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Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Transfer of Assets From Level 1 to Level 2 $ 0 $ 0  
Transfer of Assets From Level 2 to Level 1 0 0  
Transfer of Liabilities From Level 1 to Level 2 0 0  
Transfer of Liabilities From Level 2 to Level 1 0 0  
Transfer of Assets Into Level 3 0 0  
Transfer of Assets Out of Level 3 0 0  
Transfer of Liabilities Into Level 3 0 0  
Transfer of Liabilities Out of Level 3 0 $ 0  
Convertible senior notes, fair value 135,388    
Convertible senior notes, net carrying value 140,189   $ 139,966
Term notes outstanding principal balance 650,000    
Money market funds      
Cash equivalents 2,003   45,078
Level 1 | Money market funds      
Cash equivalents $ 2,003   $ 45,078