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Convertible Senior Notes, Net - Amounts Recorded in Interest Expense Related to Notes (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
2025 Convertible Senior Notes  
Debt Disclosure [Line Items]  
Contractual interest expense $ 1,294
Amortization of debt discount 871
Amortization of debt issuance costs 263
Total interest and amortization expense 2,428
2028 Convertible Senior Notes  
Debt Disclosure [Line Items]  
Contractual interest expense 176
Amortization of debt discount 640
Amortization of debt issuance costs 41
Total interest and amortization expense $ 857