Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 7,490	$ 7,851	$ 19,430	$ 19,850
Costs and expenses:
Cost of sales	3,829	4,444	10,281	11,462
Selling, general and administrative	3,207	3,225	9,895	9,815
Research and development	450	361	1,510	1,159
Costs and Expenses	7,486	8,030	21,686	22,436
Operating income (loss)	4	(179)	(2,256)	(2,586)
Interest income	311	323	1,127	968
Other (expense) income, net	(5)	(63)	15	1,576
Income (loss) before income taxes	310	81	(1,114)	(42)
Income tax expense	(7)	(1)	(11)	(18)
Net income (loss)	$ 303	$ 80	$ (1,125)	$ (60)
Net income (loss) per common share:
Basic net income (loss) per common share (in dollars per share)	$ 0.01	$ 0	$ (0.04)	$ (0)
Diluted net income (loss) per common share (in dollars per share)	$ 0.01	$ 0	$ (0.04)	$ (0)
Weighted-average number of common shares outstanding:
Basic (in shares)	31,074,000	30,708,000	30,890,000	30,526,000
Diluted (in shares)	31,293,000	30,848,000	30,890,000	30,526,000