Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows From Operating Activities:
Net income	$ 1,698,000	$ 2,215,000
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation	44,000	87,000
Depreciation and amortization	462,000	439,000
Equity in income of unconsolidated affiliate	(212,000)	(99,000)
Operating lease expense, net of accretion	461,000	457,000
Changes in operating assets and liabilities:
Accounts receivable, net	(3,213,000)	(3,055,000)
Accounts receivable, related party	665,000	(214,000)
Inventories	2,426,000	1,812,000
Prepaid expenses	(519,000)	(175,000)
Accounts payable and accrued liabilities	(360,000)	(67,000)
Lease liabilities	(465,000)	(457,000)
Net cash used in operating activities	987,000	943,000
Cash Flows From Investing Activities:
Purchases of property and equipment	(390,000)	(222,000)
Net cash used in investing activities	(390,000)	(222,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	403,000	30,000
Repurchase of common stock	(1,930,000)	(1,716,000)
Treasury stock excise tax	(11,000)	0
Net cash used in financing activities	(1,538,000)	(1,686,000)
Decrease in cash	(941,000)	(965,000)
Cash and cash equivalents, beginning of the period	16,290,000	16,307,000
Cash and cash equivalents, end of the period	$ 15,349,000	$ 15,342,000