| Schedule of Debt Interest Expense |
The following is a summary of net carrying amounts and the estimated fair values of the Company’s convertible notes: | | | | | | | | | | | | | | | | | | | | | | | | | 2030 Notes | | 2031 Notes | | (in thousands) | June 30, 2026 | | December 31, 2025 | | June 30, 2026 | | December 31, 2025 | | Principal amount | $ | 410,000 | | | $ | 410,000 | | | $ | 35,000 | | | $ | 35,000 | | | Unamortized debt discount and issuance costs | $ | 11,952 | | | $ | 13,356 | | | $ | 1,419 | | | $ | 1,549 | | | Net carrying amount | $ | 398,048 | | | $ | 396,644 | | | $ | 33,581 | | | $ | 33,451 | | | Estimated fair value | $ | 610,941 | | | $ | 401,431 | | | $ | 120,876 | | | $ | 63,997 | | | Leveling | Level 2 | | Level 2 | | Level 3 | | Level 3 |
The following table presents the interest expense over the term of the Company’s convertible notes:
| | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | (in thousands) | 2026 | | 2025 | | 2026 | | 2025 | | Coupon interest expense | $ | 2,941 | | | $ | 5,528 | | | $ | 5,881 | | | $ | 11,056 | | | Amortization of debt discount and issuance costs | 780 | | | 195 | | | 1,561 | | | 389 | | | Interest expense | $ | 3,721 | | | $ | 5,723 | | | $ | 7,442 | | | $ | 11,445 | |
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