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Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Debt |
Schedule of carrying value of Convertible Senior Notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | December 31, 2024 | ​ | ​ | December 31, 2023
​ |  | ​ | Principal Amount |  | ​ | Unamortized transaction costs |  | ​ | Net carrying value |  | ​ | Principal Amount |  | ​ | Unamortized transaction costs |  | ​ | Net carrying value
​ | ​ | ​ | (in thousands)
2025 Notes | ​ | $ | 26,500 | ​ | $ | (4) | ​ | $ | 26,496 | ​ | $ | 26,500 | ​ | $ | (102) | ​ | $ | 26,398
2027 Notes | ​ | ​ | 25,000 | ​ | ​ | (223) | ​ | ​ | 24,777 | ​ | ​ | 25,000 | ​ | ​ | (313) | ​ | ​ | 24,687
2029 Notes | ​ | ​ | 230,000 | ​ | ​ | (5,075) | ​ | ​ | 224,925 | ​ | ​ | 230,000 | ​ | ​ | (6,144) | ​ | ​ | 223,856
Net carrying value | ​ | $ | 281,500 | ​ | $ | (5,302) | ​ | $ | 276,198 | ​ | $ | 281,500 | ​ | $ | (6,559) | ​ | $ | 274,941
Schedule of interest expense related to Convertible Senior Notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | For the year ended December 31,
​ |  | ​ | 2024 | ​ | 2023 | ​ | 2022
​ |  | ​ | (in thousands)
Cash Interest Expense |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ | ​
Coupon interest expense - 2023 Notes | ​ | ​ | $ | — | ​ | $ | 23 | ​ | $ | 545
Coupon interest expense - 2025 Notes | ​ | ​ | ​ | 928 | ​ | ​ | 2,360 | ​ | ​ | 4,637
Coupon interest expense - 2027 Notes | ​ | ​ | ​ | 938 | ​ | ​ | 2,385 | ​ | ​ | 4,688
Coupon interest expense - 2029 Notes | ​ | ​ | ​ | 6,613 | ​ | ​ | 4,078 | ​ | ​ | —
Non-cash Interest Expense | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Amortization of debt discount/transaction costs- 2023 Notes | ​ | ​ |  | — | ​ |  | 4 | ​ |  | 97
Amortization of debt discount/transaction costs- 2025 Notes | ​ | ​ | ​ | 98 | ​ | ​ | 240 | ​ | ​ | 457
Amortization of debt discount/transaction costs- 2027 Notes | ​ | ​ | ​ | 90 | ​ | ​ | 220 | ​ | ​ | 408
Amortization of debt discount/transaction costs- 2029 Notes | ​ | ​ | ​ | 1,069 | ​ | ​ | 654 | ​ | ​ | —
Total Interest Expense | ​ | ​ | $ | 9,736 | ​ | $ | 9,964 | ​ | $ | 10,832

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- Definition Tabular disclosure of convertible debt instrument. Includes, but is not limited to, principal amount and amortized premium or discount. + References No definition available. + Details
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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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