Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Product sales	$ 8,180	$ 7,176
Revenue, Product and Service [Extensible Enumeration]	us-gaap:ProductMember	us-gaap:ProductMember
Operating expenses:
Cost of sales	$ 3,269	$ 2,935
General and administrative	3,357	4,084
Selling and marketing	1,245	1,383
Research and development	492	695
Total operating expenses	8,363	9,097
Loss from operations	(183)	(1,921)
Other income (expense):
Gain on forgiveness of debt		1,137
Interest expense	(135)	(128)
Other income, net	(13)	13
Total other income (expense), net	(148)	1,022
Net loss	$ (331)	$ (899)
Net loss per common share, basic	$ (0.04)	$ (0.11)
Net loss per common share, diluted	$ (0.04)	$ (0.11)
Weighted-average common shares used to compute net loss per share, basic	8,004	7,833
Weighted-average common shares used to compute net loss per share, diluted	8,004	7,833