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)

v3.8.0.1
Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Stock Based Compensation (Details) - USD ($)
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Expected volatility, minimum 71.90% 83.57%
Expected volatility, maximum 124.50% 98.23%
Risk-free interest rate, minimum 0.82% 0.71%
Risk-free interest rate, maximum 2.52% 2.01%
Expected forfeiture rate 0.00% 0.00%
Expected dividend yield
Minimum [Member]    
Expected term 2 years 29 days 2 years 29 days
Maximum [Member]    
Expected term 10 years 10 years