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Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Stock-based Compensation

Summary of performance share units activity

​

​	​	​	​	​	​
​	​	​	​	Weighted-Average
​	​	Shares	​	Grant Date Fair Value
Outstanding at December 31, 2022	​	447,770	​	$	28.71
Granted	​	216,500	​	​	38.71
Vested	​	(223,170)	​	​	27.99
Forfeited	​	—	​	​	—
Performance adjustment	​	62,780	​	​	27.14
Outstanding at June 30, 2023	​	503,880	​	$	33.13

Summary of restricted stock units activity

​

​	​	​	​	​	​
​	​	​	​	Weighted-Average
​	​	Shares	​	Grant Date Fair Value
Outstanding at December 31, 2022	​	2,047,571	​	$	19.67
Granted	​	1,248,207	​	​	26.33
Vested	​	(626,539)	​	​	20.03
Forfeited	​	(147,214)	​	​	21.62
Outstanding at June 30, 2023	​	2,522,025	​	$	22.76

Summary of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​		​		​	​		Weighted-		​	​
​	​	​		​	Weighted-		Average	​	​	​
​	​	​		​	Average		Remaining	​	​	Aggregate
​	​	​	​	​	Exercise Price		Contractual	​	​	Intrinsic
​		Shares		​	per Share		Term (in years)		​	Value
Outstanding at December 31, 2022		1,683,805	​	$	18.84		5.5	​	$	7,953
Exercised		(306,537)	​	​	16.58	​	​	​	​	​
Cancelled		(8,300)	​	​	18.80	​	​	​	​	​
Outstanding at June 30, 2023		1,368,968	​	$	19.35		5.0	​	$	4,411
Exercisable at June 30, 2023		1,308,248	​	$	19.30	​	4.9	​	$	4,345

Summary of stock-based compensation

​

​	​	​	​	​	​	​	​	​	​	​	​
​	Three Months Ended June 30,					​	Six Months Ended June 30,
​	2023		​	2022		​	2023		​	2022
Research and development	$	—		$	—	​	$	—		$	1,591
Selling, general and administrative		7,072	​	​	5,692	​		13,107	​	​	10,236
Total stock-based compensation expense	$	7,072	​	$	5,692	​	$	13,107	​	$	11,827

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the change in restricted stock units (RSUs).

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