Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues	$ 5,558	$ 7,042	$ 11,940	$ 11,999
Costs and expenses:
Cost of sales	3,029	4,090	6,452	7,018
Selling, general and administrative	3,347	3,245	6,688	6,590
Research and development	490	422	1,060	798
Costs and Expenses	6,866	7,757	14,200	14,406
Operating loss	(1,308)	(715)	(2,260)	(2,407)
Interest income	537	334	816	645
Other income (expense), net	86	(34)	20	1,639
Loss before income taxes	(685)	(415)	(1,424)	(123)
Income tax expense	(4)	(6)	(4)	(17)
Net loss	$ (689)	$ (421)	$ (1,428)	$ (140)
Net loss per common share:
Basic net loss per common share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.05)	$ (0)
Diluted net loss per common share (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.05)	$ (0)
Weighted-average number of common shares outstanding:
Basic (in shares)	30,868,000	30,482,000	30,796,000	30,434,000
Diluted (in shares)	30,868,000	30,482,000	30,796,000	30,434,000