Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 4,957	$ 7,287
Costs and expenses:
Cost of sales	2,928	4,482
Selling, general and administrative	3,345	3,245
Research and development	376	218
Costs and Expenses	6,649	7,945
Operating loss	(1,692)	(658)
Interest expense	0	(5)
Interest income	311	339
Other income (expense), net	1,673	(90)
Income (loss) before income taxes	292	(414)
Income tax expense	(11)	0
Net income (loss)	$ 281	$ (414)
Net income (loss) per common share:
Basic net income (loss) per common share (in dollars per share)	$ 0.01	$ (0.01)
Diluted net income (loss) per common share (in dollars per share)	$ 0.01	$ (0.01)
Weighted-average number of common shares outstanding:
Basic (in shares)	30,385,000	30,296,000
Diluted (in shares)	30,756,000	30,296,000