Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (1,400,000)	$ 688,000
Reconciliation of net income (loss) to cash provided by (used in) operating activities:
Depreciation and amortization expense	829,000	764,000
Amortization of debt issuance costs	11,000	11,000
Compensation costs - stock options	1,000	1,000
Provision for doubtful accounts	2,000	(5,000)
Gain from disposal of equipment	0	(3,000)
Gain on debt extinguishment	0	(1,087,000)
Change in operating assets and liabilities:
Accounts receivable	(806,000)	(1,939,000)
Unbilled membership dues receivable	(182,000)	(116,000)
Inventories	(253,000)	(228,000)
Prepaid expenses	(184,000)	(163,000)
Other assets, net	62,000	30,000
Accounts payable	(582,000)	1,155,000
Accrued payroll and other compensation	464,000	293,000
Accrued income taxes	7,000	24,000
Other accrued taxes	(67,000)	(39,000)
Deferred membership dues revenue	1,580,000	926,000
Other liabilities and accrued expenses	116,000	(49,000)
Net cash provided by (used in) operating activities	(402,000)	263,000
Cash flows from investing activities:
Capital expenditures	(1,284,000)	(668,000)
Proceeds from disposal of equipment	0	3,000
Net cash used in investing activities	(1,284,000)	(665,000)
Cash flows from financing activities:
Principal payments on term loan facilities	(287,000)	(273,000)
Principal payments on finance lease obligations	(13,000)	(14,000)
Net cash used in financing activities	(158,000)	(287,000)
Decrease in cash, cash equivalents and restricted cash	(1,844,000)	(689,000)
Cash, cash equivalents and restricted cash at beginning of period	4,950,000	8,095,000
Cash, cash equivalents and restricted cash at end of period	3,106,000	7,406,000
Significant non-cash operating and investing activities:
Capital expenditures included in accounts payable	614,000	192,000
Significant non-cash investing and financing activities:
Operating lease right-of-use assets in exchange for lease obligations	31,000	37,000
Cash paid during the period for interest	264,000	296,000
Cash paid during the period for income taxes	13,000	19,000
Paycheck Protection Program CARES Act [Member]
Significant non-cash operating and financing activities:
Interest forgiven from Paycheck Protection Program loans	0	8,000
Subsidiaries [Member]
Cash flows from financing activities:
Proceeds from subsidiary private placement offering	$ 142,000	$ 0