Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net loss	$ (1,739)	$ (111)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property and equipment	13	30
Amortization of intangible assets	38	91
Non-cash gain on changes in fair value of warrant liability	(0)	(2,056)
Non-cash gain on changes in fair value of contingent liability	0	(219)
Changes in operating assets and liabilities:
Accounts receivable	138	(632)
Inventory	(360)	(565)
Prepaid expenses and other current assets	44	26
Operating lease right-of-use assets	87	(1,920)
Other assets	3	(8)
Accounts payable and accrued liabilities	153	1,182
Operating lease liabilities	(63)	1,941
Net cash used in operating activities	(1,611)	(2,057)
Investing activities:
Purchases of property and equipment	(13)	(24)
Net cash used in investing activities	(13)	(24)
Financing activities:
Payment on the line of credit	0	(105)
Net cash used in financing activities	0	(105)
Net change in cash, cash equivalents, and restricted cash	(1,624)	(2,186)
Cash, cash equivalents and restricted cash, beginning of year	5,846	7,979
Cash, cash equivalents and restricted cash, end of period	4,222	5,793
Supplemental disclosure of cash flow information:
Interest paid	5	4
Warrant liability transferred to equity	0	7,502
Addition of operating lease, right-of-use asset	0	2,039
Conversion of Series B Preferred Stock		0
Employees and Directors [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense related to employee and director stock awards	75	184
Conversion of Series B Preferred Stock to Common Stock [Member]
Supplemental disclosure of cash flow information:
Conversion of Series B Preferred Stock	$ 0	$ 71