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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Operating activities:        
Net (loss) income $ (177,000) $ 540,000 $ (77,000) $ 934,000
Adjustments to reconcile net (loss) income to net cash from operating activities:        
Depreciation, amortization, and other     2,609,000 2,375,000
Loss on write down of impaired assets and associated removal costs 578,000 0 578,000 0
Accretion of debt issuance costs 19,000 19,000 37,000 37,000
Non cash lease expense     171,000 168,000
Deferred income taxes     0 319,000
Stock-based compensation expense     193,000 159,000
Interest expense associated with lease liabilities     5,000 18,000
Changes in operating assets and liabilities:        
Receivables     (1,187,000) 718,000
Prepaid expenses and other assets     1,230,000 1,261,000
Asset retirement obligations, related party     578,000 (457,000)
Related party liabilities     656,000 (792,000)
Accounts payable, accrued liabilities, and deferred revenue     627,000 (446,000)
Lease liabilities     (206,000) (202,000)
Net cash provided by operating activities     5,214,000 4,092,000
Investing activities:        
Payment for purchase of property and equipment     (2,561,000) (96,000)
Net cash used in investing activities     (2,561,000) (96,000)
Financing activities:        
Principal payments on long-term debt     (1,160,000) (297,000)
Principal payments on short-term financing     (152,000) 0
Proceeds from options exercised     0 5,000
Net cash used in financing activities     (1,312,000) (292,000)
Net change in cash, cash equivalents, and restricted cash     1,341,000 3,704,000
Cash, cash equivalents, and restricted cash at beginning of period     12,453,000 8,263,000
Cash, cash equivalents, and restricted cash at end of period 13,794,000 11,967,000 13,794,000 11,967,000
Supplemental cash flow disclosure        
Interest     507,000 260,000
Income taxes     229,000 156,000
Detail of cash, cash equivalents and restricted cash at end of period        
Cash and cash equivalents 13,676,000 11,849,000 13,676,000 11,849,000
Restricted cash 118,000 118,000 118,000 118,000
Cash, cash equivalents, and restricted cash at end of period $ 13,794,000 $ 11,967,000 $ 13,794,000 $ 11,967,000