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Stock Plans and Stock-Based Compensation - Summary of RSU and PSU Activity (Details) - Restricted Stock Units and Performance-Based Restricted Stock Units
9 Months Ended
Sep. 30, 2021
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Shares, Outstanding, Beginning Balance 1,420,541
Number of Shares, Granted 641,442
Number of Shares, Vested (307,889)
Number of Shares, Forfeited (135,266)
Number of Shares, Outstanding, Ending Balance 1,618,828