CONDENSED 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
Statements of Operations [Abstract]
Net sales	$ 2,748	$ 2,512	$ 7,387	$ 6,973
Cost of goods sold	1,290	1,247	3,617	3,581
Gross profit	1,458	1,265	3,770	3,392
Operating expenses
Selling and marketing	434	340	1,295	1,044
General and administrative	606	517	1,768	1,621
Research and development	237	235	697	761
Total operating expenses	1,277	1,092	3,760	3,426
Operating income (loss)	181	173	10	(34)
Non-operating income
Interest expense	0	0	(6)	0
Interest income	91	117	267	342
Total non-operating income, net	91	117	261	342
Income before income tax expense	272	290	271	308
Income tax expense	64	52	68	63
Net income	$ 208	$ 238	$ 203	$ 245
Basic
Net income per share	$ 0.06	$ 0.07	$ 0.06	$ 0.07
Weighted average shares	3,462,564	3,428,021	3,453,585	3,428,021
Diluted
Net income per share	$ 0.06	$ 0.07	$ 0.06	$ 0.07
Weighted average shares	3,473,921	3,434,417	3,453,585	3,440,382