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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Fair Value of Options
The fair value of the stock options granted were estimated on the date of grant using a Black-Scholes option pricing model with the following weighted-average assumptions:
 Three Months Ended March 31,
 20242023
Expected stock price volatility57.2 %59.3 %
Risk free interest rate4.0 %3.9 %
Expected life of options (years)5.65.5
Expected annual dividend per share$— $— 
Schedule of Stock Options Activity A summary of the Company's stock options for the three months ended March 31, 2024 were as follows:
Number of
Shares
Weighted Average Exercise 
Price
Weighted Average Remaining
Years
Aggregate
Intrinsic
Value
 (in thousands)  (in millions)
Options outstanding, December 31, 202323,002 $11.69   
Granted4,033 $14.23   
Exercised(439)$7.86   
Forfeited(271)$12.56   
Expired(20)$17.28 
Options outstanding, March 31, 202426,305 $12.13 6.4$23.9 
Vested and unvested expected to vest, March 31, 202424,409 $12.08 6.2$23.5 
Exercisable at March 31, 202415,979 $11.60 4.9$22.3 
Schedule of Non-Vested RSU Activity under the Plan A summary of non-vested RSU activity under the Plan for the three months ended March 31, 2024 is as follows:
Number of
Shares
Weighted
Average Grant
Date Fair
Value
Weighted 
Average
Remaining 
Years
Aggregate
Intrinsic
Value
(in thousands)(in millions)
Non-vested units as of December 31, 202310,033 $13.37   
Granted3,251 $15.35   
Vested(3,332)$13.49   
Forfeited(393)$14.66   
Non-vested units as of March 31, 20249,559 $13.92 2.5$112.6 
Schedule of Equity Compensation Expenses
The following table summarizes information related to compensation expense recognized in the Company's Consolidated Statements of Operations related to the equity awards:
 Three Months Ended March 31,
(in thousands)20242023
Research and development expense$4,871 $8,490 
Selling, general, and administrative expense25,932 26,404 
Total equity compensation expense$30,803 $34,894