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Convertible Senior Notes | 3 Months Ended
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Mar. 31, 2025
Convertible Senior Notes |
Convertible Senior Notes | Note 11. Convertible Senior Notes Convertible Senior Notes payable consisted of the following at March 31, 2025 and December 31, 2024 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ |  | 2025 |  | 2024 |
Principal amount of 2025 Senior Notes | ​ | $ | 14,344 | ​ | $ | 14,344 | ​
Principal amount of 2026 Senior Notes | ​ |  | 186,185 | ​ |  | 186,185 | ​
Less: unamortized debt issuance costs | ​ | ​ | (1,992) | ​ | ​ | (2,312) | ​
Total carrying value of Convertible Senior Notes, net | ​ | ​ | 198,537 | ​ | ​ | 198,217 | ​
Less: current portion of carrying value of Convertible Senior Notes, net | ​ | ​ | (14,326) | ​ | ​ | (14,298) | ​
Total carrying value of Convertible Senior Notes, net - long-term | ​ | $ | 184,211 | ​ | $ | 183,919 | ​
​ Interest expense incurred in connection with the Convertible Senior Notes consisted of the following for the three months ended March 31, 2025 and 2024 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |
​ | ​ | March 31, | ​
​ |  | 2025 |  | 2024 |
Coupon interest | ​ | $ | 457 | ​ | $ | 804 | ​
Amortization of debt issuance costs | ​ | ​ | 320 | ​ | ​ | 601 | ​
Total interest expense on Convertible Senior Notes | ​ | $ | 777 | ​ | $ | 1,405 | ​
​ The Company’s 2025 Senior Notes and 2026 Senior Notes payable of $14.3 million and $186.2 million, respectively, are due and payable in June 2025 and December 2026, respectively. See Note 12 – Convertible Senior Notes to the Company’s consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 for additional information related to the Company’s Convertible Senior Notes.

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