CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)
Net sales	$ 6,561	$ 7,212	$ 21,190	$ 16,946
Cost of goods sold	3,041	3,101	8,995	7,774
Gross margin	3,520	4,111	12,195	9,172
Operating expenses:
Research and development	1,577	1,432	4,922	4,605
Selling, general and administrative	2,006	1,967	7,003	5,943
Total operating expenses	3,583	3,399	11,925	10,548
Operating income (loss)	(63)	712	270	(1,376)
Non-operating income (loss):
Interest income	41	9	125	11
Gain on sale of assets	0	0	0	57
Foreign currency transaction gain (loss)	(15)	307	107	378
Total non-operating income (loss)	26	316	232	446
Income (loss) before income taxes	(37)	1,028	502	(930)
Income tax (expense) benefit	(16)	(181)	(160)	(700)
Net income (loss)	$ (53)	$ 847	$ 342	$ (1,630)
Basic earnings (loss) per share	$ (0.01)	$ 0.10	$ 0.04	$ (0.19)
Diluted earnings (loss) per share	$ (0.01)	$ 0.10	$ 0.04	$ (0.19)
Weighted-average basic shares	9,020	8,816	8,914	8,715
Weighted-average diluted shares	9,020	8,859	9,065	8,715