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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities    
Net loss $ (2,797) $ (6,345)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization expense 900 1,589
Asset impairment charges   2,295
Amortization of deferred finance costs included in interest expense 102 26
Stock-based compensation and cost of licensee warrants 109 144
Loss from equity method investments 576 533
Change in contingent reduction in equity ownership of IM Topco, LLC (240)  
Changes in operating assets and liabilities:    
Accounts receivable 164 (149)
Inventory   8
Prepaid expenses and other current and non-current assets 12 (156)
Deferred revenue (205) (223)
Accounts payable, accrued expenses, accrued income taxes payable, and other current liabilities 27 (560)
Lease-related assets and liabilities (82) (237)
Other long-term liabilities   466
Net cash used in operating activities (1,434) (2,609)
Cash flows from investing activities    
Purchase of property and equipment (14)  
Net cash used in investing activities (14)  
Cash flows from financing activities    
Proceeds from public offering and private placement transactions, net of transaction costs   1,902
Proceeds from long-term debt 2,050  
Shares repurchased including vested restricted stock in exchange for withholding taxes (58)  
Net cash provided by financing activities 1,992 1,902
Net increase (decrease) in cash, cash equivalents, and restricted cash 544 (707)
Cash, cash equivalents, and restricted cash at beginning of year 1,993 2,998
Cash, cash equivalents, and restricted cash at end of year 2,537 2,291
Reconciliation to amounts on consolidated balance sheets:    
Cash and cash equivalents 298 1,552
Restricted cash (reported in other non-current assets) 2,239 739
Total cash, cash equivalents, and restricted cash 2,537 2,291
Supplemental disclosure of cash flow information:    
Cash paid during the period for interest $ 372 $ 119