Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows From Operating Activities:
Net income	$ 2,718,000	$ 6,156,000
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	119,000	238,000
Depreciation and amortization	641,000	611,000
Equity in income of unconsolidated affiliate	(87,000)	(623,000)
Operating lease expense, net of accretion	689,000	663,000
Changes in operating assets and liabilities:
Accounts receivable, net	(2,680,000)	4,141,000
Accounts receivable, related party	161,000	(491,000)
Inventories	(155,000)	(6,441,000)
Prepaid expenses	2,374,000	(337,000)
Accounts payable and accrued liabilities	(759,000)	(2,627,000)
Customer advance payments of orders	0	(209,000)
Lease liabilities	(690,000)	(660,000)
Net cash provided by operating activities	2,331,000	421,000
Cash Flows From Investing Activities:
Purchases of property and equipment	(349,000)	(2,391,000)
Net cash used in investing activities	(349,000)	(2,391,000)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	60,000	391,000
Repurchase of common stock	(2,832,000)	(4,077,000)
Net cash used in financing activities	(2,772,000)	(3,686,000)
Decrease in cash	(790,000)	(5,656,000)
Cash, beginning of the period	16,307,000	23,292,000
Cash, end of the period	$ 15,517,000	$ 17,636,000