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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Income Statement [Abstract]        
Revenue $ 28,584,000 $ 25,405,000 $ 55,831,000 $ 47,145,000
Cost of revenue, exclusive of depreciation and amortization 19,066,000 17,227,000 36,398,000 30,940,000
Operating expenses:        
Selling, general and administrative 5,918,000 7,011,000 11,971,000 14,677,000
Research and development 2,697,000 929,000 3,571,000 2,554,000
Depreciation, amortization, depletion and accretion 2,485,000 1,658,000 4,666,000 3,374,000
(Gain) loss on sale of assets (27,000) 0 118,000 0
Total operating expenses 11,073,000 9,598,000 20,326,000 20,605,000
Operating loss (1,555,000) (1,420,000) (893,000) (4,400,000)
Other (expense) income:        
Earnings from equity method investments 0 0 155,000 0
Interest expense (594,000) (829,000) (1,318,000) (1,620,000)
Other income, net 16,000 311,000 126,000 663,000
Total other expense (578,000) (518,000) (1,037,000) (957,000)
Loss before income taxes (2,133,000) (1,938,000) (1,930,000) (5,357,000)
Income tax expense 0 30,000 0 30,000
Net loss $ (2,133,000) $ (1,968,000) $ (1,930,000) $ (5,387,000)
Loss per common share (Note 1):        
Basic (in dollars per share) $ (0.05) $ (0.06) $ (0.05) $ (0.16)
Diluted (in dollars per share) $ (0.05) $ (0.06) $ (0.05) $ (0.16)
Weighted-average number of common shares outstanding:        
Basic (in shares) 41,507 34,356 41,415 33,229
Diluted (in shares) 41,507 34,356 41,415 33,229