Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net income (loss)	$ 228,000	$ (721,000)
Adjustments to reconcile net income (loss) to net cash from operating activities (excluding assets acquired and liabilities assumed):
Depreciation and amortization	3,750,000	5,209,000
Amortization of debt issuance costs	39,000	0
Loss on extinguishment of debt	401,000	0
Non cash lease expense	226,000	215,000
Deferred income taxes	(46,000)	(192,000)
Stock-based compensation expense	312,000	189,000
Interest expense associated with lease liabilities	32,000	52,000
Changes in operating assets and liabilities:
Receivables	(529,000)	2,242,000
Prepaid expenses and other assets	39,000	687,000
Asset retirement obligations	(618,000)	0
Accounts payable, accrued liabilities and deferred revenue	(222,000)	784,000
Income taxes	(211,000)	(141,000)
Lease liabilities	(258,000)	(267,000)
Net cash provided by operating activities	3,143,000	8,057,000
Investing activities:
Payment for purchase of property and equipment	(347,000)	(328,000)
Payment for acquisition, net of cash acquired	0	(2,084,000)
Proceeds from sale of equipment	0	150,000
Net cash used in investing activities	(347,000)	(2,262,000)
Financing activities:
Principal payments on long-term debt	(3,497,000)	(1,386,000)
Principal payments on finance leases	(8,919,000)	(2,559,000)
Principal payments on short-term financing	(471,000)	(459,000)
Distributions to non-controlling interests	(242,000)	(582,000)
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	(325,000)	(30,000)
Proceeds from options exercised	5,000	0
Net cash provided by (used in) financing activities	47,000	(3,591,000)
Net change in cash, cash equivalents, and restricted cash	2,843,000	2,204,000
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	7,168,000	3,983,000
Supplemental cash flow disclosure:
Interest	587,000	803,000
Income taxes paid	597,000	335,000
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	97,000
Acquisition of equipment with long-term debt financing	1,103,000	1,184,000
Acquisition of equipment with finance leases	0	369,000
Acquisition of insurance with short-term financing	0	45,000
First working capital payment related to acquisition, withholding taxes	0	43,000
Estimated subsequent working capital payment for acquisition	$ 0	$ 354,000