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Share-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation
 Three Months Ended
March 31,
  20222021
Cost of revenues$1,415 $1,578 
Research and development4,070 3,228 
Sales and marketing2,043 1,988 
General and administrative3,671 2,304 
      Total$11,199 $9,098 
During the quarter ended March 31, 2022, the Board of Directors of the Company approved and the Company granted restricted stock units to eligible employees under the 2018 Plan that were immediately vested, as fiscal 2021 annual bonus payments. The total charges recorded during the quarter ended March 31, 2022 were $8.8 million. Such bonus payments in fiscal 2021 were paid and recorded in the quarter ended March 31, 2021 and total charges related to such bonus payments were $7.0 million.
Summary of Stock Option Activity The following table summarizes the Company’s stock option activity for the three months ended March 31, 2022:
Outstanding — December 31, 20218,085,793 
Granted1,302,500 
Exercised(130,790)
Canceled(583,612)
Outstanding — March 31, 20228,673,891 
Exercisable — March 31, 20224,931,898 
Summary of Restricted Stock Unit Activity The following table summarizes the Company’s RSU activity:
Non-vested — December 31, 20211,247,723 
Granted2,139,100 
Vested(1,892,613)
Forfeited(50,700)
Non-vested — March 31, 20221,443,510