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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities:    
Net income (loss) $ 60,000 $ (507,000)
Adjustments to reconcile net income (loss) to net cash from operating activities (excluding assets acquired and liabilities assumed):    
Depreciation and amortization 2,509,000 3,347,000
Amortization of debt issuance costs 14,000 0
Loss on extinguishment of debt 401,000 0
Non cash lease expense 149,000 143,000
Deferred income taxes (64,000) (158,000)
Stock-based compensation expense 203,000 109,000
Interest expense associated with lease liabilities 22,000 39,000
Changes in operating assets and liabilities:    
Receivables 335,000 2,288,000
Prepaid expenses and other assets 1,086,000 1,206,000
Asset retirement obligations (562,000) 0
Accounts payable, accrued liabilities and deferred revenue 97,000 638,000
Income taxes (252,000) (82,000)
Lease liabilities (171,000) (182,000)
Net cash provided by operating activities 3,827,000 6,841,000
Investing activities:    
Payment for purchase of property and equipment (229,000) (242,000)
Payment for acquisition, net of cash acquired 0 (1,568,000)
Net cash used in investing activities (229,000) (1,810,000)
Financing activities:    
Principal payments on long-term debt (3,254,000) (1,062,000)
Principal payments on finance leases (8,919,000) (1,981,000)
Principal payments on short-term financing (294,000) (343,000)
Distributions to non-controlling interests (204,000) (440,000)
Proceeds from long-term debt financing, net of property and equipment acquired 13,897,000 0
Proceeds from financing for acquisition 0 1,425,000
Prepayment penalties (401,000) 0
Debt issuance costs long-term debt (316,000) 0
Proceeds from options exercised 5,000 0
Net cash provided by (used in) financing activities 514,000 (2,401,000)
Net change in cash, cash equivalents, and restricted cash 4,112,000 2,630,000
Cash, cash equivalents, and restricted cash at beginning of period 4,325,000 1,779,000
Cash, cash equivalents, and restricted cash at end of period 8,437,000 4,409,000
Supplemental cash flow disclosure:    
Interest 425,000 549,000
Income taxes paid 557,000 71,000
Schedule of non-cash investing and financing activities    
Lease reassessment right of use assets and lease liabilities 0 67,000
Right of use assets and lease liabilities 0 135,000
Interest capitalized to property and equipment 0 65,000
Acquisition of equipment with long-term debt financing 1,103,000 1,184,000
Acquisition of insurance with short-term financing 0 45,000
First working capital payment related to acquisition, withholding taxes 0 515,000
Estimated subsequent working capital payment for acquisition $ 0 $ 354,000