Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 4,450	$ 5,095
Accounts receivable	1,193	1,727
Inventories, net	2,028	1,718
Other current assets	745	315
Total current assets	8,416	8,855
Property, plant and equipment, net	359	478
Operating lease right-of-use asset	404	510
Other assets	21	21
TOTAL ASSETS	9,200	9,864
Current liabilities
Accounts payable and accrued liabilities	3,008	1,640
Accrued compensation	561	640
Current portion of operating lease	249	238
Other current liabilities	74	41
Total current liabilities	3,892	2,559
Warrant liabilities	14,074	468
Operating lease liability	189	307
Total liabilities	18,155	3,334
Commitments and contingencies
Series J Convertible Preferred Stock as of June 30, 2025 and December 31, 2024, par value $0.0001 per share; authorized 600,000 shares, issued and outstanding 119 and 102, respectively	5	2
Stockholders’ equity (deficit)
Preferred stock	0	0
Common stock as of June 30, 2025 and December 31, 2024, par value $0.0001 per share; authorized 100,000,000 shares, issued and outstanding 527,158 and 104,142, respectively	0	0
Additional paid‑in capital	305,452	305,366
Foreign currency translation adjustment	(54)	(47)
Accumulated deficit	(314,358)	(298,791)
Total stockholders’ equity (deficit)	(8,960)	6,528
TOTAL LIABILITIES, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)	9,200	9,864
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
Series F-1 Convertible Preferred Stock [Member]
Stockholders’ equity (deficit)
Preferred stock	$ 0	$ 0