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Debt (Tables)
 9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Schedule of outstanding debt obligations and interest expense related to convertible debt
Outstanding debt obligations as of September 30, 2021 were as follows (in thousands):
MaturitiesInterest Rates as of September 30, 2021September 30, 2021December 31, 2020
Convertible senior notesMay 20251.50%$595,059 $568,744 
Non-revolving Loan (1)
2022 - 2024
2.60% - 5.25%
86,208 103,305 
Master Vehicle Loan (1)
2021 - 2024
2.60% - 6.75%
30,743 7,947 
Total long-term debt, including current maturities$712,010 $679,996 
Less: long-term debt maturing within one year(49,553)(35,760)
Total long-term debt$662,457 $644,236 
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(1)These loans were acquired as part of the Flexdrive acquisition on February 7, 2020.
The following table sets forth the primary components of interest expense as reported on the condensed consolidated statements of operations (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Contractual interest expense related to the 2025 Notes$(2,803)$(2,803)$(8,409)$(4,205)
Amortization of debt discount and issuance costs(9,078)(8,381)(26,317)(12,501)
Interest expense related to vehicle loans(1,212)(1,345)(3,784)(3,867)
Interest expense$(13,093)$(12,529)$(38,510)$(20,573)
Schedule of convertible notes
The net carrying amounts of the liability component of the 2025 Notes were as follows (in thousands):
September 30, 2021
Principal$747,498 
Unamortized debt discount and debt issuance costs(152,439)
Net carrying amount of liability component$595,059 
Schedule of maturities of long-term debt outstanding
Maturities of long-term debt outstanding, including current maturities, as of September 30, 2021 were as follows (in thousands):
Remainder of 2021$10,638 
202257,047 
202329,076 
202420,190 
2025595,059 
Thereafter— 
Total long-term debt outstanding$712,010