Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 1,023	$ 3,800
Accounts receivable	1,292	1,951
Inventories, net	1,967	1,997
Other current assets	544	461
Total current assets	4,826	8,209
Property, plant and equipment, net	630	728
Operating lease right-of-use asset	613	713
Other assets	120	120
TOTAL ASSETS	6,189	9,770
Current liabilities
Accounts payable and accrued liabilities	3,028	2,380
Accrued compensation	706	525
Current portion of operating lease liability	226	216
Other current liabilities	56	51
Total current liabilities	4,016	3,172
Common stock warrant liability	8,579	2,843
Operating lease liability	428	544
Total liabilities	13,023	6,559
Commitments and contingencies
Mezzanine Equity
Series J Convertible Preferred Stock as of June 30, 2024 and December 31, 2023, par value $0.0001 per share; authorized 600,000 shares, issued and outstanding 88 and 11,950, respectively	2	221
Stockholders' equity (deficit)
Preferred stock	0	0
Common stock as of June 30, 2024 and December 31, 2023, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 515,744 and 162,356, respectively	0	0
Additional paid-in capital	292,887	290,647
Accumulated other comprehensive income:
Foreign currency translation adjustment	(42)	(31)
Accumulated deficit	(299,681)	(287,626)
Total stockholders' equity (deficit)	(6,836)	2,990
TOTAL LIABILITIES, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT)	6,189	9,770
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity (deficit)
Preferred stock	0	0
Series F Convertible Preferred Stock [Member]
Stockholders' equity (deficit)
Preferred stock	$ 0	$ 0