Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash	$ 301	$ 52
Trade accounts receivable, less allowances of $58 and $26, respectively	909	445
Inventories, net	4,938	5,476
Short-term deposits	615	592
Prepaid and other current assets	226	232
Receivable for claimed ERTC	445	445
Total current assets	7,434	7,242
Property and equipment, net	68	76
Operating lease, right-of-use asset	1,111	1,180
Total assets	8,613	8,498
Current liabilities:
Accounts payable	2,177	2,204
Accrued liabilities	229	145
Accrued payroll and related benefits	235	261
Accrued sales commissions	29	76
Accrued warranty reserve	143	183
Operating lease liabilities	205	198
Credit line borrowings, net of loan origination fees	388	1,447
Related party promissory notes payable	0	814
Promissory notes payable, net of discounts and loan origination fees	1,277	2,618
Total current liabilities	4,683	7,946
Operating lease liabilities, net of current portion	975	1,029
Total liabilities	5,658	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 March 31, 2023 and December 31, 2022. Issued and outstanding: 876,447 at March 31, 2023 and December 31, 2022	0	0
Common stock, par value $0.0001 per share: Authorized: 50,000,000 shares at March 31, 2023 and December 31, 2022. Issued and outstanding: 19,243,610 at March 31, 2023 and 9,848,438 at December 31, 2022	2	1
Additional paid-in capital	153,311	148,545
Accumulated other comprehensive loss	(3)	(3)
Accumulated deficit	(150,355)	(149,020)
Total stockholders' equity (deficit)	2,955	(477)
Total liabilities and stockholders' equity (deficit)	$ 8,613	$ 8,498