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Convertible Notes and Term Loan - 2026 Convertible Notes Components (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Apr. 30, 2020
Debt Instrument      
Total 2026 Convertible Notes $ 223,341 $ 223,029 [1]  
2026 Convertible Notes | Senior subordinated notes      
Debt Instrument      
Principal amount of the Convertible Notes 230,000 230,000 $ 230,000
Unamortized debt discount and debt issuance costs (6,659) (6,971)  
Total 2026 Convertible Notes 223,341 223,029  
Remaining unamortized debt discount and debt offering costs $ 6,659 $ 6,971  
[1] The consolidated balance sheet as of December 31, 2020 has been derived from the audited consolidated balance sheet included in the Companys 2020 Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 25, 2021.