CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	$ 17,233	$ 12,977
Cost of sales:
Cost of sales	10,733	7,232
Depreciation expense	663	830
Total cost of sales	11,396	8,062
Gross profit	5,837	4,915
Operating expenses:
Selling, general and administrative	5,892	6,210
Depreciation and amortization	288	252
Asset impairment	0	4,490
Total operating expenses	6,180	10,952
Operating loss	(343)	(6,037)
Other (income) expense:
Interest expense, net	12	7
Other income, net	(2,869)	0
Loss on sale of property, plant and equipment	76	0
Total other (income) expense	(2,781)	7
Income (loss) before income tax expense	2,438	(6,044)
Income tax expense	112	13
Net income (loss)	$ 2,326	$ (6,057)
Net income (loss) per share:
Basic	$ 0.19	$ (0.48)
Fully diluted	$ 0.19	$ (0.48)
Weighted-average shares outstanding:
Basic	12,389	12,495
Fully diluted	12,454	12,495