Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales		$ 1,339	$ 1,764	$ 3,324	$ 5,305
Cost of sales		1,387	1,927	3,176	5,385
Gross (loss) profit		(48)	(163)	148	(80)
Operating expenses:
Product development		142	366	443	1,222
Selling, general, and administrative		713	1,802	2,911	5,893
Loss on write-off of fixed assets		0	76	0	76
Total operating expenses		855	2,244	3,354	7,191
Loss from operations		(903)	(2,407)	(3,206)	(7,271)
Other expenses (income):
Interest expense, net		34	235	226	679
Other income		0	0	(16)	(30)
Other expenses		7	20	28	49
Net loss		$ (944)	$ (2,662)	$ (3,444)	$ (7,969)
Net loss per common share - basic and diluted
Net loss, basic (USD per share)		$ (0.27)	$ (2.03)	$ (1.20)	$ (7.33)
Net loss, diluted (USD per share)		$ (0.27)	$ (2.03)	$ (1.20)	$ (7.33)
Weighted average shares of common stock outstanding:
Basic (in shares)	[1]	3,514	1,313	2,868	1,087
Diluted (in shares)	[1]	3,514	1,313	2,868	1,087

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