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Debt - (Tables) | 9 Months Ended
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Sep. 30, 2023
Debt Instrument, Redemption [Line Items] |
Summary of liability for sale of future royalties | ​
​ | ​ | ​ | ​ | ​
​ |  | Nine Months Ended September 30, | ​
Liability for sale of future royalties- (current and noncurrent) | ​ | 2023 | ​
Beginning balance as of December 31, 2022 | ​ | $ | 757,886 | ​
Less: Non-cash royalty revenue payable to RPI | ​ | ​ | (50,599) | ​
Plus: Non-cash interest expense recognized | ​ | ​ | 56,031 | ​
Ending balance | ​ | $ | 763,318 | ​
Effective interest rate as of September 30, 2023 | ​ |  | 9.3 | %
1.50% Convertible senior notes due 2026 |
Debt Instrument, Redemption [Line Items] |
Summary of convertible notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2023 | ​ | December 31, 2022 | ​
Principal | ​ | $ | 287,500 | ​ | $ | 287,500 | ​
Less: Debt issuance costs | ​ |  | (3,584) | ​ |  | (4,456) | ​
Net carrying amount | ​ | $ | 283,916 | ​ | $ | 283,044 | ​
Summary of interest expense recognized related to the Convertible Notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30, | ​
​ | ​ | 2023 | ​ | 2022 |  | 2023 | ​ | 2022 | ​
Contractual interest expense | ​ | $ | 1,080 | ​ | $ | 1,081 | ​ | $ | 3,215 | ​ | $ | 3,217 | ​
Amortization of debt issuance costs | ​ |  | 294 | ​ | ​ | 289 | ​ | ​ | 872 | ​ | ​ | 856 | ​
Total | ​ | $ | 1,374 | ​ | $ | 1,370 | ​ | $ | 4,087 | ​ | $ | 4,073 | ​
Effective interest rate | ​ |  | 1.9 | % | ​ | 1.9 | % | ​ | 1.9 | % | ​ | 1.9 | %
3.00% Convertible senior notes due 2022 |
Debt Instrument, Redemption [Line Items] |
Summary of interest expense recognized related to the Convertible Notes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ |  | ​
​ | ​ | Three Months Ended September 30, |  | Nine Months Ended September 30, |  | ​
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | ​
Contractual interest expense | ​ | $ | — | ​ | $ | 559 | ​ | $ | — | ​ | $ | 2,800 | ​ | ​
Amortization of debt issuance costs | ​ |  | — | ​ |  | 92 | ​ |  | — | ​ |  | 460 | ​ | ​
Total | ​ | $ | — | ​ | $ | 651 | ​ | $ | — | ​ | $ | 3,260 | ​ | ​
Effective interest rate | ​ |  | — | % |  | 3.5 | % |  | — | % |  | 3.5 | % | ​
​
Blackstone Credit Agreement |
Debt Instrument, Redemption [Line Items] |
Schedule of credit agreement | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2023 | ​ | December 31, 2022
Principal | ​ | $ | 300,000 | ​ | $ | 300,000
Less: Debt issuance costs | ​ |  | (10,742) | ​ |  | (11,322)
Net carrying amount | ​ | $ | 289,258 | ​ | $ | 288,678
Summary of interest expense recognized related to debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | September 30, | ​ | September 30, | ​
​ | 2023 | ​ | 2023 | ​
Contractual interest expense | $ | 9,554 | ​ | $ | 28,087 | ​
Amortization of debt issuance costs |  | 280 | ​ |  | 702 | ​
Total | $ | 9,834 | ​ | $ | 28,789 | ​
Effective interest rate | ​ | 13.1 | % | ​ | 13.1 | %

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