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Convertible Senior Notes (Tables) - Convertible senior notes

9 Months Ended

Sep. 30, 2023

Debt Instrument [Line Items]

Schedule of convertible notes outstanding

​

​	​	​	​	​	​	​	​	​
​	2026 Convertible Notes		​	2029 Convertible Notes		​	Total Convertible Notes
Principal	$	26,350	​	$	241,500	​	$	267,850
Less: unamortized issuance costs	​	(401)	​	​	(5,626)	​	​	(6,027)
Net carrying amount	$	25,949	​	$	235,874	​	$	261,823

Schedule of total 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	$	1,909	​	$	943	​	$	5,297	​	$	2,830
Amortization of debt issuance costs	​	302	​	​	228	​	​	863	​	​	678
Total interest expense	$	2,211	​	$	1,171	​	$	6,160	​	$	3,508

Schedule of future minimum payments

​

​	​	​	​	​	​	​	​	​
Years ended December 31,	2026 Convertible Notes		​	2029 Convertible Notes		​	Total Convertible Notes
2023	$	—	​	$	—	​	$	—
2024	​	692	​	​	6,943	​	​	7,635
2025	​	692	​	​	6,943	​	​	7,635
2026	​	26,696	​	​	6,943	​	​	33,639
2027	​	—	​	​	6,943	​	​	6,943
Thereafter	​	—	​	​	251,915	​	​	251,915
Total minimum payments	$	28,080	​	$	279,687	​	$	307,767
Less: interest	​	(1,730)	​	​	(38,187)	​	​	(39,917)
Less: unamortized issuance costs	​	(401)	​	​	(5,626)	​	​	(6,027)
Convertible Notes carrying value	$	25,949	​	$	235,874	​	$	261,823

​

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