XML 75 R87.htm IDEA: XBRL DOCUMENT v3.19.3
Stockholders' Equity (Equity Compensation Plan, Additional Information) (Details) - shares
Aug. 31, 2019
Aug. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Maximum aggregate number of shares subject to awards 12,040,581 12,837,158
the 2011 Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Maximum aggregate number of shares subject to awards 23,300,000