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Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Liabilities    
Conversion option liabilities $ 0 $ 5
Corporate bonds    
Assets    
Debt securities 3,385 25,033
Preferred stock    
Assets    
Preferred stock 1,595 7,361
Recurring    
Assets    
Marketable securities 7,421 32,852
Liabilities    
Total liabilities 1,361 1,191
Recurring | U.S. treasury securities    
Assets    
Debt securities 2,356 67
Recurring | Corporate bonds    
Assets    
Debt securities 3,450 25,378
Recurring | Preferred stock    
Assets    
Preferred stock 1,615 7,407
Recurring | Warrant liabilities    
Liabilities    
Warrant liabilities 1,361 1,186
Recurring | Conversion option liabilities    
Liabilities    
Conversion option liabilities   5
Recurring | Level 1    
Assets    
Marketable securities 2,356 67
Liabilities    
Total liabilities 238 201
Recurring | Level 1 | U.S. treasury securities    
Assets    
Debt securities 2,356 67
Recurring | Level 1 | Corporate bonds    
Assets    
Debt securities 0 0
Recurring | Level 1 | Preferred stock    
Assets    
Preferred stock 0 0
Recurring | Level 1 | Warrant liabilities    
Liabilities    
Warrant liabilities 238 201
Recurring | Level 1 | Conversion option liabilities    
Liabilities    
Conversion option liabilities   0
Recurring | Level 2    
Assets    
Marketable securities 5,065 32,785
Liabilities    
Total liabilities 8 30
Recurring | Level 2 | U.S. treasury securities    
Assets    
Debt securities 0 0
Recurring | Level 2 | Corporate bonds    
Assets    
Debt securities 3,450 25,378
Recurring | Level 2 | Preferred stock    
Assets    
Preferred stock 1,615 7,407
Recurring | Level 2 | Warrant liabilities    
Liabilities    
Warrant liabilities 8 30
Recurring | Level 2 | Conversion option liabilities    
Liabilities    
Conversion option liabilities   0
Recurring | Level 3    
Assets    
Marketable securities 0 0
Liabilities    
Total liabilities 1,115 960
Recurring | Level 3 | U.S. treasury securities    
Assets    
Debt securities 0 0
Recurring | Level 3 | Corporate bonds    
Assets    
Debt securities 0 0
Recurring | Level 3 | Preferred stock    
Assets    
Preferred stock 0 0
Recurring | Level 3 | Warrant liabilities    
Liabilities    
Warrant liabilities $ 1,115 955
Recurring | Level 3 | Conversion option liabilities    
Liabilities    
Conversion option liabilities   $ 5