CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 1,196	$ 1,339	$ 3,582	$ 3,324
Cost of sales	1,008	1,387	3,148	3,176
Gross profit (loss)	188	(48)	434	148
Operating expenses:
Product development	137	142	405	443
Selling, general, and administrative	449	713	1,583	2,911
Total operating expenses	586	855	1,988	3,354
Loss from operations	(398)	(903)	(1,554)	(3,206)
Other expenses (income):
Interest expense, net	0	34	5	226
Other income	(26)	0	(30)	(16)
Gain on debt extinguishment	0	0	(187)	0
Gain on partial lease termination	(63)	0	(63)	0
Other expenses	7	7	9	28
Net loss	$ (316)	$ (944)	$ (1,288)	$ (3,444)
Net loss per common share - basic and diluted
Net loss, basic (in dollars per share)	$ (0.06)	$ (0.27)	$ (0.27)	$ (1.20)
Net loss, diluted (in dollars per share)	$ (0.06)	$ (0.27)	$ (0.27)	$ (1.20)
Weighted average shares of common stock outstanding:
Basic (in shares)	5,261	3,514	4,840	2,868
Diluted (in shares)	5,261	3,514	4,840	2,868