Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 394,000	$ 87,000
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	1,212,000	1,231,000
Amortization of debt issuance costs	18,000	0
Non cash lease expense	83,000	74,000
Deferred income taxes	123,000	(16,000)
Stock-based compensation expense	87,000	107,000
Interest expense associated with lease liabilities	9,000	12,000
Changes in operating assets and liabilities:
Receivables	(575,000)	(497,000)
Prepaid expenses and other assets	567,000	551,000
Asset retirement obligations	(457,000)	0
Accounts payable, accrued liabilities and deferred revenue	(1,102,000)	1,294,000
Income taxes	0	26,000
Lease liabilities	(100,000)	(86,000)
Net cash provided by operating activities	259,000	2,783,000
Investing activities:
Payment for purchase of property and equipment	(66,000)	(1,065,000)
Net cash used in investing activities	(66,000)	(1,065,000)
Financing activities:
Principal payments on long-term debt	(55,000)	(276,000)
Principal payments on finance leases	0	(638,000)
Principal payments on short-term financing	0	(116,000)
Net cash used in financing activities	(55,000)	(1,030,000)
Net change in cash, cash equivalents, and restricted cash	138,000	688,000
Cash, cash equivalents, and restricted cash at beginning of period	8,263,000	4,325,000
Cash, cash equivalents, and restricted cash at end of period	8,401,000	5,013,000
Supplemental cash flow disclosure:
Interest	130,000	260,000
Income taxes paid (refunded)	$ 55,000	$ (4,000)