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Convertible Senior Notes (Tables) - Convertible senior notes

6 Months Ended

Jun. 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	​	(443)	​	​	(5,886)	​	​	(6,329)
Net carrying amount	$	25,907	​	$	235,614	​	$	261,521

Schedule of total interest expense recognized related to the convertible notes

​

​	​	​	​	​	​	​	​	​	​	​	​
​	Three Months Ended June 30,					​	Six Months Ended June 30,
​	2023		​	2022		​	2023		​	2022
Contractual interest expense	$	1,909	​	$	943	​	$	3,388	​	$	1,887
Amortization of debt issuance costs	​	298	​	​	226	​	​	561	​	​	449
Total interest expense	$	2,207	​	$	1,169	​	$	3,949	​	$	2,336

Schedule of future minimum payments

​

​	​	​	​	​	​	​	​	​
Years ended December 31,	2026 Convertible Notes		​	2029 Convertible Notes		​	Total Convertible Notes
2023	$	346	​	$	3,568	​	$	3,914
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	$	28,426	​	$	283,255	​	$	311,681
Less: interest	​	(2,076)	​	​	(41,755)	​	​	(43,831)
Less: unamortized issuance costs	​	(443)	​	​	(5,886)	​	​	(6,329)
Convertible Notes carrying value	$	25,907	​	$	235,614	​	$	261,521

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