      		673,171,000 670,021,000 668,900,000 668,445,000 667,597,000 667,419,000 666,326,000 665,637,000 664,348,000 662,826,000 661,323,000 660,614,000 658,860,000 657,453,000 657,590,000 659,147,000 658,825,000 658,163,000 657,566,000 656,837,000 655,964,000 654,784,000 653,946,000 652,963,000 652,170,000 651,195,000 650,130,000 649,202,000 649,082,000 647,783,000 646,709,000 645,813,000 645,372,000 642,728,000 642,071,000 583,653,000 582,607,000 581,755,000 581,101,000 580,227,000 578,928,000 577,751,000 576,211,000 576,186,000 575,225,000 574,536,000 573,033,000 572,616,000 571,449,000 570,244,000 568,707,000 568,375,000 567,088,000 566,053,000 565,155,000 564,285,000 554,747,000 
        accumulated deficit
      		-160,441,000 -164,186,000 -167,449,000              -219,618,000 -223,641,000 -243,140,000 -245,591,000 -244,881,000                                     
        less treasury stock, at cost
      		-22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -22,012,000 -2,881,000                                             
        total stockholders' equity
      		490,732,000 483,837,000 479,453,000 474,392,000 680,593,000 682,248,000 681,987,000 684,428,000 720,427,000 726,101,000 720,293,000 715,078,000 728,473,000 716,839,000 693,268,000 663,403,000 439,220,000 434,535,000 414,439,000 411,259,000 411,096,000 420,208,000 428,242,000 434,656,000 431,780,000 431,022,000 424,346,000 417,263,000 409,508,000 404,859,000 404,743,000 402,553,000 403,501,000 402,764,000 408,041,000 363,371,000 378,892,000 396,278,000 409,003,000 426,526,000 943,499,000 950,417,000 953,849,000 947,285,000 940,563,000 941,111,000 934,046,000 933,971,000 938,751,000 935,320,000 921,059,000 905,736,000 946,959,000 912,617,000 892,668,000 871,133,000 691,266,000 
        total liabilities and stockholders' equity
      		616,537,000 607,160,000 601,276,000 594,520,000 806,219,000 796,991,000 802,598,000 768,474,000 792,791,000 796,266,000 800,990,000 794,203,000 807,914,000 811,024,000 795,815,000 766,895,000 541,824,000 557,120,000 565,180,000 550,188,000 547,391,000 567,828,000 597,686,000 578,439,000 574,119,000 567,649,000 538,117,000 525,231,000 525,769,000 511,984,000 512,022,000 511,054,000 507,825,000 506,078,000 539,081,000 540,901,000 581,527,000 599,198,000 627,370,000 640,484,000 1,166,729,000 1,172,987,000 1,171,971,000 1,166,719,000 1,167,424,000 1,160,437,000 1,158,980,000 1,175,273,000 1,181,224,000 1,176,256,000 1,007,305,000 994,623,000 1,024,853,000 992,770,000 948,433,000 932,870,000 744,820,000 
        13,002,170 and 12,908,078 shares outstanding
      		                                                         
        at june 30, 2025, and december 31, 2024, respectively
      		 14,000                                                        
        12,961,175 and 12,908,078 shares outstanding
      		                                                         
        at march 31, 2025, and december 31, 2024, respectively
      		  14,000                                                       
        other current assets
      		   5,269,000    7,200,000    4,863,000    5,144,000    3,228,000    5,524,000    4,332,000    9,251,000    12,710,000    18,225,000                  
        non-current deferred tax asset
      		    195,402,000 195,337,000 195,012,000 194,223,000 183,996,000 182,076,000 184,091,000 185,752,000 187,527,000 192,134,000 200,075,000 209,075,000                         153,198,000 141,712,000 146,838,000 146,725,000 146,987,000 146,687,000 147,974,000 143,849,000 162,205,000 162,766,000 169,995,000 180,548,000 187,768,000 195,718,000 206,169,000 215,632,000 310,352,000 
        advances on credit facility
      		       4,000,000 2,000,000  5,000,000       29,817,000 29,817,000     19,817,000 19,817,000 20,000,000     1,500,000 3,900,000                          
        asset retirement obligation
      		   32,354,000    30,077,000    26,564,000  28,004,000 27,514,000 27,024,000 25,221,000 24,780,000 24,313,000 23,872,000 23,437,000 23,003,000 22,574,000 22,140,000 24,172,000 23,909,000 23,492,000 23,125,000 22,727,000 22,310,000 21,893,000 21,476,000 21,144,000 20,754,000 20,365,000 19,976,000 24,274,000 23,832,000 23,393,000 22,951,000 21,639,000 21,221,000 20,813,000 20,389,000 21,051,000 20,648,000 20,287,000 19,959,000 20,715,000 20,321,000 19,903,000 19,344,000 10,776,000 10,236,000 9,616,000 9,708,000 8,666,000 
        and 12,908,078 and 12,807,316 shares outstanding
      		                                                         
        at december 31, 2024 and 2023, respectively
      		   14,000                                                      
        (accumulated deficit) retained earnings
      		   -172,055,000                                                      
        12,908,078 and 12,807,316 shares outstanding
      		                                                         
        at september 30, 2024, and december 31, 2023, respectively
      		    14,000                                                     
        retained earnings
      		    34,994,000 36,827,000 37,660,000 40,790,000 78,078,000 85,274,000 80,969,000 76,463,000 72,481,000 59,373,000 35,665,000 4,243,000                         364,533,000 372,643,000 377,580,000 371,051,000 365,260,000 366,497,000 360,935,000 361,290,000 367,277,000 365,251,000 353,934,000 339,015,000 381,110,000 347,843,000 328,830,000 308,204,000 137,283,000 
        at june 30, 2024, and december 31, 2023, respectively
      		     14,000                                                    
        12,875,520 and 12,807,316 shares outstanding
      		                                                         
        at march 31, 2024, and december 31, 2023, respectively
      		      13,000                                                   
        income taxes payable
      		       40,000    8,000   168,000 41,000      49,000 50,000 50,000  816,000 914,000 914,000 210,000 172,000 180,000                           
        and 12,807,316 and 12,687,822 shares outstanding
      		                                                         
        at december 31, 2023 and 2022, respectively
      		       13,000                                                  
        12,789,326 and 12,687,822 shares outstanding
      		                                                         
        at september 30, 2023, and december 31, 2022, respectively
      		        13,000                                                 
        at june 30, 2023, and december 31, 2022, respectively
      		         13,000                                                
        12,759,990 and 12,687,822 shares outstanding
      		                                                         
        at march 31, 2023, and december 31, 2022, respectively
      		          13,000                                               
        and 12,687,822 and 13,149,315 shares outstanding
      		                                                         
        at december 31, 2022 and 2021, respectively
      		           13,000                                              
        13,195,080 and 13,149,315 shares outstanding
      		                                                         
        at september 30, 2022, and december 31, 2021, respectively
      		            13,000                                             
        refundable income taxes
      		             21,000                  2,663,000  1,376,000 1,384,000 1,379,000     199,000 288,000 72,000 114,000 527,000 14,734,000 13,697,000 15,722,000 4,505,000 3,381,000 3,303,000 3,306,000    4,493,000 6,887,000 
        13,265,813 and 13,149,315 shares outstanding
      		                                                         
        at june 30, 2022, and december 31, 2021, respectively
      		             13,000                                            
        13,218,875 and 13,149,315 shares outstanding
      		                                                         
        at march 31, 2022, and december 31, 2021, respectively
      		              13,000                                           
        current portion of long-term debt
      		                  10,000,000 10,000,000 10,000,000 24,872,000 20,000,000 20,000,000 20,000,000 20,000,000   10,000,000 10,000,000 10,000,000 10,000,000  6,000,000   14,677,000                     
        long-term debt
      		                  14,912,000 14,926,000 14,918,000 14,909,000 29,781,000 29,753,000 29,725,000 29,697,000 49,670,000 49,642,000 49,537,000 49,504,000 49,470,000 49,437,000 59,404,000 59,308,000 88,017,000 133,434,000 132,024,000 147,840,000 149,072,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000 150,000,000        
        and 13,149,315 and 13,049,820 shares outstanding
      		                                                         
        at december 31, 2021, and 2020, respectively
      		               13,000                                          
        13,124,110 and 13,049,820 shares outstanding
      		                                                         
        at september 30, 2021, and december 31, 2020, respectively
      		                13,000                                         
        13,121,087 and 13,049,820 shares outstanding
      		                                                         
        at june 30, 2021, and december 31, 2020, respectively
      		                 13,000                                        
        13,065,654 and 13,049,820 shares outstanding
      		                                                         
        at march 31, 2021, and december 31, 2020, respectively
      		                  13,000                                       
        and 13,049,820 and 12,955,351 shares outstanding
      		                                                         
        at december 31, 2020, and 2019, respectively
      		                   13,000                                      
        13,006,427 and 12,955,351 shares outstanding
      		                                                         
        at september 30, 2020, and december 31, 2019, respectively
      		                    13,000                                     
        130,061,248 and 129,553,517 shares outstanding
      		                                                         
        at june 30, 2020, and december 31, 2019, respectively
      		                     130,000                                    
        retained deficit
      		                     -234,706,000 -225,834,000 -218,437,000 -220,519,000 -220,302,000 -225,913,000 -232,068,000 -239,702,000 -243,052,000 -242,094,000 -243,388,000 -241,998,000 -240,091,000 -234,156,000 -220,358,000 -203,791,000 -185,550,000 -172,152,000                   
        129,643,509 and 129,553,517 shares outstanding
      		                                                         
        at march 31, 2020, and december 31, 2019, respectively
      		                      130,000                                   
        accounts payable:
      		                                                         
        related parties
      		                        19,000 28,000 28,000 28,000 28,000 28,000 31,000 28,000 31,000 28,000 28,000 31,000 28,000 82,000 70,000 45,000 86,000 86,000 69,000 55,000 233,000 31,000 28,000 50,000 120,000 127,000 247,000 203,000 18,000 359,000 93,000 134,000 14,000 
        and 129,553,517 and 128,716,595 shares outstanding
      		                                                         
        at december 31, 2019, and 2018, respectively
      		                       130,000                                  
        intangible assets
      		                        19,184,000 15,892,000                                
        129,170,282 and 128,716,595 shares outstanding
      		                                                         
        at september 30, 2019, and december 31, 2018, respectively
      		                        129,000                                 
        at june 30, 2019, and december 31, 2018, respectively
      		                         129,000                                
        128,781,031 and 128,716,595 shares outstanding
      		                                                         
        at march 31, 2019, and december 31, 2018, respectively
      		                          129,000                               
        and 128,716,595 and 127,646,530 shares outstanding
      		                                                         
        at december 31, 2018, and 2017, respectively
      		                           129,000                              
        accumulated other comprehensive loss
      		                                     -3,000 -22,000 -52,000 -38,000 -53,000 -18,000 -28,000    -10,000 -50,000 -250,000 -1,657,000 -1,729,000 -1,314,000 -1,354,000 -1,392,000 -1,431,000 -839,000 
        128,232,942 and 127,646,530 shares outstanding
      		                                                         
        at september 30, 2018, and december 31, 2017, respectively
      		                            128,000                             
        at june 30, 2018, and december 31, 2017, respectively
      		                             128,000                            
        127,688,437 and 127,646,530 shares outstanding
      		                                                         
        at march 31, 2018, and december 31, 2017, respectively
      		                              128,000                           
        and 127,646,530 and 75,839,998 shares outstanding
      		                                                         
        at december 31, 2017, and 2016, respectively
      		                               128,000                          
        and 127,075,201 and 75,839,998 shares outstanding
      		                                                         
        at september 30, 2017, and december 31, 2016, respectively
      		                                127,000                         
        and 126,536,091 and 75,839,998 shares outstanding
      		                                                         
        at june 30, 2017, and december 31, 2016, respectively
      		                                 127,000                        
        and 125,995,330 and 75,839,998 shares outstanding
      		                                                         
        at march 31, 2017, and december 31, 2016, respectively
      		                                  126,000                       
        authorized; and 75,839,998 and 75,702,700 shares
      		                                                         
        outstanding at december 31, 2016, and 2015, respectively
      		                                   76,000                      
        75,839,998 and 75,702,700 shares outstanding at september 30, 2016, and december 31, 2015, respectively
      		                                    76,000                     
        75,838,782 and 75,702,700 shares outstanding at june 30, 2016, and december 31, 2015, respectively
      		                                     76,000                    
        75,702,700 shares outstanding at march 31, 2016, and december 31, 2015, respectively
      		                                      76,000                   
        authorized; and 75,702,700 and 75,536,741 shares
      		                                                         
        outstanding at december 31, 2015, and 2014, respectively
      		                                       76,000                  
        retained (deficit) earnings
      		                                       -153,725,000                  
        current deferred tax asset
      		                                        2,025,000 5,630,000 280,000 3,356,000 5,228,000 5,525,000 6,987,000 8,341,000 3,803,000 4,138,000 3,900,000 2,005,000 4,207,000 3,362,000 4,352,000 4,931,000 719,000 
        75,536,741 shares outstanding at september 30, 2015, and december 31, 2014, respectively
      		                                        76,000                 
        75,536,741 shares outstanding at june 30, 2015, and december 31, 2014, respectively
      		                                         76,000                
        75,536,741 shares outstanding at march 31, 2015, and december 31, 2014, respectively
      		                                          76,000               
        authorized; and 75,536,741 and 75,405,410 shares
      		                                                         
        outstanding at december 31, 2014, and 2013, respectively
      		                                           76,000              
        75,405,410 shares outstanding at september 30, 2014, and december 31, 2013, respectively
      		                                            76,000             
        accumulated other comprehensive income
      		                                            2,000 2,000 2,000           
        75,405,410 shares outstanding at june 30, 2014, and december 31, 2013, respectively
      		                                             76,000            
        shares outstanding at march 31, 2014, and december 31, 2013, respectively
      		                                              76,000           
        property, plant, and equipment, net of accumulated depreciation
      		                                                         
        of 197,108 and 142,137, respectively
      		                                               689,662,000          
        mineral properties and development costs, net of accumulated
      		                                                         
        depletion of 13,165 and 11,060, respectively
      		                                               136,907,000          
        authorized; and 75,405,410 and 75,312,805 shares
      		                                                         
        outstanding at december 31, 2013, and 2012, respectively
      		                                               75,000          
        of 182,451 and 142,137, respectively
      		                                                652,172,000         
        depletion of 12,484 and 11,060, respectively
      		                                                131,993,000         
        authorized; and 75,394,377 and 75,312,805 shares
      		                                                         
        outstanding at september 30, 2013, and december 31, 2012, respectively
      		                                                75,000         
        of 167,713 and 142,137, respectively
      		                                                 616,226,000        
        depletion of 12,096 and 11,060, respectively
      		                                                 123,764,000        
        outstanding at june 30, 2013, and december 31, 2012, respectively
      		                                                 75,000        
        of 154,543 and 142,137, respectively
      		                                                  573,323,000       
        depletion of 11,638 and 11,060, respectively
      		                                                  114,382,000       
        authorized; and 75,376,697 and 75,312,805 shares
      		                                                         
        outstanding at march 31, 2013, and december 31, 2012, respectively
      		                                                  75,000       
        of 142,137 and 98,654, respectively
      		                                                   543,169,000      
        depletion of 11,060 and 9,773, respectively
      		                                                   94,096,000      
        authorized; and 75,312,805 and 75,207,533 shares
      		                                                         
        outstanding at december 31, 2012, and 2011, respectively
      		                                                   75,000      
        income tax receivable
      		                                                     1,715,000 2,482,000   
        of 130,103 and 98,654, respectively
      		                                                    484,563,000     
        depletion of 10,613 and 9,773, respectively
      		                                                    69,969,000     
        and 75,299,126 and 75,207,533 shares outstanding
      		                                                         
        at september 30, 2012, and december 31, 2011, respectively
      		                                                    75,000     
        of 119,135 and 98,654, respectively
      		                                                     447,249,000    
        depletion of 10,351 and 9,773, respectively
      		                                                     44,571,000    
        and 75,297,477 and 75,207,533 shares outstanding
      		                                                         
        at june 30, 2012, and december 31, 2011, respectively
      		                                                     75,000    
        of 108,535 and 98,654, respectively
      		                                                      401,485,000   
        depletion of 10,168 and 9,773, respectively
      		                                                      39,151,000   
        and 75,250,041 and 75,207,533 shares outstanding
      		                                                         
        at march 31, 2012, and december 31, 2011, respectively
      		                                                      75,000   
        of 98,654 and 66,615, respectively
      		                                                       387,423,000  
        depletion of 9,773 and 8,431, respectively
      		                                                       33,482,000  
        deferred insurance proceeds
      		                                                         
        authorized; and 75,207,533 and 75,110,875 shares
      		                                                         
        outstanding at december 31, 2011 and 2010, respectively
      		                                                       75,000  
        property, plant and equipment, net of accumulated depreciation
      		                                                         
        of 33,332 and 26,514, respectively
      		                                                        176,703,000 
        depletion of 6,771 and 6,367, respectively
      		                                                        33,575,000 
        74,846,874 shares outstanding at june 30, 2009, and december 31, 2008, respectively
      		                                                        75,000 
      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 2009-06-30 2008-09-30 
                                                                 
          cash flows from operating activities:
        		                                                         
          net income
        		3,745,000 3,263,000 4,606,000 -207,049,000 -1,833,000 -833,000 -3,130,000 -37,288,000 -7,196,000 4,305,000 4,506,000 3,982,000 13,108,000 23,708,000 31,422,000 223,861,000 4,023,000 19,499,000 2,451,000 -710,000 -10,175,000 -8,872,000 -7,397,000 2,082,000 -217,000 5,611,000 6,155,000 7,634,000 3,350,000 -958,000 1,757,000       -13,398,000 -18,427,000 -518,258,000 -8,110,000 -4,937,000 6,529,000 5,791,000 -1,237,000 5,562,000 -355,000 -5,987,000 2,026,000 11,317,000 14,919,000 14,537,000 33,267,000 19,013,000 20,626,000 39,117,000 49,719,000 
          adjustments to reconcile net income to net cash from operating activities:
        		                                                         
          depreciation, depletion and amortization
        		9,431,000 9,569,000 10,482,000  9,033,000 8,594,000 9,304,000  10,122,000 8,891,000 9,292,000  8,362,000 8,025,000 8,898,000  8,430,000 8,598,000 9,481,000  8,748,000 8,043,000 9,586,000  8,514,000 8,073,000 8,746,000                               
          accretion of asset retirement obligation
        		657,000 658,000 657,000 622,000 623,000 622,000 622,000 535,000 535,000 535,000 535,000 490,000 491,000 490,000 490,000 535,000 441,000 441,000 441,000 435,000 434,000 434,000 435,000 446,000 513,000 417,000 417,000                               
          amortization of deferred financing costs
        		75,000 76,000 75,000 75,000 75,000 76,000 75,000 75,000 75,000 76,000 75,000 78,000 67,000 60,000 60,000 60,000 60,000 126,000 68,000 68,000 196,000 75,000 86,000 86,000 80,000 69,000 68,000 182,000 183,000 184,000 183,000 182,000 246,000 529,000 821,000 -115,000 562,000 883,000 783,000                   
          amortization of intangible assets
        		82,000 82,000 82,000 82,000 82,000 84,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000 81,000 80,000                                   
          stock-based compensation
        		1,380,000 1,295,000 1,099,000 848,000 178,000 1,235,000 1,322,000 1,463,000 1,522,000 1,803,000 1,746,000 2,187,000 1,407,000 1,391,000 1,167,000 723,000 634,000 765,000 890,000 840,000 986,000 963,000 1,032,000 1,044,000 975,000 1,231,000 1,031,000 586,000 1,299,000 1,347,000 947,000 944,000 993,000 696,000 989,000 1,047,000 852,000 654,000 1,046,000 1,300,000 1,185,000 1,533,000 1,062,000 1,017,000 689,000 1,503,000 1,028,000 1,242,000 1,204,000 1,537,000 1,140,000 1,438,000 973,000 1,386,000 1,319,000 1,287,000 2,622,000 
          lower of cost or net realizable value inventory adjustments
        		406,000 419,000 1,335,000 1,631,000 471,000 1,352,000 503,000 3,079,000            0 1,224,000 2,241,000 550,000 348,000                                  
          impairment of long-lived assets
        		0 1,204,000 662,000 7,626,000 874,000 831,000 1,377,000 42,767,000                                                  
          loss on disposal of assets
        		-2,239,000 -1,274,000 -182,000 1,326,000 134,000 241,000 251,000  59,000 -7,000 200,000 6,294,000 10,000 1,066,000 100,000   -2,567,000 2,000   234,000 -4,696,000   20,000 19,000 -3,000 0 -50,000 -34,000 81,000 185,000 5,000 1,559,000                       
          allowance for doubtful accounts
        		0 -75,000 137,000     0            -200,000 0 0 275,000 25,000    0 -279,000   445,000                          
          allowance for parts inventory obsolescence
        		294,000    171,000 419,000 53,000      150,000        0    0 0 4,000  0        -104,000 86,000 532,000                   
          loss on equity investment
        		0                                                         
          equity in loss (earnings) of unconsolidated entities
        		86,000                                                         
          changes in operating assets and liabilities:
        		                                                         
          trade accounts receivable
        		-4,276,000 27,173,000 -25,519,000 9,638,000 -10,605,000 20,208,000 -19,749,000 2,014,000 -381,000 15,391,000 -12,474,000 11,493,000 -5,590,000 18,969,000 -16,199,000 -2,679,000 -9,701,000 13,868,000 -14,103,000 955,000 -4,015,000 12,606,000 -8,388,000 7,363,000 -6,633,000 3,664,000 -3,057,000 -6,872,000 3,198,000 8,018,000 -11,828,000 2,345,000 -6,810,000 7,642,000 -8,776,000 6,786,000 -8,143,000 15,446,000 -14,689,000 11,615,000 -5,716,000 22,874,000 -9,955,000 3,998,000 478,000 -2,769,000 -9,431,000 4,557,000 10,428,000 8,401,000 -12,715,000 16,287,000 -15,848,000 11,744,000 -14,387,000 -3,827,000 -7,229,000 
          other receivables
        		-950,000 194,000 -1,676,000 1,887,000 -995,000 -497,000 247,000 958,000 -700,000 -867,000 -92,000 1,251,000 -465,000 -262,000 -384,000 2,461,000 -979,000 -173,000 -720,000 719,000 -593,000 -427,000 -308,000 729,000 -247,000 -770,000 -362,000 3,204,000 -1,706,000 -1,126,000 -207,000 90,000 530,000 -491,000 -399,000 2,172,000 -469,000 -535,000 -191,000 1,741,000 4,056,000 -3,990,000 319,000 2,063,000 -560,000 5,670,000 -3,316,000 911,000 2,249,000 -1,148,000 -344,000 537,000 -567,000 -1,175,000 -1,018,000 -279,000  
          inventory
        		-12,636,000 -5,183,000 18,784,000 -10,385,000 -9,774,000 -1,509,000 10,835,000 -14,240,000 -8,384,000 3,118,000 7,645,000 -17,329,000 -13,195,000 -3,606,000 847,000 -4,320,000 -2,089,000 4,474,000 9,293,000 -3,391,000 -5,761,000 3,885,000 4,976,000 -8,298,000 -3,317,000 4,181,000 -4,091,000 -5,698,000 -7,096,000 6,718,000 6,009,000 -4,654,000 -7,070,000 3,341,000 1,643,000 3,961,000 438,000 -8,893,000 -7,745,000 -20,803,000 -23,482,000 -18,857,000 7,954,000 -6,612,000 2,936,000 5,767,000 6,743,000 -18,274,000 -20,775,000 -9,817,000 -8,781,000 475,000 2,396,000 -5,654,000 4,247,000 -14,169,000 -1,043,000 
          prepaid expenses and other current assets
        		-2,396,000 497,000 330,000  -2,501,000 1,353,000 922,000  -1,804,000 656,000 250,000  -2,177,000 749,000 -76,000  -1,643,000 137,000 358,000  -1,743,000 573,000 857,000  -1,978,000 1,088,000 103,000  -779,000 514,000 914,000  276,000 3,723,000 4,393,000  -2,703,000 7,374,000 7,303,000                   
          deferred tax assets
        		   195,402,000 -65,000 -325,000 -789,000 -10,227,000 -1,920,000 2,015,000 1,661,000 1,775,000 4,607,000 7,941,000 9,000,000                                           
          accounts payable, accrued liabilities, and accrued employee compensation and benefits
        		6,118,000 -2,086,000 307,000 -7,528,000 10,901,000 -3,271,000 -3,621,000 6,500,000 2,916,000 -2,827,000 -5,305,000 -4,595,000 12,411,000 -10,550,000 -862,000 -1,798,000 9,231,000 -1,955,000 7,978,000 -1,740,000 2,543,000 -6,591,000 8,119,000 -3,541,000 5,218,000 -1,852,000 2,455,000 -1,336,000 6,273,000 -3,198,000 1,000 -3,666,000 5,417,000 -5,495,000 -65,000 -7,230,000 244,000 -11,997,000 6,596,000 -11,195,000 5,398,000 -936,000 1,180,000 -8,017,000 10,702,000 -372,000 -335,000 -4,005,000 4,658,000 890,000 -4,295,000 608,000 -6,234,000 11,212,000 1,738,000   
          operating lease liabilities
        		-357,000 -112,000 -378,000 -345,000 -334,000 -356,000 -384,000 -517,000 -409,000 -408,000 -401,000 -406,000 -386,000 -438,000 -795,000 -892,000 -555,000 -536,000 -525,000 -539,000 -645,000 -498,000 -552,000 -616,000 -504,000 -491,000 -479,000                               
          deferred other income
        		-564,000 -564,000 -564,000 -564,000 -564,000 -562,000 44,434,000                                                   
          other liabilities
        		-2,843,000 2,120,000 206,000 2,471,000 -603,000 -32,000 -671,000 440,000 924,000 -3,454,000 1,232,000 3,243,000 -32,231,000 -105,000 362,000 219,000 50,000 -318,000 3,415,000 3,920,000 3,688,000 5,730,000 41,000 2,953,000 2,835,000 2,474,000 -2,888,000 2,073,000 2,108,000 4,385,000 3,681,000 883,000 -24,000 62,000 -819,000 21,000 -377,000 -1,137,000 40,000 -1,393,000 -280,000 1,510,000 -92,000 -31,000 -106,000 -136,000 -700,000 -474,000 -396,000 1,533,000 -1,975,000 732,000 1,466,000 -473,000 -8,000   
          net cash from operating activities
        		-3,987,000 39,943,000 10,917,000 7,559,000 -4,342,000 27,746,000 41,532,000 4,604,000 -323,000 30,499,000 8,449,000 19,709,000 -14,117,000 49,119,000 34,110,000 19,644,000 7,987,000 32,327,000 19,109,000 12,658,000 -5,061,000 8,777,000 14,771,000 11,764,000 5,879,000 23,617,000 8,121,000 11,292,000 14,769,000 24,272,000 13,904,000 3,157,000 2,549,000 9,693,000 1,816,000 -4,716,000 -13,957,000 1,497,000 -1,094,000 -20,902,000 -11,602,000 22,520,000 32,674,000 22,651,000 48,986,000 38,525,000 17,324,000 2,771,000 14,683,000 35,823,000 11,621,000 55,514,000 33,442,000 61,214,000 37,664,000   
          capital expenditures
        		-7,748,000 -4,137,000 -8,272,000 -6,123,000 -9,609,000 -11,301,000 -11,673,000 -6,576,000 -16,550,000 -20,895,000 -21,039,000 -31,596,000 -14,326,000 -15,979,000 -6,795,000 -7,352,000 -5,811,000 -4,266,000 -2,360,000 -2,356,000 -3,442,000 -4,935,000 -5,710,000 -3,888,000 -4,431,000 0 -3,958,000 -4,223,000 -3,790,000 -2,408,000 -6,470,000 -7,279,000 -2,667,000 -1,136,000 -2,423,000 -3,636,000 -2,481,000 -5,757,000 -6,018,000 0 -17,993,000 -10,311,000 -8,678,000 0 -10,186,000 -13,220,000 -31,919,000 -55,334,000 -54,913,000 -54,990,000 -39,512,000 -69,895,000 -47,285,000 -43,360,000 -32,409,000   
          free cash flows
        		-11,735,000 35,806,000 2,645,000 1,436,000 -13,951,000 16,445,000 29,859,000 -1,972,000 -16,873,000 9,604,000 -12,590,000 -11,887,000 -28,443,000 33,140,000 27,315,000 12,292,000 2,176,000 28,061,000 16,749,000 10,302,000 -8,503,000 3,842,000 9,061,000 7,876,000 1,448,000 23,617,000 4,163,000 7,069,000 10,979,000 21,864,000 7,434,000 -4,122,000 -118,000 8,557,000 -607,000 -8,352,000 -16,438,000 -4,260,000 -7,112,000 -20,902,000 -29,595,000 12,209,000 23,996,000 22,651,000 38,800,000 25,305,000 -14,595,000 -52,563,000 -40,230,000 -19,167,000 -27,891,000 -14,381,000 -13,843,000 17,854,000 5,255,000   
          cash flows from investing activities:
        		                                                         
          additions to property, plant, equipment, mineral properties and other assets
        		-7,748,000 -4,137,000 -8,272,000 -6,123,000 -9,609,000 -11,301,000 -11,673,000 -6,576,000 -16,550,000 -20,895,000 -21,039,000 -31,596,000 -14,326,000 -15,979,000 -6,795,000 -7,352,000 -5,811,000 -4,266,000 -2,360,000 -2,356,000 -3,442,000 -4,935,000 -5,710,000 -3,888,000 -4,431,000                                 
          proceeds from sale of assets
        		2,361,000 1,378,000 2,104,000  5,000 55,000 4,596,000  36,000 24,000 65,000  0 22,000 24,000  0 5,995,000 47,000  0 0 4,786,000                                   
          proceeds from redemptions/maturities of investments
        		0 500,000 500,000 1,000,000 500,000 1,000,000 500,000 1,500,000 500,000 2,500,000 1,500,000 1,002,000                                              
          other investing
        		0   1,120,000 0   128,000 160,000                                                 
          net cash from investing activities
        		-5,387,000 -130,000 -5,668,000 -4,020,000 -9,104,000 -9,830,000 -6,577,000 -4,948,000 -15,854,000 -18,322,000 -20,430,000 -30,765,000 -14,787,000 -25,953,000 -7,674,000 -8,428,000 -5,811,000 1,729,000 -2,313,000 -2,356,000 -3,442,000 -8,435,000 -924,000 -3,888,000 -7,723,000 -61,822,000 -7,208,000 -4,205,000 -3,790,000 -2,350,000 -6,436,000 -7,180,000 -2,667,000 -1,136,000 3,131,000 1,269,000 7,141,000 6,484,000 17,616,000 5,888,000 -3,997,000 -49,028,000 -32,440,000 -25,839,000 -9,222,000 -10,690,000 -13,873,000 -12,748,000 -51,605,000 -142,534,000 -39,552,000 -20,324,000 -45,389,000 -53,990,000 -50,480,000   
          cash flows from financing activities:
        		                                                         
          repayments of short-term borrowings on credit facility
        		    0 0 -4,000,000  0               0 -500,000   0 0 -1,500,000 -15,900,000 -9,100,000                          
          payments of financing lease
        		-235,000 -257,000 -243,000  -180,000 -176,000 -324,000 -198,000 -189,000 -167,000 -43,000     0 0 -1,151,000 -107,000                                       
          employee tax withholding paid for restricted stock upon vesting
        		-34,000 -174,000 -682,000  0 -142,000 -633,000  0 -300,000 -1,037,000  0 -1,548,000 -2,814,000  -2,000 -176,000 -204,000  78,000 -125,000 -49,000  0 -166,000 -112,000  0 -309,000 -62,000  0 -49,000 -109,000 -1,000 0 0 -172,000 -1,000 -8,000 7,000 -1,037,000 -56,000 0 0 -611,000 -75,000 0 0 -577,000 -132,000 0 -322,000 -424,000   
          proceeds from exercise of stock options
        		1,804,000 0 38,000         0 0 20,000 90,000 8,000 30,000 8,000 43,000     12,000 0 0 9,000 67,000 0 36,000 11,000                     0      
          net cash from financing activities
        		1,535,000 -431,000 -887,000 -262,000 -180,000 -318,000 -4,957,000 1,628,000 1,811,000 -5,467,000 3,920,000 -19,638,000 -3,814,000 -1,528,000 -2,724,000 -401,000 -29,789,000 -16,800,000 -292,000 -42,000 -16,791,000 -10,161,000 9,951,000 -296,000 -640,000 19,834,000 -103,000 -11,077,000 0 -1,773,000 -2,451,000 3,397,000 -4,378,000 -23,137,000 11,359,000 -15,068,000 -1,189,000 -1,419,000 -1,407,000 -1,000 -364,000 7,000 -1,037,000 -56,000 0 0 -611,000 -75,000 -429,000 149,397,000 -577,000 -56,686,000 219,000 -488,000 -449,000   
          net change in cash, cash equivalents and restricted cash
        		-7,839,000 39,382,000 4,362,000  -13,626,000 17,598,000 29,998,000  -14,366,000 6,710,000 -8,061,000  -32,718,000 21,638,000 23,712,000  -27,613,000 17,256,000 16,504,000  -25,294,000 -9,819,000 23,798,000  -2,484,000 -18,371,000 810,000  10,979,000 20,149,000 5,017,000                           
          cash, cash equivalents and restricted cash, beginning of period
        		0 0 41,898,000  0 0 4,651,000  0 0 19,084,000  0 0 37,146,000  0 0 20,184,000  0 0 21,239,000  0 0 33,704,000  0 0 1,549,000                           
          intrepid potash, inc.
        		                                                         
          condensed consolidated statements of cash flows
        		                                                         
          cash, cash equivalents and restricted cash, end of period
        		-7,839,000 39,382,000 46,260,000  -13,626,000 17,598,000 34,649,000  -14,366,000 6,710,000 11,023,000  -32,718,000 21,638,000 60,858,000  -27,613,000 17,256,000 36,688,000  -25,294,000 -9,819,000 45,037,000  -2,484,000 -18,371,000 34,514,000  10,979,000 20,149,000 6,566,000                           
          supplemental disclosure of cash flow information
        		                                                         
          net cash paid during the period for:
        		                                                         
          interest
        		99,000   121,000 96,000   124,000 114,000 114,000 59,000  22,000 22,000 22,000  74,000      227,000  296,000 1,113,000 49,000  53,000 1,481,000 95,000  711,000 5,910,000 2,467,000  26,000 3,087,000 134,000    161,000  126,000 2,708,000 112,000         793,000 109,000 
          income taxes
        		32,000   0 4,000   -116,000 30,000 256,000 9,000 336,000 345,000 321,000 13,000 62,000 40,000       -26,000 870,000   -641,000 7,000 8,000 -2,843,000 -3,000 -1,506,000 0 10,000 -12,000 0 -50,000 -38,000 -12,000 -16,000 30,000 11,000 -206,000 -14,207,000 -72,000 -2,025,000 -2,277,000 0 108,000 2,194,000 7,217,000 272,000 295,000 595,000 6,800,000  
          amounts included in the measurement of operating lease liabilities
        		418,000    351,000    453,000 444,000 460,000  436,000 441,000 542,000  600,000      637,000                                   
          accrued purchases for property, plant, equipment, and mineral properties
        		-1,105,000   9,000 -777,000   1,337,000 -4,016,000 -153,000 7,410,000 1,159,000 3,896,000 1,972,000 1,505,000 350,000 422,000      2,557,000 3,272,000 -1,425,000 1,739,000 1,435,000 167,000 264,000 -282,000 933,000 2,695,000 1,131,000 28,000 214,000  257,000 -1,460,000 2,004,000  -4,847,000 3,457,000 2,100,000  -3,543,000 -5,500,000 13,172,000           
          right-of-use assets exchanged for operating lease liabilities
        		0        0    794,000 248,000 546,000  206,000      104,000  -168,000                                 
          right-of-use assets exchanged for financing lease liabilities
        		856,000    1,067,000    438,000 894,000 1,677,000                                               
          unrealized loss on equity investment
        		  474,000 165,000                                                      
          equity in earnings of unconsolidated entities
        		      -149,000 194,000 54,000 1,059,000 -821,000 77,000                                              
          depreciation, depletion, and amortization
        		                                                         
          reserve for obsolescence
        		                                                         
          distribution of earnings from unconsolidated entities
        		       0 0 132,000 320,000                                               
          other current assets
        		                                                         
          additions to intangible assets
        		                       0 -3,292,000                                 
          proceeds from sale of property, plant, equipment, and mineral properties
        		                       0 0   18,000 0 58,000 34,000 99,000 0 0 5,553,000                       
          purchase of investments
        		       0 0 -459,000 -956,000 -183,000 -1,965,000                                             
          proceeds from borrowings on credit facility
        		                                                         
          repayments of borrowings on credit facility
        		                                                         
          payments of financing leases
        		                                                         
          capitalized debt costs
        		                       -46,000                                  
          employee tax withholding paid for restricted shares upon vesting
        		                                                         
          repurchases of common stock
        		           -19,131,000                                              
          net change in cash, cash equivalents, and restricted cash
        		                                                         
          cash, cash equivalents, and restricted cash, beginning of period
        		                                                         
          cash, cash equivalents, and restricted cash, end of period
        		                                                         
          equity in (earnings) loss of unconsolidated entities
        		    289,000                                                     
          proceeds from short-term borrowings on credit facility
        		        2,000,000 0 5,000,000          0 0 10,000,000 0 317,000   0 0 0 13,500,000 13,000,000                          
          gain on disposal of assets
        		                                                         
          gain on extinguishment of debt
        		               0 0                                         
          income tax payable
        		                   0 -49,000   49,000 -816,000   704,000 38,000                             
          repayment of long-term debt
        		                                                         
          debt prepayment costs
        		               0 0 -503,000 -2,000 0                                      
          capitalized debt fees
        		                    0                                     
          other
        		                   0 0              3,006,000 10,000 35,000 192,000 243,000 254,000 545,000 670,000 378,000 154,000 224,000 -275,000 223,000 410,000 751,000 928,000 433,000 888,000 954,000 1,022,000 963,000 577,000  
          proceeds from loan under cares act
        		                   0 0                                     
          interest, net of 0.3 million of capitalized interest in 2022, 0.1 million in 2021, and 0.1 million in 2020
        		                                                         
          repayments of long-term debt
        		                0 -14,978,000 -22,000  -15,000,000            -6,000,000 -23,000,000 -46,000,000                       
          long-term investment
        		              -903,000     0 0                                     
          (gain) loss on disposal of assets
        		                                                         
          net cash paid (received) during the period for:
        		                                                         
          interest, net of 0.1 million of capitalized interest in 2021, 0.1 million in 2020, and 0.2 million in 2019
        		                                                         
          accrual for litigation settlement
        		                      10,075,000                                   
          refundable income taxes
        		                           0 0 -181,000 2,844,000 -2,663,000 1,376,000 8,000 -5,000 -1,255,000 1,000 51,000 40,000 -117,000 90,000 -215,000 41,000 413,000 14,207,000 -1,036,000 2,025,000 -11,218,000 -1,123,000 -79,000 3,000     3,386,000  
          interest, net of 0.1 million of capitalized interest in 2020, 0.2 million in 2019, and 0.1 million in 2018
        		                                                         
          deposit on asset purchase
        		                          -3,250,000                               
          issuance of common stock, net of transaction expenses
        		                                                         
          interest, net of 0.2 million of capitalized interest in 2019, and 0.1 million in both 2018 and 2017
        		                                                         
          net cash paid (refunded) during the period for:
        		                                                         
          additions to property, plant, equipment, and mineral properties
        		                          -3,958,000 -4,223,000 -3,790,000 -2,408,000 -6,470,000 -7,279,000 -2,667,000 -1,136,000 -2,423,000 -3,636,000 -2,481,000 -5,757,000 -6,018,000  -17,993,000 -10,311,000 -8,678,000  -10,186,000 -13,220,000 -31,919,000           
          right-of-use assets exchanged for new operating lease liabilities
        		                          5,916,000                               
          depreciation and depletion
        		                                                         
          purchases of investments
        		                                   0 -8,825,000   3,000 -6,344,000 -44,627,000 -27,600,000 -20,190,000 0 -2,000 -5,000 0 -1,000   -2,034,000 -17,691,000 -34,907,000 -30,727,000 -751,000  
          proceeds from sale of investments
        		                               0 0 0 1,000 4,905,000 18,447,000 13,741,000 23,634,000 14,919,000 20,340,000 5,910,000 3,838,000  964,000 2,532,000 18,051,000           
          debt issuance costs
        		                               -1,000 -29,000   -67,000 -1,189,000 -1,419,000 -1,235,000 0        0 -429,000   -80,000      
          interest, net of 0.1 million, 0.1 million, and 0.4 million of capitalized interest
        		                                                         
          depreciation, depletion, and accretion
        		                            8,180,000 7,977,000 8,932,000 8,877,000 8,270,000 8,297,000 9,323,000 9,716,000 8,756,000 9,841,000 14,368,000 26,648,000 20,355,000 19,397,000 21,276,000 20,930,000 20,107,000 19,874,000 19,649,000 17,263,000 15,561,000 14,338,000 14,141,000       
          lower-of-cost-or-market inventory adjustments
        		                            0 76,000 705,000 2,516,000 667,000 317,000 3,824,000 3,245,000 5,192,000 2,930,000 9,007,000 21,709,000 4,427,000 5,276,000 360,000 76,000 3,404,000 1,140,000 3,566,000           
          issuance of common stock, net of transaction costs
        		                                1,651,000 11,000 57,468,000                       
          adjustments to reconcile net loss to net cash from operating activities:
        		                                                         
          net loss
        		                               -1,390,000 -1,907,000 -5,935,000 -13,678,000                       
          deferred income taxes
        		                                       155,232,000 -7,890,000 -202,000 2,956,000 2,152,000 -3,000 2,750,000 -2,778,000 13,793,000 773,000 7,145,000 8,381,000 9,423,000 7,105,000 11,441,000 10,042,000 18,033,000 7,071,000 
          net change in cash and cash equivalents
        		                               -626,000 -4,496,000 -14,580,000 16,306,000 -18,515,000 -8,005,000 6,562,000 15,115,000 -15,015,000 -15,963,000 -26,501,000 -803,000 -3,244,000 39,764,000 27,835,000 2,840,000 -10,052,000 -37,351,000 42,686,000 -28,508,000 -21,496,000 -11,728,000 6,736,000 -13,265,000 2,100,000 49,001,000 
          cash and cash equivalents, beginning of period
        		                               0 0 0 4,464,000 0 0 0 9,307,000 0 0 0 67,589,000 0 0 0 394,000 0 0 0 33,619,000 0 0 0 73,372,000 116,573,000  
          cash and cash equivalents, end of period
        		                               -626,000 -4,496,000 -14,580,000 20,770,000 -18,515,000 -8,005,000 6,562,000 24,422,000 -15,015,000 -15,963,000 -26,501,000 66,786,000 -3,244,000 39,764,000 27,835,000 3,234,000 -10,052,000 -37,351,000 42,686,000 5,111,000 -21,496,000 -11,728,000 6,736,000 60,107,000 118,673,000 49,001,000 
          interest, net of 0.1 million, 0.4 million, and 0.3 million of capitalized interest
        		                                                         
          interest, net of 0.4 million, 0.2 million, and 0.4 million of capitalized interest
        		                                                         
          accrued purchases for property, plant, equipment, and mineral properties including capitalized interest
        		                                                         
          loss on settlement of pension liabilities
        		                                                         
          additions to property, plant, and equipment and mineral properties
        		                                                         
          proceeds from sale of property, plant, and equipment, and mineral properties
        		                                                         
          proceeds from long-term debt
        		                                               0 0         
          interest, net of 0.2 million, 0.4 million, and 2.6 million of capitalized interest
        		                                                         
          accrued purchases for property, plant, and equipment, and mineral properties
        		                                                         
          prepaid expenses and other assets
        		                                        -2,180,000 397,000 666,000 717,000 -1,855,000 847,000 1,005,000 1,123,000 -2,765,000 778,000 714,000 1,303,000 -3,608,000 828,000 1,099,000 1,728,000 -3,723,000 
          interest, net of 0.0 million, and 0.4 million of capitalized interest
        		                                                         
          interest, net of 0 million, and 0.4 million of capitalized interest
        		                                                         
          reconciliation of net income to net cash from operating activities:
        		                                                         
          items not affecting cash:
        		                                                         
          unrealized derivative gain
        		                                                   -280,000 -272,000 -273,000 -224,000   
          proceeds from investments
        		                                               45,530,000 10,824,000 253,000 21,586,000 68,084,000 45,159,000 29,615,000 18,722,000   
          cash paid for common stock dividend
        		                                                         
          excess income tax benefit from stock-based compensation
        		                                                   0 246,000 -166,000 -25,000   
          interest, net of 0.4 million, 2.6 million, and 0 million of capitalized interest, including settlements on derivatives
        		                                                         
          insurance settlements income from property and business losses
        		                                                         
          lower of cost or market inventory adjustments
        		                                               1,558,000          
          additions to property, plant, and equipment
        		                                               -55,334,000 -54,913,000 -54,990,000 -39,512,000 -69,895,000 -47,285,000 -43,360,000 -32,409,000 -44,461,000 -17,485,000 
          additions to mineral properties and development costs
        		                                               -8,924,000 -7,555,000 -7,621,000 -21,636,000 -16,479,000 -25,572,000 -5,338,000 -6,068,000 -4,779,000 -234,000 
          proceeds from sale of property, plant, and equipment
        		                                                         
          proceeds from insurance settlements from property and business losses
        		                                                         
          interest, net of 2.6 million, 0 million, and 0 million of capitalized interest, including settlements on derivatives
        		                                                         
          accrued purchases for property, plant, and equipment, and mineral properties and development costs
        		                                               1,871,000 -3,095,000 3,904,000 27,012,000 -587,000 1,385,000 13,476,000 9,689,000   
          interest, net of 1.4 million and 2.6 million of capitalized interest for the three and nine months ended september 30, 2013, respectively
        		                                                         
          interest, net of 1.2 million of capitalized interest, for the three and six months ended june 30, 2013
        		                                                         
          interest, including settlements on derivatives
        		                                                  128,000 484,000 417,000 511,000 428,000   
          insurance settlements (income) from property and business losses
        		                                                         
          insurance settlement income from property and business losses
        		                                                         
          depreciation, depletion, amortization, and accretion
        		                                                    12,095,000 11,376,000 11,256,000   
          income tax receivable
        		                                                    1,715,000 767,000 2,011,000   
          insurance settlement proceeds from property and business losses
        		                                                         
          proceeds from liquidation of bond sinking fund
        		                                                         
          reconciliation of net income to net cash
        		                                                         
          provided by operating activities:
        		                                                         
          insurance reimbursements
        		                                                       16,000 1,000 
          depreciation, depletion, amortization and accretion
        		                                                       7,747,000 3,076,000 
          unrealized derivative loss
        		                                                       -1,215,000  
          accounts payable, accrued liabilities and accrued employee compensation and benefits
        		                                                       -1,492,000  
          income taxes payable
        		                                                        11,504,000 
          other current liabilities
        		                                                       465,000  
          total cash from operating activities
        		                                                       51,374,000 66,880,000 
          proceeds from insurance reimbursements
        		                                                       1,984,000 -1,000 
          cash received in exchange transaction with intrepid mining llc
        		                                                        0 
          total cash from investing activities
        		                                                       -47,991,000 -17,747,000 
          issuance of common stock, net of expenses
        		                                                        -132,000 
          repayments on long-term debt
        		                                                         
          payments to fund employee tax withholding due upon vesting of restricted common stock
        		                                                       -1,283,000  
          members' capital distributions
        		                                                         
          payments to intrepid mining llc for exchange of assets and liabilities and formation distribution
        		                                                        0 
          total cash from financing activities
        		                                                       -1,283,000 -132,000 
          cash paid during the period for:
        		                                                         
          capitalized loan fee write-off
        		                                                        0 
          loss on disposal of assets and other
        		                                                        1,080,000 
          financial instruments loss
        		                                                         
          bond sinking fund unrealized loss
        		                                                         
          insurance and other receivables
        		                                                        278,000 
          accounts payable and accrued liabilities
        		                                                        2,971,000 
          additions to bond sinking fund
        		                                                        -27,000 
          repayments on long-term debt, including long canyon note in 2007
        		                                                        0 
          repayment of loans by members
        		                                                         
          capital contribution, net of expenses
        		                                                         
          members’ capital distributions
        		                                                         
          financial instruments gain
        		                                                         
          bond sinking fund unrealized gain