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Debt - (Tables)

9 Months Ended

Sep. 30, 2023

Debt Instrument, Redemption [Line Items]

Summary of liability for sale of future royalties

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​	​	​	​	​
​		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

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​	​	​	​	​	​	​	​
​		​	​	​	​	​	​
​	​	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

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​	​	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

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Three Months Ended September 30,

Nine Months Ended September 30,

​

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2023

2022

2023

2022

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Contractual interest expense

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$

—

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$

559

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$

—

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$

2,800

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Amortization of debt issuance costs

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—

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92

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—

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460

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Total

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$

—

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$

651

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$

—

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$

3,260

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Effective interest rate

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—

%

3.5

%

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%

3.5

%

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Blackstone Credit Agreement

Debt Instrument, Redemption [Line Items]

Schedule of credit agreement

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​	​	​	​	​	​	​
​	​	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

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​	​	​	​	​	​	​
​	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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+ 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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