CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenues, net	$ 690	$ 482	$ 1,800	$ 1,356
Cost of sales	257	167	645	657
Gross profit	433	315	1,155	699
Operating expenses:
Research and development	400	451	1,245	1,288
Selling, general and administrative	1,380	1,411	4,534	4,403
Total operating expenses	1,780	1,862	5,779	5,691
Loss from operations	(1,347)	(1,547)	(4,624)	(4,992)
Other income (expense):
Interest income	55	11	62	48
Interest expense	(6)	(6)	(17)	(15)
Miscellaneous income	0	29	0	30
Other income, net	49	34	45	63
Net loss	(1,298)	(1,513)	(4,579)	(4,929)
Comprehensive loss	$ (1,298)	$ (1,513)	$ (4,579)	$ (4,929)
Weighted average shares outstanding - basic (in shares)	4,668,009	729,400	2,619,841	586,628
Weighted average shares outstanding - diluted (in shares)	4,668,009	729,400	2,619,841	586,628
Net loss per share - basic (in dollars per share)	$ (0.28)	$ (2.07)	$ (1.75)	$ (8.40)
Net loss per share - diluted (in dollars per share)	$ (0.28)	$ (2.07)	$ (1.75)	$ (8.40)