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Debt - (Tables)

6 Months Ended

Jun. 30, 2024

Debt Instrument, Redemption [Line Items]

Summary of liability for sale of future royalties

​

​	​	​	​	​
​		Six Months Ended June 30,		​
Liability for sale of future royalties- (current and noncurrent)	​	2024		​
Beginning balance as of December 31, 2023	​	$	1,814,097	​
Less: Non-cash royalty revenue payable to Royalty Pharma	​	​	(73,349)	​
Plus: Non-cash interest expense recognized	​	​	102,340	​
Plus: Cash received from Royalty Pharma	​	​	241,792	​
Ending balance	​	$	2,084,880	​
Effective interest rate as of June 30, 2024	​		9.9%	​

1.50% Convertible senior notes due 2026

Debt Instrument, Redemption [Line Items]

Summary of convertible notes

​

​	​	​	​	​	​	​	​
​		​	​	​	​	​	​
​	​	June 30, 2024		​	December 31, 2023		​
Principal	​	$	287,500	​	$	287,500	​
Less: Debt issuance costs	​		(2,694)	​		(3,287)	​
Net carrying amount	​	$	284,806	​	$	284,213	​

Summary of interest expense recognized related to the Convertible Notes

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three Months Ended June 30,

​

​

Six Months Ended June 30,

​

​

2024

​

2023

2024

​

2023

​

Contractual interest expense

​

$

1,066

​

$

1,066

​

$

2,142

​

$

2,135

​

Amortization of debt issuance costs

​

295

​

​

290

​

​

591

​

​

578

​

Total

​

$

1,361

​

$

1,356

​

$

2,733

​

$

2,713

​

Effective interest rate

​

1.9

%

​

1.9

%

​

1.9

%

​

1.9

%

​

Blackstone Credit Agreement

Debt Instrument, Redemption [Line Items]

Schedule of credit agreement

​

​	​	​	​	​	​	​
​		June 30, 2024		​	December 31, 2023
Principal	​	$	—	​	$	300,000
Less: Debt issuance costs	​		—	​	​	—
Repayment of senior secured term loan	​	​	—	​	​	(300,000)
Net carrying amount	​	$	—	​	$	—

Summary of interest expense recognized related to debt

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three Months Ended

​

Six Months Ended

​

​

June 30,

​

June 30,

​

​

2024

​

2023

​

2024

​

2023

​

Contractual interest expense

$

—

​

$

9,354

​

$

—

​

$

18,532

​

Amortization of debt issuance costs

—

​

272

​

​

—

​

​

423

​

Total

$

—

​

$

9,626

​

$

—

​

$

18,955

​

Effective interest rate

​

—

%

​

13.4

%

​

—

%

​

13.4

%

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
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