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Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation Expense
Share-based compensation expense is as follows (dollars in thousands):
 Year Ended December 31,
 202420232022
Research and development$5,148 $4,743 $2,922 
Selling, general and administrative22,607 22,016 14,646 
Total$27,755 $26,759 $17,568 
Summary of Stock Option Activity
The following table summarizes stock option activities:
Number of
Options
Weighted
Average
Exercise Price
(per share)		Weighted
Average
Remaining
Contractual
Term (in years)		Aggregate
Intrinsic Value
(in thousands)
Outstanding, December 31, 20225,797,569 $26.99 6.1$53,650 
Granted1,204,643 $37.78 
Exercised(258,154)$16.70 
Forfeited(160,236)$33.48 
Outstanding, December 31, 20236,583,822 $29.20 5.9$23,668 
Granted 1,206,812 $28.29 
Exercised (781,441)$16.12 
Forfeited (290,120)$31.96 
Outstanding, December 31, 20246,719,073 $30.44 5.9$43,198 
As of December 31, 2024
Vested and expected to vest6,719,073 $30.44 5.9$43,198 
Exercisable 4,137,283 $29.54 4.4$30,396 
Schedule of Assumptions used in Estimation of Fair Value of Each Award Option on the Date of Grant using Black-Scholes Option-Pricing Model
The fair value of each option award is estimated on the date of the grant, using the Black-Scholes option-pricing model and the assumptions in the following table:
 
Year Ended December 31,
202420232022
Fair value of common stock
$27.94 - $36.16
$27.66 - $38.60
$28.93 - $35.23
Expected volatility
55.56% - 56.55%
56.87% - 58.22%
58.71% - 60.15%
Expected dividend yield0%0%0%
Expected term
5.77 years - 7.91 years
5.60 years - 7.03 years
5.58 years - 6.72 years
Risk-free interest rate
3.82% - 4.57%
3.27% - 4.33%
1.87% - 3.70%
Restricted Stock and Restricted Stock Unit Activity
The following table summarizes restricted stock unit (RSU) activities:
Number of
RSUs		Weighted-
Average
Grant Date Fair Value per Share
Nonvested, December 31, 2022131,960 $32.17 
Granted227,980 $38.60 
Vested(47,049)$32.18 
Forfeited(12,750)$35.68 
Nonvested, December 31, 2023300,141 $36.90 
Granted198,414 $28.06 
Vested(100,891)$36.51 
Forfeited(19,499)$34.71 
Nonvested, December 31, 2024378,165 $32.48 
Performance Shares Activity
The following table summarizes performance share unit (PSU) activities:
Performance-Based PSUsMarket-Based UnitsTotal PSUs
Number of PSUsWeighted-
Average
Grant Date Fair Value per Share		Number of PSUsWeighted-
Average
Grant Date Fair Value per Share		Number of PSUsWeighted-
Average
Grant Date Fair Value per Share
Nonvested, December 31, 2022181,750 $29.07 20,000 $28.63 201,750 $29.03 
Granted205,000 $34.00 — $— 205,000 $34.00 
Vested(132,120)$30.72 — $— (132,120)$30.72 
Forfeited(3,000)$28.93 — $— (3,000)$28.93 
Nonvested, December 31, 2023251,630 $32.22 20,000 $28.63 271,630 $31.96 
Granted252,700 $26.91 — $— 252,700 $26.91 
Vested(121,595)$31.68 — $— (121,595)$31.68 
Forfeited(58,050)$29.37 — $— (58,050)$29.37 
Nonvested, December 31, 2024324,685 $28.80 20,000 $28.63 344,685 $28.79