CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 3,508	$ 3,499	$ 7,232	$ 7,100
Cost of sales:
Cost of sales	2,233	1,901	4,189	3,951
Depreciation	127	117	253	253
Total cost of sales	2,360	2,018	4,442	4,204
Gross profit	1,148	1,481	2,790	2,896
Operating expenses:
Selling, general and administrative	1,542	1,419	3,253	3,087
Depreciation and amortization	27	56	53	116
Total operating expenses	1,569	1,475	3,306	3,203
Operating income (loss)	(421)	6	(516)	(307)
Other expense (income):
Interest expense, net	2	3	4	5
Other expense (income), net	7	(50)	7	(52)
Gain on sale of property, plant and equipment	(1)	(134)	(2)	(188)
Total other expense (income)	8	(181)	9	(235)
Income (loss) before income tax expense	(429)	187	(525)	(72)
Income tax expense	4	10	5	15
Net income (loss)	$ (433)	$ 177	$ (530)	$ (87)
Net income (loss) per share:
Basic	$ (0.04)	$ 0.01	$ (0.04)	$ (0.01)
Fully diluted	$ (0.04)	$ 0.01	$ (0.04)	$ (0.01)
Weighted-average shares outstanding:
Basic	11,888	11,992	11,888	12,074
Fully diluted	11,888	12,057	11,888	12,136