CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 28,064	$ 24,217
Cost of goods sold	11,878	11,007
Gross margin	16,186	13,210
Operating expenses:
Research and development	6,524	6,083
Selling, general and administrative	9,214	7,876
Total operating expenses	15,738	13,959
Operating income (loss)	448	(749)
Non-operating income (loss):
Interest income	190	34
Gain on sale of assets	0	57
Foreign currency transaction gain (loss)	42	221
Total non-operating income (loss)	232	312
Income (loss) before income taxes	680	(437)
Income tax (expense) benefit	(194)	(683)
Net income (loss)	$ 486	$ (1,120)
Basic earnings (loss) per share	$ 0.05	$ (0.13)
Diluted earnings (loss) per share	$ 0.05	$ (0.13)
Weighted-average basic shares	8,941	8,741
Weighted-average diluted shares	9,073	8,741