Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash		$ 1,691	$ 52
Trade accounts receivable, less allowances of $76 and $26, respectively		844	445
Inventories, net		4,901	5,476
Short-term deposits		732	592
Prepaid and other current assets		189	232
Receivable for claimed Employee Retention Tax Credit		0	445
Total current assets		8,357	7,242
Property and equipment, net		79	76
Operating lease, right-of-use asset		967	1,180
Total assets		9,403	8,498
Current liabilities:
Accrued liabilities		116	145
Accrued legal and professional fees		89	0
Accrued payroll and related benefits		172	261
Accrued sales commissions		46	76
Accrued warranty reserve		147	183
Operating lease liabilities		216	198
Promissory notes payable, net of discounts and loan origination fees		1,266	2,618
Credit line borrowings, net of loan origination fees		0	1,447
Total current liabilities		4,654	7,946
Operating lease liabilities, net of current portion		857	1,029
Total liabilities		5,511	8,975
STOCKHOLDERS' EQUITY (DEFICIT)
Preferred stock, par value $0.0001 per share: Authorized: 5,000,000 shares (3,300,000 designated as Series A Convertible Preferred Stock) at September 30, 2023 and December 31, 2022 Issued and outstanding: 876,447 at September 30, 2023 and December 31, 2022		0	0
Common stock, par value $0.0001 per share: Authorized: 50,000,000 shares at September 30, 2023 and December 31, 2022 Issued and outstanding: 0 at September 30, 2023 and 1,406,920* at December 31, 2022	[1]	0	1
Additional paid-in capital		156,361	148,545
Accumulated other comprehensive loss		(3)	(3)
Accumulated deficit		(152,466)	(149,020)
Total stockholders' equity (deficit)		3,892	(477)
Total liabilities and stockholders' equity (deficit)		9,403	8,498
Nonrelated Party
Current liabilities:
Accounts payable		2,330	2,204
Related Party
Current liabilities:
Accounts payable		272	0
Related party promissory notes payable		$ 0	$ 814

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