CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 3,724	$ 3,601
Cost of sales:
Cost of sales	1,955	2,051
Depreciation expense	126	136
Total cost of sales	2,081	2,187
Gross profit	1,643	1,414
Operating expenses:
Selling, general and administrative	1,712	1,666
Depreciation and amortization	26	60
Total operating expenses	1,738	1,726
Operating loss	(95)	(312)
Other (income) expense:
Interest expense, net	2	3
Other income, net	0	(2)
Gain on sale of property, plant and equipment	(1)	(54)
Total other (income) expense	1	(53)
Loss before income tax expense	(96)	(259)
Income tax expense	1	5
Net loss	$ (97)	$ (264)
Net loss per share:
Basic	$ (0.01)	$ (0.02)
Fully diluted	$ (0.01)	$ (0.02)
Weighted-average shares outstanding:
Basic	11,888	12,157
Fully diluted	11,888	12,157