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Debt - (Tables)

12 Months Ended

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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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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