Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues	$ 7,042	$ 5,461	$ 11,999	$ 12,748
Costs and expenses:
Cost of sales	4,090	3,465	7,018	7,947
Selling, general and administrative	3,245	2,915	6,590	6,160
Research and development	422	413	798	631
Costs and Expenses	7,757	6,793	14,406	14,738
Operating loss	(715)	(1,332)	(2,407)	(1,990)
Interest expense	0	(5)	0	(10)
Interest income	334	307	645	646
Other (expense) income, net	(34)	(14)	1,639	(104)
Loss before income taxes	(415)	(1,044)	(123)	(1,458)
Income tax expense	(6)	0	(17)	0
Net loss	$ (421)	$ (1,044)	$ (140)	$ (1,458)
Net loss per common share:
Basic net loss per common share (in dollars per share)	$ (0.01)	$ (0.03)	$ (0)	$ (0.05)
Diluted net loss per common share (in dollars per share)	$ (0.01)	$ (0.03)	$ (0)	$ (0.05)
Weighted-average number of common shares outstanding:
Basic (in shares)	30,482,000	30,324,000	30,434,000	30,310,000
Diluted (in shares)	30,482,000	30,324,000	30,434,000	30,310,000