Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows From Operating Activities:
Net income	$ 552,000	$ 1,522,000
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation	22,000	55,000
Depreciation and amortization	243,000	212,000
Equity in income of unconsolidated affiliate	(109,000)	(49,000)
Operating lease expense, net of accretion	237,000	228,000
Changes in operating assets and liabilities:
Accounts receivable, net	(3,024,000)	(3,814,000)
Accounts receivable, related party	865,000	(214,000)
Inventories	303,000	1,086,000
Prepaid expenses	190,000	736,000
Accounts payable and accrued liabilities	(737,000)	(714,000)
Lease liabilities	(239,000)	(227,000)
Net cash used in operating activities	(1,697,000)	(1,179,000)
Cash Flows From Investing Activities:
Purchases of property and equipment	(289,000)	(133,000)
Net cash used in investing activities	(289,000)	(133,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	350,000	0
Repurchase of common stock	(833,000)	(756,000)
Net cash used in financing activities	(483,000)	(756,000)
Decrease in cash	(2,469,000)	(2,068,000)
Cash and cash equivalents, beginning of the period	16,290,000	16,307,000
Cash and cash equivalents, end of the period	$ 13,821,000	$ 14,239,000