Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Details) (Parenthetical)

v3.5.0.2
Stock-Based Compensation - Summary of Stock Option Activity (Details) (Parenthetical)
12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Stockholders' Equity, Reverse Stock Split 1-for-20 reverse stock split 1-for-20 reverse stock split