Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 5,535	$ 5,033
Costs and expenses:
Cost of sales	3,245	2,675
Selling, general and administrative	3,054	3,100
Research and development	220	415
Costs and Expenses, Total	6,519	6,190
Operating loss	(984)	(1,157)
Interest expense	(5)	(4)
Interest income	1	1
Other (expense) income, net	(10)	1,558
(Loss) income before income taxes	(998)	398
Income tax expense	0	0
Net (loss) income	$ (998)	$ 398
Net (loss) income per common share:
Basic net (loss) income per common share (in dollars per share)	$ (0.03)	$ 0.01
Diluted net (loss) income per common share (in dollars per share)	$ (0.03)	$ 0.01
Weighted-average number of common shares outstanding:
Basic (in shares)	30,267,000	27,510,000
Diluted (in shares)	30,267,000	27,737,000