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Stock-Based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Feb. 28, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted during the period   737,560   1,061,250  
Intrinsic value of stock options exercised   $ 79,800,000 $ 500,000    
Allocated share based compensation expense   167,500,000 11,100,000    
Options unrecognized compensation   $ 451,500,000      
Options unrecognized compensation period of recognition   3 years 4 months 24 days      
Proceeds from exercise of stock options   $ 14,400,000 $ 200,000    
Share based compensation by share based payment arrangement stock options granted during the period   1,888,660      
Other non-current liabilities   $ 26,700,000     $ 23,500,000
SHARES Granted Under Stock Plans Subject To Repurchase [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares subject to repurchase   1,740,600      
Ipo Based Restricted Stock Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated share based compensation expense   $ 148,500,000      
Performance Shares [Member] | Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated share based compensation expense   $ 0      
Share-based compensation arrangement by share based payment award restricted stock units granted   8,611,810      
Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Proceeds from exercise of stock options   $ 4,500,000      
Other non-current liabilities   $ 9,000,000      
2012 Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Contractual term   10 years      
2012 Stock Incentive Plan [Member] | Restricted Stock Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Contractual term   7 years      
2021 Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant 29,666,480 41,105,315      
2021 Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 7,416,620        
Share based compensation by share based payment arrangement increase in the shares authorised for issuance as a percentage of shares outstanding 1.00%        
Share based compensation by share based payment arrangement stock options granted during the period 0        
2021 Employee Stock Purchase Plan [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 150,000,000