Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Stock Based Compensation (Details)

v3.5.0.2
Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Stock Based Compensation (Details) - USD ($)
12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Expected volatility, minimum 83.57% 86.02%
Expected volatility, maximum 98.23% 117.50%
Risk-free interest rate, minimum 0.71% 0.36%
Risk-free interest rate, maximum 2.01% 2.13%
Expected forfeiture rate 0.00% 0.00%
Expected dividend yield
Minimum [Member]    
Expected term 2 years 29 days 1 year 7 months 6 days
Maximum [Member]    
Expected term 10 years 6 years 6 months