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Convertible Senior Notes (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Schedule of convertible debt
The interest expense recognized related to the Notes was as follows (in thousands):
Three Months Ended
March 31, 2021
(unaudited)
Contractual interest expense$1,437 
Amortization of debt issuance costs and discount2,870 
Total$4,307 
The net carrying value of the liability component of the Notes was as follows (in thousands):
March 31, 2021
(unaudited)
Principal$230,000 
Less: Unamortized debt discount(53,577)
Less: Unamortized issuance costs(4,559)
Net carrying amount$171,864 
The net carrying value of the equity component of the Notes was as follows (in thousands):
March 31, 2021
(unaudited)
Proceeds allocated to the conversion option (debt discount)$63,270 
Less: Issuance costs(2,057)
Net carrying amount$61,213