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Description of the Business (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 21, 2024
USD ($)
Jun. 13, 2024
Mar. 07, 2024
USD ($)
Feb. 28, 2024
Feb. 21, 2024
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
segment
Sep. 30, 2023
USD ($)
Nov. 22, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 03, 2021
USD ($)
Description of the Business [Line Items]                          
Number of reportable segments | segment                 1        
Net loss             $ (2,134) $ 13,932 $ 41,008 $ 78,029      
Net loss from continuing operations             (1,968) $ 12,049 31,084 63,920      
Net cash flow from continuing operations                 16,124 2,363      
Cash used in operating activities from continuing operations                 7,372 $ (2,052)      
Cash and cash equivalents             53,723   53,723     $ 35,637  
Accumulated deficit             652,895   652,895     611,768  
Unsecured convertible notes due 2026                          
Description of the Business [Line Items]                          
Aggregate principal amount                         $ 150,000
Convertible Notes                          
Description of the Business [Line Items]                          
Aggregate principal amount           $ 150,000              
Repayments of long-term debt $ 300   $ 30,900   $ 30,900                
Principal outstanding         $ 150,000   $ 118,767   $ 118,767     $ 150,000  
Repurchase price as percentage of par plus accrued and unpaid interest           101.00%              
Percentage of net proceeds from future asset sales   0.95   0.95                  
Convertible Notes | Forecast                          
Description of the Business [Line Items]                          
Principal outstanding                     $ 118,800    
Interest payable                     $ 4,700    
CM Partners, LLC                          
Description of the Business [Line Items]                          
Percentage of membership interests acquired                         100.00%