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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net loss $ (2,433) $ (9,395)
Less: Loss from discontinued operations, net of income taxes (7) (3,237)
Net loss from continuing operations (2,426) (6,158)
Adjustments to reconcile net loss to net cash provided by (used in) continuing operating activities:    
Depreciation and amortization 409 285
Impairment of long-lived assets (Note 4) 1,261
Write-off of patents and trademarks 59
Share-based compensation 240 1,155
Other 572 525
Changes in operating assets and liabilities:    
Other assets 1,874 1,185
Prepaid and other current assets 17 (1,241)
Accounts payable 207 (1,466)
Accrued expenses and other current liabilities (315) (11,918)
Lease liabilities (755) (629)
Other non-current liabilities 69 82
Total adjustments 3,579 (11,963)
Net cash provided by (used in) continuing operating activities 1,153 (18,121)
Cash flows from financing activities:    
Proceeds from sale of common stock, net of costs 1,149
Net cash provided by continuing financing activities 0 1,149
Discontinued operations:    
Net cash used in operating activities (433) (22,179)
Net cash used in discontinued operations (433) (22,179)
Net increase (decrease) in cash 720 (39,151)
Cash and cash equivalents - continuing operations, beginning of period 4,327 49,317
Total cash and cash equivalents, end of period $ 5,047 $ 10,166