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Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Liabilities      
Marketable securities and long-term investments purchased $ 61,287 $ 110,636  
Recurring | Public Warrants      
Liabilities      
Liabilities 2,637   $ 2,505
Recurring | Private Placement Warrants      
Liabilities      
Liabilities 2,091   1,722
Recurring | Level 1 | Public Warrants      
Liabilities      
Liabilities 2,637   2,505
Recurring | Level 2 | Private Placement Warrants      
Liabilities      
Liabilities 2,091   1,722
Recurring | Level 3      
Liabilities      
Transfers in or out of Level 3 0   0
Recurring | Commercial Paper      
Assets      
Assets 95,059   84,909
Recurring | Commercial Paper | Level 1      
Assets      
Assets 95,059   84,909
Recurring | Corporate Bonds      
Assets      
Assets 223,649   239,473
Recurring | Corporate Bonds | Level 1      
Assets      
Assets 223,649   239,473
Recurring | Government Bonds      
Assets      
Assets 46,218   56,689
Recurring | Government Bonds | Level 1      
Assets      
Assets $ 46,218   $ 56,689