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Indebtedness (Tables)
 12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
Long-term debt as of December 31, 2020 consisted of the following (in thousands):
December 31, 2020
Term loan$30,000 
Debt discount and issuance costs(1,256)
Long-term debt$28,744 
The net carrying amount of the liability component of the 2027 Notes was as follows (in thousands):
December 31, 2020December 31, 2019
Principal amount$200,000 $— 
Unamortized debt discount(56,080)— 
Unamortized debt issuance cost(278)— 
Net carrying amount$143,642 $— 
The net carrying amount of the equity component of the 2027 Notes was as follows (in thousands):
December 31, 2020December 31, 2019
Debt discount related to the value of conversion option$53,635 $— 
Debt issuance cost(109)— 
Net carrying amount$53,526 $— 
The following table sets forth the interest expense recognized related to the 2027 Notes (in thousands):
Years Ended December 31,
December 31, 2020December 31, 2019December 31, 2018
Contractual interest expense$6,139 $— $— 
Amortization of debt discount3,555 — — 
Amortization of debt issuance cost17 — — 
Total interest expense related to the 2027 Notes$9,711 $— $— 
Schedule of Future Minimum Principal Payments
The scheduled future minimum principal payments are as follows (in thousands):
December 31, 2020
2021— 
20225,806 
202311,613 
202411,613 
2025968 
Total$30,000