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Debt (Tables)
9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Summary of Long-Term Debt
As of September 30, 2022 and December 31, 2021, long-term debt consisted of the following (in thousands):
September 30, 2022December 31, 2021
2026 Notes2025 NotesTotal2026 Notes2025 NotesTotal
Outstanding principal balance$212,750 $150,000 $362,750 $212,750 $150,000 $362,750 
Less: Debt issuance costs(4,157)(3,526)(7,683)(4,915)(4,271)(9,186)
Carrying amount, long-term debt$208,593 $146,474 $355,067 $207,835 $145,729 $353,564 
Summary of Total Interest Expense
The following tables set forth the total interest expense recognized related to the term loans and the convertible notes for the three and nine months ended September 30, 2022 and 2021 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Cash interest expense$2,274 $2,274 $6,801 $7,511 
Payment in kind interest— — — 2,178 
Amortization of debt discount
— — — 1,750 
Amortization of debt issuance costs529 511 1,504 1,671 
Total interest expense$2,803 $2,785 $8,305 $13,110 
Summary of Contractual Cash Obligations and Rights
The following table summarizes the Company's contractual obligation to settle commitments related to the 2026 Notes and 2025 Notes as of September 30, 2022 (in thousands):
Payments due by Year
Total20222023202420252026Thereafter
Convertible Senior Notes Due 2026$212,750 $— $— $— $— $212,750 $— 
Interest obligations on 2026 Notes (1)
6,384 — 1,596 1,596 1,596 1,596 — 
Convertible Senior Notes Due 2025150,000 — — — 150,000 — — 
Interest obligations on 2025 Notes (1)
26,250 3,750 7,500 7,500 7,500 — — 
(1) The 2026 Notes and 2025 Notes bear interest at a fixed rate of 0.750% and 5.000% per year, respectively.