Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues	$ 7,287	$ 5,535
Costs and expenses:
Cost of sales	4,482	3,245
Selling, general and administrative	3,245	3,054
Research and development	218	220
Costs and Expenses	7,945	6,519
Operating loss	(658)	(984)
Interest expense	(5)	(5)
Interest income	339	1
Other expense, net	(90)	(10)
Loss before income taxes	(414)	(998)
Income tax expense	0	0
Net loss	$ (414)	$ (998)
Net loss per common share:
Basic net loss per common share (in dollars per share)	$ (0.01)	$ (0.03)
Diluted net loss per common share (in dollars per share)	$ (0.01)	$ (0.03)
Weighted-average number of common shares outstanding:
Basic (in shares)	30,296,000	30,267,000
Diluted (in shares)	30,296,000	30,267,000