Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales		$ 1,055	$ 1,480	$ 1,985	$ 3,541
Cost of sales		876	1,371	1,789	3,458
Gross profit		179	109	196	83
Operating expenses:
Product development		147	353	301	856
Selling, general, and administrative		1,132	1,964	2,198	4,091
Total operating expenses		1,279	2,317	2,499	4,947
Loss from operations		(1,100)	(2,208)	(2,303)	(4,864)
Other expenses (income):
Interest expense, net		69	260	192	444
Other income		(16)	0	(16)	(30)
Other expenses		14	18	21	29
Net loss		$ (1,167)	$ (2,486)	$ (2,500)	$ (5,307)
Net loss per common share - basic and diluted
Net loss, basic (USD per share)		$ (0.42)	$ (2.43)	$ (0.98)	$ (5.45)
Net loss, diluted (USD per share)		$ (0.42)	$ (2.43)	$ (0.98)	$ (5.45)
Weighted average shares of common stock outstanding:
Basic (in shares)	[1]	2,766	1,024	2,539	973
Diluted (in shares)	[1]	2,766	1,024	2,539	973

[1] * Shares outstanding for prior periods have been restated for the 1-for-7 reverse stock split effective June 16, 2023.