CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 21,769	$ 28,064
Cost of goods sold	10,163	11,878
Gross margin	11,606	16,186
Operating expenses:
Research and development	6,240	6,524
Selling, general and administrative	8,404	9,214
Total operating expenses	14,644	15,738
Operating income (loss)	(3,038)	448
Non-operating income (loss):
Interest income	273	190
Foreign currency transaction gain (loss)	58	42
Total non-operating income (loss)	331	232
Income (loss) before income taxes	(2,707)	680
Income tax (expense) benefit	(386)	(194)
Net income (loss)	$ (3,093)	$ 486
Basic earnings (loss) per share	$ (0.34)	$ 0.05
Diluted earnings (loss) per share	$ (0.34)	$ 0.05
Weighted-average basic shares	9,150	8,941
Weighted-average diluted shares	9,150	9,073