Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income (loss)	$ (171,000)	$ (2,003,000)
Reconciliation of net income (loss) to cash provided by operating activities:
Depreciation and amortization expense	1,982,000	1,895,000
Amortization of debt issuance costs	30,000	25,000
Compensation costs - stock options	0	1,000
Provision for losses on accounts receivable	15,000	10,000
Gain on disposal of equipment	(7,000)	0
Change in operating assets and liabilities:
Accounts receivable	(2,041,000)	36,000
Unbilled membership dues receivable	(543,000)	(484,000)
Inventories	(213,000)	(369,000)
Prepaid expenses	235,000	126,000
Other assets, net	(1,000)	91,000
Accounts payable	1,354,000	595,000
Accrued payroll and other compensation	491,000	182,000
Accrued taxes	(121,000)	(45,000)
Deferred membership dues revenue	2,420,000	2,094,000
Other liabilities and accrued expenses	180,000	347,000
Net cash provided by operating activities	3,610,000	2,501,000
Cash flows from investing activities:
Capital expenditures	(703,000)	(2,210,000)
Proceeds from disposal of equipment	7,000	0
Net cash used in investing activities	(696,000)	(2,210,000)
Cash flows from financing activities:
Borrowings under line of credit facility	0	650,000
Principal payments on term loan facilities	(294,000)	(277,000)
Principal payments on finance lease obligations	(81,000)	(47,000)
Net cash used in financing activities	(375,000)	326,000
Increase in cash, cash equivalents and restricted cash	2,539,000	617,000
Cash, cash equivalents and restricted cash at beginning of period	11,452,000	12,050,000
Cash, cash equivalents and restricted cash at end of period	13,991,000	12,667,000
Significant non-cash operating and investing activities:
Capital expenditures included in accounts payable	15,000	24,000
us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract
Operating lease right-of-use assets in exchange for lease obligations	0	47,000
Finance lease obligation incurred	111,000	154,000
Cash paid during the period for interest	1,114,000	1,008,000
Cash paid during the period for income taxes	$ 0	$ 66,000