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Convertible Senior Notes (Tables) - Convertible senior notes | 9 Months Ended
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Sep. 30, 2025
Convertible Senior Notes |
Schedule of convertible notes outstanding | As of September 30, 2025, the outstanding balance of the 2029 Convertible Notes consisted of the following: ​
​ | ​ | ​
​ | 2029 Convertible Notes
Principal | $ | 241,500
Less: unamortized issuance costs | ​ | (3,550)
Net carrying amount | $ | 237,950
Schedule of future minimum payments | As of September 30, 2025, the future minimum payments on the 2029 Convertible Notes were as follows: ​
​ | ​ | ​ | ​
Years ended December 31, | ​ | 2029 Convertible Notes
2025 | ​ | $ | —
2026 | ​ | ​ | 6,943
2027 | ​ | ​ | 6,943
2028 | ​ | ​ | 6,943
Thereafter | ​ | ​ | 244,972
Total minimum payments | ​ | $ | 265,801
Less: interest | ​ | ​ | (24,301)
Less: unamortized issuance costs | ​ | ​ | (3,550)
Convertible Notes carrying value | ​ | $ | 237,950
Schedule of total interest expense recognized related to the convertible notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2024
Contractual interest expense | $ | 1,735 | ​ | $ | 1,736 | ​ | $ | 5,207 | ​ | $ | 5,523
Amortization of debt issuance costs | ​ | 263 | ​ | ​ | 261 | ​ | ​ | 778 | ​ | ​ | 847
Total interest expense | $ | 1,998 | ​ | $ | 1,997 | ​ | $ | 5,985 | ​ | $ | 6,370
​

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