Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales		$ 5,717	$ 5,968
Cost of sales		5,494	6,286
Gross profit (loss)		223	(318)
Operating expenses:
Product development		587	1,491
Selling, general, and administrative		3,607	7,148
Loss on impairment		0	338
Total operating expenses		4,194	8,977
Loss from operations		(3,971)	(9,295)
Other expenses (income):
Interest income		(57)	0
Interest expense		380	954
Other income		(30)	(30)
Other expenses		26	56
Loss from operations before income taxes		(4,290)	(10,275)
Provision for income taxes		3	4
Net loss		$ (4,293)	$ (10,279)
Net loss per common stock basic and diluted:
Net loss, basic (in dollars per share)		$ (1.32)	$ (8.88)
Net loss, diluted (in dollars per share)		$ (1.32)	$ (8.88)
Weighted average shares of common stock outstanding:
Basic (in shares)	[1]	3,241	1,158
Diluted (in shares)	[1]	3,241	1,158

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