Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 1,764	$ 2,749	$ 5,305	$ 7,460
Cost of sales	1,927	2,186	5,385	5,951
Gross (loss) profit	(163)	563	(80)	1,509
Operating expenses:
Product development	366	404	1,222	1,427
Selling, general, and administrative	1,802	1,968	5,893	6,454
Loss on write-off of fixed assets	76	0	76	0
Restructuring expense (recovery)	0	1	0	(21)
Total operating expenses	2,244	2,373	7,191	7,860
Loss from operations	(2,407)	(1,810)	(7,271)	(6,351)
Other expenses (income):
Interest expense	235	177	679	520
Gain on forgiveness of Paycheck Protection Program loan	0	0	0	(801)
Other income	0	(862)	(30)	(862)
Other expenses	20	15	49	47
Net loss	$ (2,662)	$ (1,140)	$ (7,969)	$ (5,255)
Net loss per common share - basic and diluted
Net loss, basic (USD per share)	$ (0.29)	$ (0.22)	$ (1.05)	$ (1.22)
Net loss, diluted (USD per share)	$ (0.29)	$ (0.22)	$ (1.05)	$ (1.22)
Weighted average shares of common stock outstanding:
Basic weighted average common shares outstanding (in shares)	9,190	5,086	7,608	4,309
Diluted weighted average common shares outstanding (in shares)	9,190	5,086	7,608	4,309