Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 930	$ 2,061
Cost of sales	913	2,087
Gross profit (loss)	17	(26)
Operating expenses:
Product development	154	503
Selling, general, and administrative	1,066	2,127
Total operating expenses	1,220	2,630
Loss from operations	(1,203)	(2,656)
Other expenses (income):
Interest expense	123	184
Other income	0	(30)
Other expenses	7	11
Net loss	$ (1,333)	$ (2,821)
Net loss per common share - basic and diluted
Net loss, basic (USD per share)	$ (0.08)	$ (0.44)
Net loss, diluted (USD per share)	$ (0.08)	$ (0.44)
Weighted average shares of common stock outstanding:
Basic (in shares)	16,172	6,437
Diluted (in shares)	16,172	6,437