CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 1,143	$ 1,553	$ 1,759	$ 2,386
Cost of sales	996	1,427	1,418	2,140
Gross profit	147	126	341	246
Operating expenses:
Product development	74	140	124	268
Selling, general, and administrative	297	543	709	1,134
Total operating expenses	371	683	833	1,402
Loss from operations	(224)	(557)	(492)	(1,156)
Other expenses (income):
Interest expense	0	0	0	5
Interest income	(1)	0	(1)	0
Gain on debt extinguishment	0	0	0	(187)
Other income	0	(4)	0	(4)
Other expenses	8	1	8	2
Net loss	$ (231)	$ (554)	$ (499)	$ (972)
Net loss per common share - basic and diluted
Net loss, basic (in dollars per share)	$ (0.04)	$ (0.12)	$ (0.09)	$ (0.21)
Net loss, diluted (in dollars per share)	$ (0.04)	$ (0.12)	$ (0.09)	$ (0.21)
Weighted average shares of common stock outstanding:
Basic (in shares)	5,379	4,785	5,323	4,609
Diluted (in shares)	5,379	4,785	5,323	4,609