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Stockholders' Equity (Employee Stock Purchase Plan, Additional Information) (Details) - shares
12 Months Ended
Aug. 31, 2021
Jan. 21, 2021
Aug. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for issuance under share based compensation plan (in shares) 10,981,300   10,609,508
ESPP | Employee stock purchase plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum aggregate number of shares authorized (in shares)   23,000,000  
Eligibility period for employees to participate in ESPP 90 days    
Maximum percentage of an employees salary that can be used to purchase shares under the ESPP (as a percent) 10.00%    
Percentage for fair market value fixed for pricing (as a percent) 85.00%    
Shares available for issuance under share based compensation plan (in shares) 12,001,770