Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 24,261	$ 22,550
Costs and expenses:
Cost of sales	12,363	11,912
Selling, general and administrative	12,055	13,600
Research and development	1,332	1,177
Intangible assets abandonment	0	197
Total Costs and expenses	25,750	26,886
Operating loss	(1,489)	(4,336)
Interest expense	(13)	(4)
Other income, net	1,570	119
Income (loss) before income taxes	68	(4,221)
Income tax expense	(14)	(57)
Net income (loss)	$ 54	$ (4,278)
Net income (loss) per common share:
Basic net income (loss) per common share (in dollars per share)	$ 0.00	$ (0.17)
Diluted net income (loss) per common share (in dollars per share)	$ 0.00	$ (0.17)
Weighted-average number of common shares outstanding:
Basic weighted-average shares (in shares)	29,585,000	24,691,000
Diluted (in shares)	29,694,000	24,691,000