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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Stock-Based Compensation Expense
The Company recognizes stock-based compensation in the consolidated statements of operations, based on the department to which the related employee reports, as follows:
Three Months Ended March 31,
20242023
(in thousands)
Cost of net revenue$181 $210 
Research and development10,441 11,455 
Selling, general and administrative6,439 4,783 
$17,061 $16,448 
Summary of Restricted Stock Unit Activity
A summary of the Company’s restricted stock unit activity is as follows:
Number of Shares
(in thousands)
Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 20235,632 $36.72 
  Granted2,299 18.78 
  Vested(1,313)31.07 
  Canceled(387)38.48 
Outstanding at March 31, 20246,231 $31.18 
Summary of Performance-Based Restricted Stock Unit Activity
A summary of the Company’s performance-based restricted stock unit activity is as follows:
Number of Shares
(in thousands)
Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 20232,653 $34.38 
  Granted(1)
1,460 17.77 
  Vested(6)58.31 
  Canceled(598)41.90 
Outstanding at March 31, 20243,509 $26.15 
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(1) Number of shares granted is based on the maximum percentage achievable in the performance-based restricted stock unit award.
Summary of Employee Stock Purchase Plan, Valuation Assumptions
The fair values of employee stock purchase rights were estimated using the Black-Scholes option pricing model at their respective grant date using the following assumptions:
Three Months Ended March 31,
20242023
Weighted-average grant date fair value per share$6.35 $11.97 
Risk-free interest rate5.41 %4.54 %
Dividend yield— %— %
Expected life (in years)0.500.50
Volatility70.46 %59.78 %
Summary of Stock Option Activity
A summary of the Company’s stock options activity is as follows:
Number of Options
(in thousands)
Weighted-Average Exercise PriceWeighted-Average Contractual Term (in years)Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2023375 $17.29 
Granted2,688 19.45 
Exercised(39)7.68 
Canceled(1)23.75 
Outstanding at March 31, 20243,023 $19.33 8.95$4,493 
Vested and expected to vest at March 31, 20243,023 $19.33 8.95$4,493 
Exercisable at March 31, 2024335 $18.40 1.36$811 
Schedule of Stock Options, Valuation Assumptions
The fair values of stock options were estimated using the Black-Scholes option pricing model at their respective grant date using the following assumptions:
Three Months Ended March 31,
20242023(1)
Weighted-average grant date fair value per share
$10.84 - $11.24
N/A
Risk-free interest rate4.33 %N/A
Dividend yield— %N/A
Expected life (in years)6.50N/A
Volatility57.50 %N/A
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(1) No options were granted during the three months ended March 31, 2023.