7Baggers

Perma-Fix Environmental Services, Inc
(NASDAQ:PESI) 

PESI stock logo

Perma-Fix Environmental Services, Inc., through its subsidiaries, operates as an environmental and technology know-how company in the United States. It operates in three segments: Treatment, Services, and Medical. The Treatment segment offers nuclear, low-level radioactive, mixed waste, hazardous an...

Founded: 1990
Full Time Employees: 308
Sector: Industrials
Industry: Waste Management

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2019-12-31 2013-09-30 2012-12-31 2010-06-30 2009-09-30 2007-12-31 2007-03-31 
                          
      revenues
    11,126,000    13,919,000    13,617,000     15,915,000         
      cost of goods sold
    14,007,000 14,503,000 14,897,000 13,039,000 13,262,000 14,108,000 15,478,000 15,292,000 14,237,000 18,424,000 17,328,000 15,402,000 16,571,000 14,279,000  3,880,000 15,943,000  21,356,000 18,846,000  14,265,000 
      gross profit
    -2,881,000 1,212,000 2,557,000 1,547,000 657,000 594,000 1,334,000 -1,306,000 -620,000 4,295,000 4,549,000 3,070,000 2,884,000 1,636,000  7,894,000 3,129,000  6,740,000 7,688,000  5,890,000 
      yoy
    -538.51% 104.04% 91.68% -218.45% -205.97% -86.17% -70.67% -142.54% -121.50% 162.53%  -61.11% -7.83%   2.68%       
      qoq
    -337.71% -52.60% 65.29% 135.46% 10.61% -55.47% -202.14% 110.65% -114.44% -5.58% 48.18% 6.45% 76.28%   152.29%   -12.33%    
      selling, general and administrative expenses
    4,299,000 4,188,000 4,083,000 4,130,000 4,015,000 3,860,000 3,632,000 3,455,000 3,544,000 4,006,000 3,933,000 3,929,000 3,684,000 3,422,000  1,029,000 3,276,000  3,829,000 4,486,000  6,543,000 
      gain on disposal of property and equipment
        -5,000                  
      research and development
    303,000 254,000 342,000 312,000 383,000 300,000 303,000 273,000 296,000 221,000 120,000 69,000 80,000 96,000  -670,000 520,000      
      income from operations
    -7,483,000 -3,233,000 -1,872,000 -2,894,000 -3,736,000 -3,586,000 -2,601,000  -4,460,000 -9,000 496,000 -928,000  -1,883,000  8,683,000 -667,000  2,911,000    
      yoy
    100.29% -9.84% -28.03%  -16.23% 39744.44% -624.40%   -99.52%  -110.69%           
      qoq
    131.46% 72.70% -35.31% -22.54% 4.18% 37.87%   49455.56% -101.81% -153.45%     -1401.80%       
      other income:
                          
      interest income
    180,000 222,000 266,000 301,000 335,000 242,000 292,000 213,000 174,000 161,000 146,000 29,000 29,000 11,000  310,000 8,000  16,000 29,000  88,000 
      interest expense
    -59,000 121,000 -116,000 -124,000 -112,000 -127,000 -121,000 -109,000 -116,000 -134,000 -89,000 -47,000  -35,000  100,000 -187,000  -208,000 -331,000  -225,000 
      interest expense-financing fees
    -21,000 -21,000 -22,000 -21,000 -20,000 -19,000 -18,000 -16,000 -13,000 -13,000 -36,000 -16,000  -13,000  -121,000 -40,000  -103,000 -104,000  -48,000 
      other
    8,000 90,000 -18,000 155,000 33,000 105,000 59,000 1,000 1,000  -17,000 1,965,000  -2,000  231,000    -5,000  -14,000 
      loss from continuing operations before taxes
    -7,375,000 -2,821,000 -1,762,000 -2,583,000 -3,500,000    -4,414,000     -1,922,000  -1,594,750 -951,000      
      income tax expense
         135,000 6,417,000 -1,161,000  -465,000 254,000 179,000 347,000      1,101,000 165,000  126,000 
      loss from continuing operations, net of taxes
    -7,375,000 -2,821,000 -1,762,000 -2,583,000 -3,500,000    -3,458,000     -1,249,000  -1,109,000 -568,000      
      loss from discontinued operations
    -112,000    -73,000    -102,000     -94,000         
      net income
    -7,487,000 -5,660,000 -1,835,000 -2,716,000 -3,573,000 -3,489,000 -8,979,000 -3,951,000 -3,560,000 81,000 341,000 664,000  -1,343,000  6,851,000 -808,000     -1,084,000 
      yoy
    109.54% 62.22% -79.56% -31.26% 0.37% -4407.41% -2733.14% -695.03%  -106.03%  -90.31%           
      qoq
    32.28% 208.45% -32.44% -23.99% 2.41% -61.14% 127.26% 10.98% -4495.06% -76.25% -48.64%     -947.90%       
      net loss per common share - basic and diluted:
                          
      continuing operations
    -400 -150 -100 -140 -190 -210 -560 -260 -250 40 20 60  -90  630 -50  30 50  -20 
      discontinued operations
     -160  -10   -10 -10 -10  10 -10  -10  -30 -20      
      net loss per common share
    -400 -310 -100 -150 -190    -260     -100  -102.5 -70      
      weighted-average number of common shares used in computing net loss per share:
                          
      basic
    18,542 18,464 18,472 18,448 18,424 15,072                 
      diluted
    18,542 18,464 18,472 18,448 18,424 15,072                 
      net revenues
     15,715,000 17,454,000 14,586,000  14,702,000 16,812,000 13,986,000  22,719,000 21,877,000 18,472,000 19,455,000   11,774,000 19,072,000  28,096,000 26,534,000  20,155,000 
      loss on disposal of property and equipment
     3,000 4,000 -1,000  20,000  1,000      1,000  1,000       
      loss from discontinued operations, net of taxes
     -70,000 -73,000 -133,000    -166,000    -160,000    -56,000 -240,000     -126,000 
      income tax benefit
            -956,000     -673,000  -485,750 -383,000      
      income from continuing operations before taxes
         -3,385,000 -2,389,000   5,000 500,000        2,616,000    
      income from continuing operations, net of taxes
         -3,520,000 -8,806,000   470,000 246,000            
      income from discontinued operations, net of taxes
         -110,250 -173,000   -11,000 95,000            
      net income per common share - basic:
                          
      net income per common share
         -210 -570 -270  10 30 50       30 50  -20 
      net income per common share - diluted:
                          
      number of common shares used in computing net income per share:
                          
      basic
         3,673.75 15,803 14,593 13,676 38 13,568 13,297 13,264 13,234  754 11,353  54,991    
      diluted
         3,673.75 15,803 14,593 13,676 -10 13,979 13,447 13,264 13,234  768 11,353  55,124    
      (loss) income from operations
           -5,035,000               
      (loss) income from continuing operations before taxes
           -4,946,000               
      (loss) income from continuing operations, net of taxes
           -3,785,000               
      number of common shares used in computing net loss per share:
                          
      basic
         3,673.75 15,803 14,593 13,676 38 13,568 13,297 13,264 13,234  754 11,353  54,991    
      diluted
         3,673.75 15,803 14,593 13,676 -10 13,979 13,447 13,264 13,234  768 11,353  55,124    
      gain on extinguishment of debt
                          
      income (loss) from continuing operations before taxes
               1,003,000        2,794,000  -832,000 
      income (loss) from continuing operations, net of taxes
               824,000           
      net loss attributable to non-controlling interest
                          
      net income attributable to perma-fix environmental services, inc. common stockholders
               664,000           
      net income per common share attributable to perma-fix environmental services, inc. stockholders - basic:
                          
      net income per common share attributable to perma-fix environmental services, inc. stockholders - diluted:
                          
      net loss attributable to perma-fix environmental services, inc. common stockholders
                 -1,343,000  -1,149,000 -808,000      
      net loss per common share attributable to perma-fix environmental services, inc. stockholders - basic and diluted:
                          
      impairment loss on goodwill
                   287,250       
      loss on debt modification
                   -16,250 -65,000      
      net income attributable to non-controlling interest
                   -16,000       
      net loss per common share attributable to perma-fix environmental services, inc. stockholders - basic:
                          
      net loss per common share attributable to perma-fix environmental services, inc. stockholders - diluted:
                          
      loss (gain) on disposal of property and equipment
                         -20,000 
      income from continuing operations
                      1,515,000    
      (loss) income from discontinued operations, net of taxes
                      -69,000 -7,000   
      net income applicable to common stockholders
                      1,446,000 2,622,000   
      net income per common share – basic
                          
      net income per common share – diluted
                          
      asset impairment recovery
                          
      (gain) loss on disposal of property and equipment
                       -3,000   
      income (loss) from operations
                       3,205,000  -633,000 
      income (loss) from continuing operations
                       2,629,000  -958,000 
      gain on disposal of discontinued operations, net of taxes
                          
      disposal of discontinued operations
                          
      number of common shares used in computing
                          
      net income per share
                          
      basic
                       54,281   
      diluted
                       54,954   
      preferred stock dividends
                          
      net income applicable to common stock
                         -1,084,000 
      number of shares used in computing net income per share:
                          
      basic
                         52,063 
      diluted
                         52,063 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2013-09-30 2012-12-31 2009-09-30 2007-12-31 2007-03-31 
                          
        assets
                          
        current assets:
                          
        cash
      6,664,000 11,768,000 16,412,000 22,594,000 25,745,000 28,975,000 10,567,000 18,122,000 2,374,000 7,500,000 1,988,000 1,858,000 163,000 3,925,000 4,440,000 92,000 4,368,000 73,000 102,000 982,000 
        accounts receivable
      9,215,000 11,228,000 11,887,000 8,559,000 9,311,000 11,579,000 8,741,000 6,423,000 8,701,000 9,722,000 15,342,000 9,993,000 12,956,000 10,322,000 11,372,000 12,240,000 11,395,000    
        unbilled receivables
      8,001,000 8,781,000 8,396,000 6,287,000 5,168,000 4,990,000 7,277,000 7,076,000 8,797,000 8,432,000 9,336,000 6,306,000 6,348,000 5,275,000 8,995,000    10,321,000  
        inventories
      1,913,000 1,563,000 1,113,000 1,400,000 1,321,000 1,350,000 1,135,000 965,000 1,071,000 1,155,000 1,030,000 1,057,000 1,013,000 953,000 680,000 456,000 473,000 335,000 233,000 1,067,000 
        prepaid and other assets
      3,577,000 2,971,000 4,421,000 3,277,000 3,843,000 3,309,000 4,346,000 2,860,000 3,955,000 3,738,000 4,506,000 6,209,000 3,184,000 4,077,000 4,472,000 3,208,000 3,282,000 3,315,000   
        current assets related to discontinued operations
      61,000 60,000 37,000 33,000 36,000 20,000 12,000 5,000 13,000 13,000 15,000 17,000 17,000 27,000 15,000 3,794,000 499,000 74,000   
        total current assets
      29,431,000 36,371,000 42,266,000 42,150,000 45,424,000 50,223,000 32,078,000 35,451,000 24,911,000 30,560,000 32,217,000 25,440,000 23,681,000 24,579,000 29,974,000 30,750,000 30,447,000 31,873,000 32,594,000 32,810,000 
        property and equipment:
                          
        buildings and land
      24,672,000 24,672,000 24,680,000 24,680,000 24,744,000 24,717,000 24,764,000 24,319,000 24,319,000 24,311,000 24,103,000 24,048,000 23,281,000 20,642,000 20,631,000 26,323,000 26,297,000 26,718,000 20,748,000 20,614,000 
        equipment
      27,953,000 27,365,000 24,251,000 24,170,000 23,903,000 23,499,000 23,578,000 23,293,000 22,930,000 22,809,000 22,345,000 22,956,000 22,933,000 22,531,000 22,131,000 34,839,000 34,657,000 31,561,000 31,140,000 31,436,000 
        vehicles
      411,000 411,000 411,000 411,000 411,000 411,000 423,000 434,000 434,000 434,000 434,000 439,000 439,000 449,000 443,000 661,000 661,000 650,000 141,000 4,780,000 
        leasehold improvements
      8,000 8,000 8,000 8,000 8,000 8,000 8,000 8,000 8,000 8,000 8,000 23,000 23,000 23,000 23,000 11,625,000 11,625,000 11,455,000 11,457,000 11,474,000 
        office furniture and equipment
      1,076,000 1,076,000 1,113,000 1,113,000 1,115,000 1,082,000 1,139,000 1,138,000 1,140,000 1,130,000 1,129,000 1,320,000 1,318,000 1,316,000 1,316,000 2,107,000 2,116,000 1,929,000 2,268,000 2,513,000 
        construction-in-progress
      4,284,000 3,998,000 4,880,000 3,762,000 3,166,000 2,949,000 2,170,000 1,201,000 1,158,000 1,010,000 1,193,000 600,000 580,000 2,849,000 2,997,000 484,000 334,000 2,003,000 1,639,000 6,470,000 
        total property and equipment
      58,404,000 57,530,000 55,343,000 54,144,000 53,347,000 52,666,000 52,082,000 50,393,000 49,989,000 49,702,000 49,212,000 49,386,000 48,574,000 47,810,000 47,541,000      
        less accumulated depreciation
      -33,403,000 -32,930,000 -32,697,000 -32,291,000 -31,952,000 -31,533,000 -31,689,000 -31,314,000 -31,099,000 -30,693,000 -30,519,000 -29,871,000 -29,583,000 -29,167,000 -28,932,000      
        net property and equipment
      25,001,000 24,600,000 22,646,000 21,853,000 21,395,000 21,133,000 20,393,000 19,079,000 18,890,000 19,009,000 18,693,000 19,515,000 18,991,000 18,643,000 18,609,000 32,370,000 35,314,000 47,029,000 47,309,000 46,621,000 
        property and equipment related to discontinued operations
      146,000 146,000 146,000 130,000 130,000 130,000 130,000 130,000 81,000 81,000 81,000 81,000 81,000 81,000 81,000 1,493,000 1,614,000 651,000 6,775,000  
        operating lease right-of-use assets
      1,406,000 1,445,000 1,443,000 1,529,000 1,614,000 1,697,000 1,778,000 2,278,000 1,885,000 1,990,000 2,094,000 2,087,000 2,202,000 2,347,000 2,460,000      
        intangibles and other long term assets:
                          
        permits
      10,750,000 10,722,000 10,627,000 10,602,000 10,575,000 10,531,000 10,453,000 10,391,000 9,973,000 9,905,000 9,646,000 9,558,000 9,493,000 9,486,000 9,476,000 16,759,000 16,799,000 17,286,000 15,636,000 13,444,000 
        other intangible assets - net
      423,000 362,000 358,000 368,000 386,000 393,000 420,000 436,000 442,000 461,000 477,000 719,000 814,000 852,000 894,000  3,610,000    
        finite risk sinking fund
      13,341,000 13,216,000 13,084,000 12,952,000 12,824,000 12,680,000 12,525,000 12,372,000 12,222,000 12,074,000 11,926,000 11,540,000 11,511,000 11,482,000 11,471,000 21,299,000 21,272,000 15,457,000 6,034,000 5,566,000 
        other assets
      1,193,000 1,172,000 585,000 624,000 505,000 461,000 381,000 339,000 351,000 370,000 383,000 448,000 442,000 443,000 809,000 1,437,000 1,549,000 2,429,000 2,496,000 1,825,000 
        total assets
      81,691,000 88,034,000 91,155,000 90,208,000 92,853,000 97,248,000 78,158,000 86,971,000 74,039,000 78,749,000 79,504,000 73,189,000 71,148,000 72,176,000 77,301,000 135,376,000 141,031,000 129,675,000 126,031,000 106,123,000 
        liabilities and stockholders’ equity
                          
        current liabilities:
                          
        accounts payable
      6,793,000 7,007,000 6,369,000 5,204,000 6,542,000 6,373,000 7,675,000 9,111,000 7,979,000 9,582,000 9,614,000 10,370,000 10,725,000 10,329,000 11,975,000 5,319,000 8,657,000 5,423,000 5,010,000 4,995,000 
        accrued expenses
      5,833,000 5,222,000 6,484,000 4,600,000 4,908,000 5,111,000 6,320,000 4,207,000 6,238,000 6,560,000 6,922,000 6,436,000 4,514,000 5,537,000 5,078,000 6,214,000 6,254,000 7,564,000 9,207,000 11,044,000 
        disposal/transportation accrual
      2,505,000 1,744,000 1,941,000 2,473,000 1,949,000 2,271,000 1,811,000 1,926,000 1,515,000 1,198,000 1,320,000 1,291,000 1,279,000 1,162,000 1,065,000 1,350,000 2,294,000 3,129,000 6,677,000  
        deferred revenue
      6,769,000 7,007,000 7,112,000 6,982,000 5,881,000 6,711,000 5,398,000 5,818,000 7,295,000 6,815,000 7,765,000 3,145,000 3,574,000 2,707,000 5,580,000      
        accrued closure costs - current
      27,000 27,000 5,000 15,000 50,000 50,000 40,000 20,000 85,000 79,000 94,000 712,000 425,000 547,000 578,000      
        current portion of long-term debt
      574,000 562,000 536,000 538,000 541,000 550,000 554,000 546,000 673,000   469,000 489,000 384,000 393,000 2,486,000 2,794,000 3,064,000 15,292,000 2,421,000 
        current portion of operating lease liabilities
      483,000 416,000 372,000 372,000 365,000 345,000 320,000 378,000 346,000 380,000 412,000 431,000 421,000 416,000 406,000      
        current portion of finance lease liabilities
      310,000 313,000 227,000 264,000 298,000 285,000 285,000 286,000 287,000 291,000 223,000 154,000 219,000 354,000 333,000      
        current liabilities related to discontinued operations
      243,000 270,000 827,000 221,000 258,000 244,000 251,000 376,000 238,000 269,000 239,000 927,000 914,000 802,000 506,000 4,999,000 1,512,000 1,188,000 8,359,000  
        total current liabilities
      23,537,000 22,568,000 23,873,000 20,669,000 20,792,000 21,940,000 22,654,000 22,668,000 24,656,000 25,947,000 27,469,000 23,935,000 22,560,000 22,238,000 25,914,000 26,271,000 27,140,000 29,179,000 49,748,000 23,750,000 
        accrued closure costs
      8,833,000 8,698,000 8,616,000 8,545,000 8,431,000 8,290,000 8,201,000 8,111,000 8,015,000 8,051,000 7,972,000 7,306,000 7,136,000 6,706,000 6,613,000 11,463,000 11,349,000 12,136,000 8,739,000 5,432,000 
        long-term debt, less current portion
      1,206,000 1,310,000 1,352,000 1,485,000 1,621,000 1,765,000 1,910,000 1,695,000 1,873,000 1,975,000 2,115,000 681,000 806,000 491,000 600,000 13,135,000 11,402,000 17,794,000 2,724,000 5,948,000 
        long-term operating lease liabilities, less current portion
      995,000 1,102,000 1,149,000 1,238,000 1,333,000 1,427,000 1,521,000 1,956,000 1,594,000 1,670,000 1,744,000 1,673,000 1,784,000 1,921,000 2,029,000      
        long-term finance lease liabilities, less current portion
      541,000 619,000 483,000 497,000 540,000 491,000 564,000 636,000 706,000 776,000 423,000 357,000 394,000 920,000 884,000      
        long-term liabilities related to discontinued operations
      3,600,000 3,598,000 320,000 948,000 948,000 945,000 942,000 940,000 955,000 953,000 950,000 267,000 265,000 408,000 677,000 1,494,000 1,829,000 1,040,000 3,590,000  
        total long-term liabilities
      15,175,000 15,327,000 11,920,000 12,713,000 12,873,000 12,918,000 13,138,000 13,338,000 13,143,000 13,425,000 13,204,000 10,284,000 10,385,000 10,446,000 10,803,000 28,245,000 25,254,000 31,928,000 16,270,000 17,558,000 
        total liabilities
      38,712,000 37,895,000 35,793,000 33,382,000 33,665,000 34,858,000 35,792,000 36,006,000 37,799,000 39,372,000 40,673,000 34,219,000 32,945,000 32,684,000 36,717,000 54,516,000 52,394,000 61,107,000 66,018,000 41,308,000 
        commitments and contingencies
                          
        stockholders’ equity:
                          
        preferred stock, .001 par value...
                          
        common stock, .001 par value...
      18,000 18,000 18,000 18,000 18,000 18,000 16,000 16,000 14,000 14,000 14,000 13,000 13,000 13,000 13,000 11,000 56,000  54,000  
        additional paid-in capital
      161,408,000 161,057,000 160,622,000 160,256,000 159,944,000 159,590,000 136,047,000 135,686,000 116,981,000 116,502,000 116,106,000 114,993,000 114,755,000 114,532,000 114,307,000 103,353,000 102,819,000 99,107,000 96,409,000 93,128,000 
        accumulated deficit
      -118,201,000 -110,714,000 -105,054,000 -103,219,000 -100,503,000 -96,930,000 -93,441,000 -84,462,000 -80,511,000 -76,951,000 -77,032,000 -75,744,000 -76,408,000 -74,963,000 -73,620,000 -23,699,000 -16,005,000 -31,878,000 -37,710,000 -29,584,000 
        accumulated other comprehensive loss
      -158,000 -134,000 -136,000 -141,000 -183,000 -200,000 -168,000 -187,000 -156,000 -100,000 -169,000 -204,000 -69,000 -2,000 -28,000 -2,000 -2,000    
        less common stock in treasury, at cost; 7,642 shares
      -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000 -88,000     
        total stockholders’ equity
      42,979,000 50,139,000 55,362,000 56,826,000 59,188,000 62,390,000 42,366,000 50,965,000 36,240,000 39,377,000 38,831,000 38,970,000 38,203,000 39,492,000 40,584,000      
        total liabilities and stockholders’ equity
      81,691,000 88,034,000 91,155,000 90,208,000 92,853,000 97,248,000 78,158,000 86,971,000 74,039,000 78,749,000 79,504,000 73,189,000 71,148,000 72,176,000 77,301,000      
        deferred tax assets
             6,495,000 5,284,000 4,299,000 3,987,000 3,801,000 3,933,000 4,263,000 3,527,000      
        current portion of long - term debt
               773,000 880,000          
        no shares issued and outstanding
                          
        13,654,201 and 13,332,398 shares issued, respectively;
                          
        13,646,559 and 13,324,756 shares outstanding, respectively
               14,000           
        deferred tax liabilities
                     1,430,000     
        other long-term liabilities
                     723,000 674,000 492,000 966,000 3,130,000 
        total perma-fix environmental services, inc. stockholders’ equity
                    40,584,000      
        non-controlling interest
                      572,000    
        restricted cash
                     35,000 35,000 55,000 35,000 65,000 
        unbilled receivables - current
                     6,770,000 8,530,000   11,578,000 
        retainage receivable
                     565,000 312,000    
        deferred tax assets - current
                     3,590,000 1,553,000    
        property and equipment: - sum
                     76,039,000 75,690,000 74,316,000 67,393,000 77,287,000 
        less accumulated depreciation and amortization
                     -43,669,000 -40,376,000 -27,287,000 -20,084,000 -30,666,000 
        goodwill
                     28,037,000 29,186,000 12,054,000 9,046,000 1,330,000 
        other intangible assets – net
                     3,166,000     
        unbilled receivables – non-current
                     65,000 137,000 2,896,000   
        liabilities and stockholders' equity
                          
        unearned revenue
                     5,393,000 3,695,000 8,624,000 4,978,000 3,637,000 
        billings in excess of costs and estimated earnings
                     510,000 1,934,000    
        preferred stock of subsidiary, 1.00 par value; 1,467,396 shares authorized, 1,284,730 shares issued and outstanding, liquidation value 1.00 per share plus accrued and unpaid dividends of 723 and 674, respectively
                     1,285,000     
        stockholders' equity:
                          
        total perma-fix environmental services, inc. stockholders' equity
                     79,575,000 86,780,000    
        total stockholders' equity
                     79,575,000 87,352,000 67,283,000 58,728,000 63,530,000 
        total liabilities and stockholders' equity
                     135,376,000 141,031,000 129,675,000 126,031,000 106,123,000 
        deferred tax asset, net of liabilities
                      1,103,000    
        preferred stock of subsidiary, 1.00 par value; 1,467,396 shares authorized, 1,284,730 shares issued and outstanding, liquidation value 1.00 per share plus accrued and unpaid dividends
                      1,285,000    
        less common stock in treasury, at cost; 38,210 shares
                      -88,000    
        accounts of 218 and 333, respectively
                       18,275,000   
        unbilled receivables – current
                       9,746,000   
        current environmental accrual
                       187,000 225,000 927,000 
        environmental accruals
                       466,000 251,000 1,686,000 
        preferred stock of subsidiary, 1.00 par value; 1,467,396 shares
                          
        authorized, 1,284,730 shares issued and outstanding, liquidation
                          
        value 1.00 per share
                       1,285,000  1,285,000 
        54,502,037 and 53,934,560 shares issued and outstanding, respectively
                       54,000   
        account receivable, net of allowance for doubtful accounts of 138 and 168
                        13,536,000  
        prepaid expenses and other assets
                        3,170,000  
        current asset related to discontinued operations
                        5,197,000  
        intangibles and other assets:
                          
        unbilled receivables - non-current
                        3,772,000  
        intangible and other assets related to discontinued operations
                        2,369,000  
        preferred stock of subsidiary, 1.00 par value; 1,467,396 shares authorized, 1,284,730 shares issued and outstanding, liquidation value 1.00 per share
                        1,285,000  
        stock subscription receivable
                        -25,000 -66,000 
        accounts of 385 and 415, respectively
                         16,333,000 
        prepaid expenses
                         2,686,000 
        other receivables
                         78,000 
        current assets of discontinued operations
                         21,000 
        property and equipment of discontinued operations
                         706,000 
        unbilled receivable – non-current
                         3,821,000 
        current liabilities of discontinued operations
                         726,000 
        long-term liabilities of discontinued operations
                         1,362,000 
        no shares issued and outstanding, respectively
                          
        52,071,244 and 52,053,744 shares issued, including 0 share held
                          
        and 988,000 shares of treasury stock retired in 2006, respectively
                         52,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2022-09-30 2022-06-30 2022-03-31 2019-12-31 2009-09-30 2007-03-31 
                        
          cash flows from operating activities:
                        
          net loss
        -7,487,000 -5,660,000 -1,835,000 -2,716,000 -3,573,000    -3,560,000    -1,343,000    
          less: loss from discontinued operations, net of taxes
        -112,000  -74,000 -133,000 -73,000  -173,000 -166,000 -102,000  -160,000 -188,000 -94,000    
          loss from continuing operations, net of taxes
        -7,375,000  -1,761,000 -2,583,000 -3,500,000    -3,458,000    -1,249,000    
          adjustments to reconcile loss from continuing operations to cash from operating activities:
                        
          depreciation and amortization
        490,000 460,000 426,000 437,000 436,000 468,000 433,000 431,000 431,000 444,000 497,000 480,000 456,000 -2,501,000 3,569,000 1,217,000 
          amortization of debt issuance costs
        21,000 21,000 21,000 22,000 20,000 18,000 18,000 17,000 12,000 13,000 16,000 15,000 13,000    
          provision for credit losses on accounts receivable
        21,000                
          issuance of common stock for services
        119,000 121,000 121,000 118,000 117,000 119,000 123,000 120,000 118,000 121,000 120,000 120,000 123,000 90,000 189,000 12,000 
          stock-based compensation
        216,000 221,000 215,000 186,000 196,000 190,000 182,000 132,000 152,000 156,000 105,000 103,000 102,000 100,000   
          gain on disposal of property and equipment
            -5,000            
          changes in operating assets and liabilities of continuing operations:
                        
          accounts receivable
        1,992,000 581,000 -3,339,000 726,000 2,248,000 -3,066,000 -2,321,000 2,279,000 1,032,000 5,631,000 2,960,000 -2,639,000 1,105,000 -5,046,000 -5,134,000 -1,120,000 
          unbilled receivables
        780,000 -385,000 -2,109,000 -1,119,000 -178,000 2,287,000 -201,000 1,721,000 -365,000 904,000 42,000 -1,073,000 3,720,000 -6,711,000 4,320,000 62,000 
          prepaid expenses, inventories and other assets
        -352,000 636,000 1,215,000 493,000 -30,000 795,000 1,109,000 834,000 334,000 546,000 -1,159,000 891,000 1,097,000 -629,000 1,052,000 1,932,000 
          accounts payable, accrued expenses, unearned revenue and other liabilities
        440,000                
          cash from continuing operations
        -3,648,000 -1,999,000 -4,539,000 -1,725,000 -2,048,000  3,272,000 -1,640,000 -4,432,000 6,293,000  -2,838,000 148,000 651,000   
          cash from discontinued operations
        -136,000    -56,000    -159,000   -225,000 -142,000 -324,000   
          cash from operating activities
        -3,784,000 -2,123,000 -4,634,000 -1,891,000 -2,104,000  -5,122,000 -1,726,000 -4,591,000   -3,063,000 6,000 327,000 -500,000  
          capital expenditures
        -859,000 -2,100,000 -523,000  -244,000   -413,000 -345,000 -1,162,000 -891,000  
          free cash flows
        -4,643,000 -4,223,000 -4,634,000 -1,891,000 -2,627,000  -5,122,000 -1,726,000 -4,835,000   -3,476,000 -339,000 -835,000 -1,391,000  
          cash flows from investing activities:
                        
          purchases of property and equipment
        -859,000 -2,100,000   -523,000 -1,181,000   -244,000 -328,000 -189,000 -413,000 -345,000 -1,162,000 -1,016,000 -1,496,000 
          proceeds from sale of property and equipment
         -5,000 28,000 5,000         
          addition to permits and other intangible assets
        -105,000 -114,000   -53,000 -98,000           
          cash from investing activities of continuing operations
        -964,000    -571,000    -244,000 -328,000  -412,000 -321,000 -625,000   
          cash from investing activities of discontinued operations
        -1,000    -15,000            
          cash from investing activities
        -965,000 -2,232,000 -1,230,000 -903,000 -586,000 -1,281,000        -504,000   
          cash flows from financing activities:
                        
          repayments of revolving credit borrowings
        -19,823,000 -20,643,000 -19,501,000 -18,859,000 -18,849,000 -20,342,000 -21,920,000 -38,079,000 -18,314,000 -26,961,000 -20,869,000 -16,051,000 -17,494,000    
          borrowing on revolving credit
        19,823,000 20,643,000 19,501,000 18,859,000 18,849,000 20,342,000 21,920,000 38,079,000 18,314,000 26,961,000 20,869,000 16,051,000 17,494,000    
          proceeds from issuance of common stock upon exercise of options
        16,000                
          principal repayments of finance lease liabilities
        -81,000  -80,000 -77,000 -71,000  -72,000 -71,000 -75,000  -103,000 -660,000 -58,000    
          principal repayments of long term debt
        -162,000 -161,000 -157,000 -156,000 -157,000 -157,000 -155,000 -261,000 -259,000 -259,000 -146,000 -119,000 -110,000 838,000 -2,073,000  
          payments of offering costs from sale of common stock completed in december 2024
            -194,000            
          payment of debt issuance costs
         1,000 -5,000 -15,000 -12,000   -14,000 -21,000    
          cash from financing activities
        -227,000    -396,000    -125,000    -189,000  6,279,000  
          effect of exchange rate changes on cash
        -3,000 -8,000 20,000   -2,000 2,000 17,000 -18,000  -1,000      
          decrease in cash and finite risk sinking fund
        -4,979,000    -3,086,000      1,724,000      
          cash and finite risk sinking fund (restricted cash) at beginning of period
        24,984,000 41,655,000  19,574,000  15,911,000    
          cash and finite risk sinking fund (restricted cash) at end of period
        20,005,000 -4,512,000 -6,050,000 -3,023,000 38,569,000  -7,402,000 15,898,000 14,596,000  1,724,000 -3,733,000 15,407,000    
          supplemental disclosure:
                        
          interest paid, net of capitalized amount of 34 and 0, respectively
        62,000                
          income taxes paid
             3,000    6,000 135,000 261,000  
          non-cash investing and financing activities:
                        
          equipment purchase subject to finance lease
            132,000      114,000    
          advance for equipment purchase subject to financing
        47,000                
          less: loss on discontinued operations
                        
          loss from continuing operations
                        
          adjustments to reconcile net loss from continuing operations to cash from operating activities:
                        
          deferred tax expense
             148,000 6,417,000          
          loss on disposal of property and equipment
         3,000 4,000   20,000         
          cash used in discontinued operations
         -124,000 -95,000   -129,000 -223,000        -679,000  
          cash used in discontined operations
                        
          proceeds from sale of common stock in may and december of 2024, net of offering costs paid
                        
          payment of offering costs from sale of common stock completed in december 2024
         -1,000              
          principal repayment of finance lease liabilities
                        
          proceeds from issuance of common stock upon exercise of options/warrant
         93,000 30,000 8,000 41,000 28,000 46,000 9,000 209,000        
          cash from financing activities of continuing operations
         -149,000 -206,000   23,150,000 -322,000   -194,000 -250,000   -677,000 6,279,000  
          increase in cash and finite risk sinking fund
         -4,512,000 -6,050,000   18,563,000 -7,402,000 15,898,000 -4,978,000 5,660,000   -504,000    
          interest paid, net of capitalized amount
                        
          equipment purchase subject to finance leases
         302,000 30,000              
          equipment purchase subject to financing
                        
          provision for (recovery of) credit losses on accounts receivable
          11,000 26,000 20,000     -11,000       
          changes in operating assets and liabilities of continuing operations
                        
          accounts payable, accrued expenses and deferred revenue
                        
          proceeds from sale of common stock completed in may 2024, net of offering costs paid
                        
          interest paid
          126,000 117,000 112,000 129,000 122,000 110,000 117,000 136,000 46,000 45,000 34,000 -118,000  191,000 
          non-cash financing activities:
                        
          equipment/property purchase subject to finance
                        
          deferred tax benefit
                -956,000    -673,000    
          accounts payable, accrued expenses and unearned revenue
           -30,000 -1,372,000 -862,000 -1,856,000 -2,228,000 -1,721,000 -1,510,000 -1,231,000 170,000 -4,492,000 5,060,000 -8,460,000  
          purchases of property and equipment, net of financed amount
                        
          additions to permits and other intangible assets
                        
          equipment purchase subject to finance
               44,000        
          adjustments to reconcile loss from continuing operations to cash from operating activities :
                        
          net income
             -3,489,000 -8,979,000   81,000 664,000    3,921,000 -1,084,000 
          income from continuing operations
                      3,861,000  
          adjustments to reconcile net income from continuing operations to cash from operating activities:
                        
          cash (used in) provided by continuing operations
             -3,175,000           
          cash (used in) provided by operating activities
                        
          proceeds from long term debt
                       
          proceeds from sale of common stock, net of offering costs paid
             23,364,000 -141,000          
          cash and finite risk sinking fund
                        
          income from continuing operations, net of taxes
                        
          adjustments to reconcile income from continuing operations to cash from operating activities:
                        
          (recovery of) provision for credit losses on accounts receivable
              3,000          
          (loss) income from continuing operations, net of taxes
                        
          cash used in continuing operations
                        
          cash used in investing activities
                        
          adjustments to reconcile loss from continuing operations to cash (used in) provided by operating activities :
                        
          recovery of credit losses on accounts receivable
                -11,000        
          income income from continuing operations
                        
          adjustments to reconcile net income income from continuing operations to cash from operating activities:
                        
          cash from (used in) operating activities
                        
          offering costs paid from sale of common stock in 2021
                        
          interest on finance lease with purchase option
                        
          gain on extinguishment of debt
                        
          (recovery of) provision for bad debt reserves
                        
          cash used in operating activities
                        
          cash used in investing activities of continuing operations
                      -5,846,000  
          proceeds from capital line
                       
          proceeds from stock subscription, net of offering costs paid
                        
          adjustments to reconcile income from continuing operations to cash (used in) provided by operating activities:
                        
          recovery of bad debt reserves
                   5,000 -55,000    
          loss on disposal of plant, property, and equipment
                    1,000    
          proceeds from sale of plant, property, and equipment
                    24,000    
          loss on deconsolidation of subsidiary
                        
          loss on extinguishment of debt
                        
          amortization of debt issuance/debt discount costs
                        
          provision for (recovery of) bad debt reserves
                        
          deconsolidation of subsidiary - cash
                        
          cash provided by investing activities of discontinued operations
                        
          proceeds from issuance of long-term debt
                     -500,000   
          cash provided by financing activities of continuing operations
                        
          less: loss on discontinued operations, net of taxes of 0
                        
          provision for bad debt reserves
                        
          gain on exchange offer of series b preferred stock of subsidiary
                        
          proceeds from finance leases
                        
          purchase of equipment through finance lease obligation
                        
          common stock issued in exchange offer of series b preferred stock of subsidiary
                        
          issuance of common stock with debt
                        
          issuance of warrant with debt
                        
          loss on discontinued operations
                        
          adjustments to reconcile net income to cash from operations:
                        
          amortization of debt discount
                        
          amortization of fair value of customer contracts
                        
          provision for bad debt and other reserves
                      274,000  
          impairment loss on goodwill
                        
          loss on disposal of plant, property and equipment
                        
          foreign exchange gain
                        
          changes in operating assets and liabilities of continuing operations, net of effect from business acquisitions:
                        
          change in restricted cash
                        
          proceeds from sale of plant, property and equipment
                      16,000 28,000 
          non-controlling distribution/redemption
                        
          payment to finite risk sinking fund
                      -4,112,000  
          net borrowing of revolving credit
                        
          proceeds from finite risk financing
                      753,000  
          payment of finite risk financing
                        
          principal repayments of long term debt for discontinued operations
                        
          decrease in cash
                      -56,000 -881,000 
          cash at beginning of period
                      129,000 1,863,000 
          cash at end of period
                      73,000 982,000 
          issuance of common stock for debt
                      476,000  
          issuance of warrants for debt
                      190,000  
          less: income on discontinued operations
                      60,000  
          adjustments to reconcile net income from continuing operations to cash from operations:
                        
          changes in operating assets and liabilities of continuing operations, net of effect of business acquisitions:
                        
          payments to finite risk sinking fund
                        
          payment of earn-out to nuvotec shareholders
                      -734,000  
          cash from acquisition consideration, net of cash acquired
                        
          net cash from investing activities
                      -5,835,000 -2,516,000 
          net repayments of revolving credit
                        
          proceeds from issuance of stock
                      481,000 25,000 
          principal repayment of long-term debt for discontinued operations
                        
          increase in cash
                        
          long-term debt incurred for purchase of property and equipment
                      125,000 428,000 
          note issued for earn-out to nuvotec shareholders
                        
          warrant extension for debt modification
                        
          note issued in connection with sec acquisition
                        
          amount held in escrow account in connection with sec acquisition
                        
          asset impairment recovery
                        
          non-cash financing costs
                      133,000  
          (gain) loss on disposal of plant, property and equipment
                      -15,000  
          share based compensation
                      390,000 111,000 
          changes in operating assets and liabilities of continuing operations, net of
                        
          effect from business acquisitions:
                        
          cash provided by continuing operations
                      179,000  
          cash used for acquisition considerations, net of cash acquired
                        
          proceeds from sale of discontinued operations
                        
          cash provided by discontinued operations
                      11,000  
          net borrowing (repayments) of revolving credit
                      4,136,000  
          proceeds from issuance of long term debt
                      2,982,000  
          repayment of stock subscription receivable
                       13,000 
          interest paid, net of amounts capitalized
                      3,832,000  
          provision (benefit) for bad debt and other reserves
                        
          loss on disposal or impairment of plant, property and equipment
                        
          cash provided by operating activities
                        
          change in finite risk sinking fund
                       -1,048,000 
          cash used for acquisition consideration, net of cash acquired
                        
          net borrowings (repayments) of revolving credit
                        
          (decrease) increase in cash
                        
          interest rate swap valuation
                        
          adjustments to reconcile net income to cash from
                        
          operations:
                        
          provision (credit) for bad debt and other reserves
                       42,000 
          (gain) loss on disposal of property and equipment
                       -20,000 
          discontinued operations
                       -20,000 
          changes in operating assets and liabilities of continuing operatons:
                        
          accounts payable, accrued expenses, and unearned revenue
                       853,000 
          net cash from operations
                       1,985,000 
          net borrowings of revolving credit
                        
          principal repayments of long-term debt
                       -388,000 
          net cash from financing activities
                       -350,000