Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating Activities:
Net loss	$ (15,567)	$ (12,055)
Adjustments to reconcile net loss to cash flows used in operating activities:
Depreciation and amortization	123	151
Stock-based compensation expense	84	273
Change in fair value of warrant liabilities	(940)	(720)
Financing expense	10,553	5,607
Changes in operating assets and liabilities:
Accounts receivable	534	659
Inventory, net	(310)	30
Other current assets	(430)	(395)
Other assets and liabilities	32	5
Accounts payable and accrued expenses	1,288	829
Net cash used in operating activities	(4,633)	(5,616)
Investing Activities:
Purchases of property and equipment	(4)	(53)
Net cash used in investing activities	(4)	(53)
Financing Activities:
Issuance of common stock and warrants from offering, net	3,999	2,403
Proceeds from the exercise of Series J Convertible Preferred Warrants	0	500
Net cash provided by financing activities	3,999	2,903
Effect of exchange rate changes on cash	(7)	(11)
Net decrease in cash and cash equivalents	(645)	(2,777)
Cash and cash equivalents - beginning of period	5,095	3,800
Cash and cash equivalents - end of period	4,450	1,023
Supplemental cash flow information
Issuance of Series J Preferred Stock for exercise of Warrants	0	1,857
Deemed dividend on Series J Preferred Stock	2	(541)
Common stock offering costs included in prepaids	0	306
Series J Convertible Preferred Stock [Member]
Supplemental cash flow information
Issuance of Common Stock for conversion	0	1,535
Series F-1 Convertible Preferred Stock [Member]
Supplemental cash flow information
Issuance of Common Stock for conversion	$ 1,100	$ 0