CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash	$ 972	$ 2,030
Inventories, net	4,397	4,439
Prepayments to vendors	516	792
Prepaid and other current assets	199	156
Total current assets	6,480	9,189
Property and equipment, net	104	112
Operating lease, right-of-use asset	833	899
Total assets	7,417	10,200
Current liabilities:
Accrued liabilities	107	110
Accrued legal and professional fees	111	64
Accrued payroll and related benefits	164	199
Accrued sales commissions	26	62
Accrued warranty reserve	116	150
Operating lease liabilities	233	223
Advanced capital contribution	0	450
Promissory notes payable, net of discounts and loan origination fees	0	1,323
Total current liabilities	3,457	6,351
Operating lease liabilities, net of current portion	735	798
Total liabilities	4,192	7,149
STOCKHOLDERS' EQUITY
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, 2024 and December 31, 2023. Issued and outstanding: 876,447 at March 31, 2024 and December 31, 2023	0	0
Common stock, par value $0.0001 per share: Authorized: 50,000,000 shares at March 31, 2024 and December 31, 2023. Issued and outstanding: 4,726,149 at March 31, 2024 and 4,348,690 at December 31, 2023	0	0
Additional paid-in capital	156,961	156,369
Accumulated other comprehensive loss	(3)	(3)
Accumulated deficit	(153,733)	(153,315)
Total stockholders' equity	3,225	3,051
Total liabilities and stockholders' equity	7,417	10,200
Nonrelated Party
Current assets:
Trade accounts receivable	396	1,570
Current liabilities:
Accounts Payable	1,389	1,624
Related Party
Current assets:
Trade accounts receivable	0	202
Current liabilities:
Accounts Payable	$ 1,311	$ 2,146