CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 3,499	$ 4,528	$ 7,100	$ 8,450
Cost of sales:
Cost of sales	1,901	2,938	3,951	4,949
Depreciation expense	117	184	253	367
Total cost of sales	2,018	3,122	4,204	5,316
Gross profit	1,481	1,406	2,896	3,134
Operating expenses:
Selling, general and administrative	1,419	1,752	3,087	3,287
Depreciation and amortization	56	78	116	155
Total operating expenses	1,475	1,830	3,203	3,442
Operating income (loss)	6	(424)	(307)	(308)
Other (income) expense:
Interest expense, net	3	8	5	21
Other income, net	(50)	(1,156)	(52)	(1,156)
Gain on sale of property, plant and equipment	(134)	(6)	(188)	(55)
Total other (income) expense	(181)	(1,154)	(235)	(1,190)
Income (loss) before income taxes	187	730	(72)	882
Income tax expense	10	6	15	10
Net income (loss)	$ 177	$ 724	$ (87)	$ 872
Net income (loss) per share:
Basic	$ 0.01	$ 0.06	$ (0.01)	$ 0.07
Fully diluted	$ 0.01	$ 0.06	$ (0.01)	$ 0.07
Weighted-average shares outstanding:
Basic	11,992	12,389	12,074	12,389
Fully diluted	12,057	12,444	12,136	12,438