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Debt - (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Instrument, Redemption [Line Items] |
Summary of liability for sale of future royalties | The following table shows the activity within the “liability for sale of future royalties- current” and “liability for sale of future royalties- noncurrent” accounts for the year ended December 31, 2023: ​
​ | ​ | ​ | ​ | ​
​ |  | Year Ended December 31, | ​
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 | ​ | ​ | (93,460) | ​
Plus: Non-cash interest expense recognized | ​ | ​ | 104,790 | ​
Plus: Cash Consideration | ​ | ​ | 1,000,000 | ​
Plus: Loss on Debt Extinguishment | ​ | ​ | 44,881 | ​
Ending balance | ​ | $ | 1,814,097 | ​
Effective interest rate as of December 31, 2023 | ​ |  | 10.8% | ​
1.50% Convertible senior notes due 2026 |
Debt Instrument, Redemption [Line Items] |
Summary of convertible notes | The 2026 Convertible Notes consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year ended December 31,
​ | ​ | 2023 | ​ | ​ | 2022
Principal | ​ | $ | 287,500 | ​ | $ | 287,500
Less: Debt issuance costs | ​ |  | (3,287) | ​ | ​ | (4,456)
Net carrying amount | ​ | $ | 284,213 | ​ | $ | 283,044
Summary of interest expense recognized related to debt | The following table sets forth total interest expense recognized related to the 2026 Convertible Notes: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended | ​
​ | ​ | December 31, | ​
​ | ​ | 2023 | ​ | 2022 | ​
Contractual interest expense | ​ | $ | 4,305 | ​ | $ | 4,313 | ​
Amortization of debt issuance costs | ​ |  | 1,171 | ​ | ​ | 1,150 | ​
Total | ​ | $ | 5,476 | ​ | $ | 5,463 | ​
Effective interest rate | ​ |  | 1.9 | % | ​ | 1.9 | %
3.00% Convertible senior notes due 2022 |
Debt Instrument, Redemption [Line Items] |
Summary of interest expense recognized related to debt | The following table sets forth total interest expense recognized related to the 2022 Convertible Notes: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
​ | ​ | 2023 |  | 2022 |
Contractual interest expense | ​ | $ | — | ​ | $ | 2,800 | ​
Amortization of debt issuance costs | ​ |  | — | ​ |  | 460 | ​
Total | ​ | $ | — | ​ | $ | 3,260 | ​
Effective interest rate | ​ |  | — | % |  | 3.5 | %
Blackstone Credit Agreement |
Debt Instrument, Redemption [Line Items] |
Schedule of credit agreement | The Blackstone Credit Agreement consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | Year ended December 31,
​ | ​ | 2023 | ​ | ​ | 2022
Principal | ​ | $ | 300,000 | ​ | $ | 300,000
Less: Debt issuance costs | ​ |  | — | ​ | ​ | (11,322)
Repayment of senior secured term loan | ​ | ​ | (300,000) | ​ | ​ | —
Net carrying amount | ​ | $ | — | ​ | $ | 288,678
Summary of interest expense recognized related to debt | The following table sets forth total interest expense recognized related to the Blackstone Credit Agreement: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended | ​ | Year Ended | ​
​ | December 31, | ​ | December 31, | ​
​ | 2023 | ​ | 2022 | ​
Contractual interest expense | $ | 30,198 | ​ | $ | 6,069 | ​
Amortization of debt issuance costs |  | 702 | ​ | ​ | 290 | ​
Total | $ | 30,900 | ​ | $ | 6,359 | ​
Effective interest rate | ​ | 13.1 | % | ​ | 12.2 | %

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