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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Operating activities:    
Net loss $ 4,455,000 $ (6,011,000)
Net income from discontinued operations, net of taxes (11,082,000) (841,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation of property and equipment 5,000 24,000
Stock-based compensation expense related to employee and director stock awards 6,000 137,000
Non-cash expense incurred to obtain consent of Secured Convertible Note holders 0 368,000
Non-cash gain on changes in fair value of warrant liability (0) (114,000)
Non-cash loss on changes in fair value of embedded derivative liability (0) 18,000
Non-cash loss on modification of warrants 0 69,000
Non-cash right-of-use asset amortization 123,000 254,000
Impairment of long-lived assets 676,000 0
Accretion of interest and amortization of debt discounts on convertible notes 84,000 871,000
Changes in operating assets and liabilities:    
Accounts receivable (368,000) 243,000
Prepaid expenses and other current assets 51,000 (33,000)
Other assets 3,000 (16,000)
Accounts payable and accrued liabilities 178,000 (525,000)
Operating lease liabilities (286,000) (265,000)
Net cash used in operating activities, continuing operations (6,155,000) (5,821,000)
Investing activities:    
Purchases of property and equipment 0 (2,000)
Net cash used in investing activities, continuing operations 0 (2,000)
Financing activities:    
Payments on Secured Convertible Notes 0 (1,991,000)
Repurchase of Series F-1 and F-3 Warrants (1,989,000) 0
Payment on Bridge Note (507,000) 0
Dividend paid (4,815,000) 0
Cash debt issuance cost 0 (115,000)
Net cash (used in) provided by financing activities, continuing operations (3,201,000) 999,000
Net decrease in cash, cash equivalents, and restricted cash, continuing operations (9,356,000) (4,824,000)
Net increase in cash and cash equivalents, discontinued operations 11,151,000 2,471,000
Net increase (decrease) in cash, cash equivalents, and restricted cash, consolidated 1,795,000 (2,353,000)
Cash, cash equivalents and restricted cash, beginning of period 907,000 3,606,000
Cash, cash equivalents and restricted cash of continuing operations, end of period 2,702,000 1,253,000
Supplemental disclosure of cash flow information:    
Interest paid 8,000 130,000
Supplemental disclosure of non-cash information:    
Deemed Capital Contribution 433,000 0
Conversions of preferred stock to common stock 0 1,944,000
Down round feature adjustments related to preferred stock 0 380,000
Warrant liabilities transferred to equity 0 242,000
Issuance of derivative liability in conjunction with Unsecured Convertible Notes 0 224,000
Underwritten Registered Direct Offering [Member]    
Financing activities:    
Proceeds from issuance of common stock and pre-funded warrants in an underwritten registered direct offering, net of issuance costs 0 2,858,000
Warrants and Pre-funded Warrants [Member]    
Financing activities:    
Proceeds from warrant exercises 851,000 247,000
Warrant Liability [Member]    
Supplemental disclosure of non-cash information:    
Warrant liabilities transferred to equity 0 312,000
Series F Preferred Stock [Member]    
Financing activities:    
Cash payment pursuant to Series F Agreements (527,000) 0
Supplemental disclosure of non-cash information:    
Issuance of Preferred Stock 1,484,000 0
Series D Preferred Stock [Member]    
Financing activities:    
Net proceeds from issuance of Series D Preferred Stock $ 3,786,000 $ 0