Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales		$ 9,865	$ 16,828
Cost of sales		8,167	11,643
Gross profit		1,698	5,185
Operating expenses:
Product development		1,891	1,415
Selling, general, and administrative		8,535	7,900
Restructuring		(21)	(60)
Total operating expenses		10,405	9,255
Loss from operations		(8,707)	(4,070)
Other expenses:
Interest expense		792	481
Gain on forgiveness of PPP loan		(801)	0
Loss on extinguishment of debt		0	276
Other income - employee retention tax credit		(876)	0
Loss from change in fair value of warrants		0	1,086
Other expenses		65	73
Loss from operations before income taxes		(7,887)	(5,986)
Benefit from income taxes		(1)	(5)
Net loss		$ (7,886)	$ (5,981)
Net loss per common share - basic and diluted:
Net loss, basic (in USD per share)		$ (1.73)	$ (1.83)
Net loss, diluted (in USD per share)		$ (1.73)	$ (1.83)
Weighted average shares of common shares outstanding:
Basic (in shares)	[1]	4,561	3,270
Diluted (in shares)	[1]	4,561	3,270

[1]       *Shares outstanding for prior periods have been restated for the 1-for-5 reverse stock split effective June 11, 2020.