Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 25,133	$ 27,081
Costs and expenses:
Cost of sales	14,510	15,425
Selling, general and administrative	13,761	12,803
Research and development	1,564	1,511
Total costs and expenses	29,835	29,739
Operating loss	(4,702)	(2,658)
Interest expense	0	(21)
Interest income	1,251	1,300
Other income (expense), net	1,585	(90)
Loss before income taxes	(1,866)	(1,469)
Income tax expense	(77)	(69)
Net loss	$ (1,943)	$ (1,538)
Net loss per common share:
Basic net loss per common share (in dollars per share)	$ (0.06)	$ (0.05)
Diluted net loss per common share (in dollars per share)	$ (0.06)	$ (0.05)
Weighted-average number of common shares outstanding:
Basic weighted-average shares (in shares)	30,572,000	30,348,000
Diluted (in shares)	30,572,000	30,348,000