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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Stock-based Compensation

Summary of performance share units activity

​

​	​	​	​	​	​
​	​	​	​	Weighted-Average
​	​	Shares	​	Grant Date Fair Value
Outstanding as of December 31, 2023	​	503,880	​	$	33.13
Granted	​	308,972	​	​	44.15
Vested	​	(514,050)	​	​	32.53
Forfeited	​	(165,700)	​	​	43.12
Performance adjustment	​	196,550	​	​	32.58
Outstanding as of December 31, 2024	​	329,652	​	$	39.04

Summary of restricted stock units activity

​

​	​	​	​	​	​
​	​	​	​	Weighted-Average
​	​	Shares	​	Grant Date Fair Value
Outstanding as of December 31, 2023	​	2,443,907	​	$	22.88
Granted	​	1,345,309	​	​	34.33
Vested	​	(967,773)	​	​	23.09
Forfeited	​	(338,101)	​	​	28.25
Outstanding as of December 31, 2024	​	2,483,342	​	$	28.27

Summary of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​		​		​	​		Weighted-		​	​
​	​	​		​	Weighted-		Average	​	​	​
​	​	​		​	Average		Remaining	​	​	Aggregate
​	​	​	​	​	Exercise Price		Contractual	​	​	Intrinsic
​		Shares		​	per Share		Term (in years)		​	Value
Outstanding as of December 31, 2023		1,176,750	​	$	19.48		4.3	​	$	13,297
Granted	​	130,344	​	​	31.41	​	​	​	​	​
Exercised		(502,688)	​	​	20.38	​	​	​	​	​
Cancelled		(1,000)	​	​	27.73	​	​	​	​	​
Outstanding as of December 31, 2024		803,406	​	$	20.84		4.4	​	$	6,634
Exercisable as of December 31, 2024		673,062	​	$	18.79		3.3	​	$	6,634

Schedule of fair value assumption using Black-Scholes option-pricing model

​

​	​	​	​	​	​	​	​	​
​	Years Ended December 31,
​	2024		​	2023		​	2022
Risk-free interest rate	4.4	%	​	—	%	​	—	%
Volatility	51.7	%	​	—	%	​	—	%
Expected term (years)	6.1	​	​	—	​	​	—	​
Expected dividend yield	—	%	​	—	%	​	—	%

Summary of stock-based compensation

​

​	​	​	​	​	​	​	​	​
​	Years Ended December 31,
​	2024		​	2023		​	2022
Research and development	$	—		$	—		$	1,591
Selling, general and administrative		32,400	​	​	27,136	​	​	21,283
Total stock-based compensation expense	$	32,400	​	$	27,136	​	$	22,874

​

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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 significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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

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Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares.

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