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Stock Incentive Plans and Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Arrangement on Stock Option Activity
Stock option activity under our stock plans for the nine months ended September 30, 2025 is set forth below:
  Weighted-Average 
 Stock Options
Outstanding
Exercise
Price
Remaining
Contractual
Term (Years)
Aggregate
Intrinsic
Value
(in thousands)
Balance as of December 31, 20242,989,763 $36.23 
Granted— $— 
Exercised(20,995)$5.44 
Forfeited/Cancelled(88,499)$44.74 
Balance as of September 30, 20252,880,269 $36.19 4.8$8,933 
Exercisable as of September 30, 2025
2,840,192 $36.17 4.8$8,933 
Schedule of Share-based Payment Arrangement on Restricted Stock Units
The following table summarizes our RSU activity for the nine months ended September 30, 2025:
Restricted Stock Units OutstandingWeighted-Average Grant Date Fair Value
Balance as of December 31, 2024
3,196,224 $23.52 
Granted1,542,992 $21.14 
Vested(1)
(601,937)$23.50 
Forfeited/Cancelled(226,090)$23.44 
Balance as of September 30, 2025
3,911,189$22.59 
(1)The aggregate number of shares withheld upon vesting for employee tax obligations was 167,751 for the nine months ended September 30, 2025.
Schedule of Share-Based Payment Arrangement, Performance Shares, Activity
The following table summarizes our PSU activity for the nine months ended September 30, 2025:
Performance-Based Restricted Stock Units OutstandingWeighted-Average Grant Date Fair Value
Balance as of December 31, 2024
275,528 $21.94 
Granted172,631 $22.23 
Vested(98,015)$23.23 
Forfeited/Cancelled— $— 
Balance as of September 30, 2025
350,144$21.72 
(1)The aggregate number of shares withheld upon vesting for employee tax obligations was 35,426 for the nine months ended September 30, 2025.
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions The following table sets forth the assumptions used to determine the fair value of stock options:
 Nine Months Ended
September 30,
20252024
Average expected term (years)N/A5.0
Expected stock price volatilityN/A
80.20% - 80.20%
Risk-free interest rateN/A
4.39% - 4.39%
Dividend yieldN/A—%
Schedule of Share-based Payment Award, ESPP, Valuation Assumptions
The following table sets forth assumptions used to determine the fair value of the purchase rights issued under the ESPP:
 Nine Months Ended
September 30,
20252024
Average expected term (years)1.21.2
Expected stock price volatility
56.55% - 85.21%
59.85% - 130.95%
Risk-free interest rate
3.52% - 4.22%
3.82% - 5.33%
Dividend yield—%—%
Schedule of Share-based Payment Arrangement, Expensed and Capitalized, Amount
Stock-based compensation expense is included in the condensed consolidated statements of operations as follows (in thousands):
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2025202420252024
Cost of sales (exclusive of amortization of acquired intangible assets)$1,446 $1,464 $4,324 $4,179 
Research and development1,950 2,345 5,807 7,611 
Selling, general and administrative8,704 9,218 24,356 27,091 
Total stock-based compensation expense$12,100 $13,027 $34,487 $38,881