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Fair Value Measurements - Fair Value Recognition - Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Embedded derivatives        
Reconciliation of the beginning and ending balances of assets measured at fair value using significant unobservable inputs (Level 3)        
Beginning balance $ 1,520 $ 4,436 $ 2,621 $ 4,628
Total gain (loss) (319) (1,416) (1,420) (1,608)
Ending balance 1,201 3,020 1,201 3,020
Change in unrealized gain (loss) included in earnings (319) (1,416) (1,420) (1,608)
Convertible promissory notes        
Reconciliation of the beginning and ending balances of assets measured at fair value using significant unobservable inputs (Level 3)        
Beginning balance 2,809 5,460 2,372 2,330
Settlements, net (2,210)   (2,210)  
Total gain (loss) 3 198 111 145
Purchases 1,009 2,212 3,946 7,939
Equity method investment loss (1,087) (1,850) (3,695) (4,394)
Ending balance 524 6,020 524 6,020
Change in unrealized gain (loss) included in earnings 313   313  
Change in unrealized gain (loss) included in other comprehensive income (loss) $ 3 $ 198 $ 111 $ 145