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Stockholders' Equity - Schedule of Restricted Stock Unit Award ("RSU") and Cash Restricted Stock Unit Award (''CRSU'') Activity (Details)
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Restricted Stock Units RSU  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Shares, Unvested Beginning Balance | shares 2,735,706
Number of Shares, Granted | shares 190,838
Number of Shares, Vested | shares (189,460)
Number of Shares, Forfeited | shares (13,840)
Number of Shares, Unvested Ending Balance | shares 2,723,244
Grant Date Fair Value per share, Unvested Beginning Balance | $ / shares $ 22.4
Grant Date Fair Value per share, Granted | $ / shares 107.1
Grant Date Fair Value per share, Vested | $ / shares 22.8
Grant Date Fair Value per share, Forfeited | $ / shares 13.0
Grant Date Fair Value per share, Unvested Ending Balance | $ / shares $ 28.2
Cash Restricted Stock Unit Award CRSU  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Shares, Unvested Beginning Balance | shares 624
Number of Shares, Granted | shares 3,025
Number of Shares, Vested | shares (3,405)
Number of Shares, Unvested Ending Balance | shares 244
Grant Date Fair Value per share, Unvested Beginning Balance | $ / shares $ 35.1
Grant Date Fair Value per share, Granted | $ / shares 111.9
Grant Date Fair Value per share, Vested | $ / shares 101.7
Grant Date Fair Value per share, Unvested Ending Balance | $ / shares $ 58.4