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Share-Based Compensation
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Compensation
Note 12. Share-Based Compensation
A summary of share-based compensation expense recognized in the Condensed Consolidated Statements of Operations is as follows (in thousands):
Three Months Ended
June 30,		Six Months Ended
June 30,
 2024202320242023
Cost of revenues$7,883 $8,870 $15,916 $17,604 
Research and development19,055 22,888 38,297 46,093 
Sales and marketing32,874 40,026 66,789 76,761 
General and administrative26,968 32,876 53,946 62,393 
Total share-based compensation expense$86,780 $104,660 $174,948 $202,851 
A summary of share-based compensation expense by award type is as follows (in thousands):
Three Months Ended
June 30,		Six Months Ended
June 30,
 2024202320242023
Employee stock purchase plan rights (“ESPP”)$1,972 $2,430 $3,703 $4,681 
Performance stock units (“PSUs”) 5,373 3,767 12,374 4,336 
Restricted stock units (“RSUs”) 79,435 98,463 158,871 193,834 
Total share-based compensation expense$86,780 $104,660 $174,948 $202,851 
Equity Incentive Plans
As of June 30, 2024, a total of 14,065,978 shares remained available for grant under the Company’s Amended and Restated 2013 Equity Incentive Plan (“2013 Plan”).
Employee Stock Purchase Plan
The Company’s ESPP allows eligible employees to purchase shares of the Company’s Class A Common Stock at a discounted price through payroll deductions.
As of June 30, 2024, there was a total of $1.9 million of unrecognized share-based compensation expense, net of estimated forfeitures, related to the ESPP, which will be recognized on a straight-line basis over the remaining weighted-average vesting period of approximately 0.4 years. As of June 30, 2024, a total of 6,781,827 shares were available for issuance under the ESPP.
Restricted and Performance Stock Units
A summary of activity of restricted and performance-based stock units as of June 30, 2024, and changes during the period then ended is presented in the following table:
Number of
RSUs/PSUs
Outstanding
(in thousands)		Weighted-
Average
Grant Date Fair
Value Per Share		Aggregate
Intrinsic Value
(in thousands)
Outstanding as of December 31, 202310,047 $52.47 $325,153 
Granted5,100 36.58 
Released(3,381)55.70 
Canceled/Forfeited(912)43.18 
Outstanding as of June 30, 202410,854 $44.78 $306,086 
Restricted Stock Units
The 2013 Plan provides for the issuance of RSUs to employees, directors, and consultants. RSUs issued under the 2013 Plan generally vest over three or four years.
As of June 30, 2024, there was a total of $373.3 million of unrecognized share-based compensation expense, net of estimated forfeitures, related to RSUs, which will be recognized on a straight-line basis over the remaining weighted-average vesting period of approximately 2.5 years.
Performance Stock Units
The 2013 Plan provides for the issuance of PSUs. The PSUs granted under the 2013 Plan are contingent upon the achievement of predetermined market, performance, and service conditions. The Company uses a Monte Carlo simulation model to determine the fair value of its market condition PSUs. PSU expense is recognized using the graded vesting method over the requisite service period. For performance-based metrics, the compensation expense is based on a probability of achievement of the performance conditions. For market-based conditions, if the market conditions are not met but the service conditions are met, the PSUs will not vest; however, any stock-based compensation expense recognized will not be reversed.
For the majority of the PSUs granted, the number of shares of common stock to be issued at vesting will range from 0% to 200% of the target number based on the achievement of the different performance and market conditions over the respective measurement period. The PSUs generally vest over a two or three-year period.
As of June 30, 2024, there was a total of $30.0 million unrecognized share-based compensation expense, net of estimated forfeitures, related to these PSUs, which will be recognized over the remaining service period of approximately 1.0 year.
Employee Equity Compensation Plans
The Company’s board of directors adopted employee equity bonus and executive equity compensation plans (“Plans”), which allow the recipients to earn fully vested shares of the Company’s Class A Common Stock upon the achievement of quarterly service and/or performance conditions and in lieu of a portion of base salary. During the three and six months ended June 30, 2024, the Company issued 344,721 and 714,518, respectively, under these Plans. The shares under these Plans are issued from the reserve of shares available for issuance under the 2013 Plan. The total requisite service period for these Plans is approximately 0.4 years.
The unrecognized share-based compensation expense as of June 30, 2024 was approximately $4.2 million, which will be recognized over the remaining service period of 0.1 years. The shares issued under these Plans are issued from the reserve of shares available for issuance under the 2013 Plan.