Stock-based Payment Compensation (Details Textual)	6 Months Ended
Jan. 31, 2020 shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of stock options exercised	5,852,000
Stock Based Compensation (Textual)
Shares available for calculating intrinsic value (in shares)	8,846,693

Number of share options (or share units) exercised during the current period.

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