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Fair Value Measurements - Financial Instruments Measured at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Liabilities    
Conversion option liability $ 8,091 $ 8,783
Corporate bonds    
Assets    
Debt securities 116,616 82,086
Preferred stock    
Assets    
Preferred stock 14,446 21,603
Recurring    
Assets    
Debt securities   103,689
Marketable securities 132,121  
Liabilities    
Total liabilities 32,376 54,834
Recurring | U.S. treasury securities    
Assets    
Debt securities 1,059 0
Recurring | Corporate bonds    
Assets    
Debt securities 116,616 82,086
Preferred stock   21,603
Recurring | Preferred stock    
Assets    
Preferred stock 14,446  
Recurring | Warrant liabilities    
Liabilities    
Warrant liabilities 24,285 46,051
Recurring | Conversion option liability    
Liabilities    
Conversion option liability 8,091 8,783
Recurring | Level 1    
Assets    
Debt securities   0
Marketable securities 1,059  
Liabilities    
Total liabilities 5,469 20,818
Recurring | Level 1 | U.S. treasury securities    
Assets    
Debt securities 1,059 0
Recurring | Level 1 | Corporate bonds    
Assets    
Debt securities 0 0
Preferred stock   0
Recurring | Level 1 | Preferred stock    
Assets    
Preferred stock 0  
Recurring | Level 1 | Warrant liabilities    
Liabilities    
Warrant liabilities 5,469 20,818
Recurring | Level 1 | Conversion option liability    
Liabilities    
Conversion option liability 0 0
Recurring | Level 2    
Assets    
Debt securities   103,689
Marketable securities 131,062  
Liabilities    
Total liabilities 0 0
Recurring | Level 2 | U.S. treasury securities    
Assets    
Debt securities 0 0
Recurring | Level 2 | Corporate bonds    
Assets    
Debt securities 116,616 82,086
Preferred stock   21,603
Recurring | Level 2 | Preferred stock    
Assets    
Preferred stock 14,446  
Recurring | Level 2 | Warrant liabilities    
Liabilities    
Warrant liabilities 0 0
Recurring | Level 2 | Conversion option liability    
Liabilities    
Conversion option liability 0 0
Recurring | Level 3    
Assets    
Debt securities   0
Marketable securities 0  
Liabilities    
Total liabilities 26,907 34,016
Recurring | Level 3 | U.S. treasury securities    
Assets    
Debt securities 0 0
Recurring | Level 3 | Corporate bonds    
Assets    
Debt securities 0 0
Preferred stock   0
Recurring | Level 3 | Preferred stock    
Assets    
Preferred stock 0  
Recurring | Level 3 | Warrant liabilities    
Liabilities    
Warrant liabilities 18,816 25,233
Recurring | Level 3 | Conversion option liability    
Liabilities    
Conversion option liability $ 8,091 $ 8,783