Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.8.0.1
Stock-Based Compensation (Tables)
3 Months Ended
Oct. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Assumptions Used to Calculate Fair Value of Stock Based Compensation

The following assumptions were used for the Black-Scholes calculation of the fair value of stock-based compensation related to stock options granted during the periods presented:

 

    Three Months Ended
October 31, 2017
    Three Months Ended
October 31, 2016
 
Expected volatility     74.87% - 91.80 %     91.73% - 97.10 %
Risk-free interest rate     1.66% - 1.99 %     0.82% - 1.54 %
Expected forfeiture rate     0.00 %     0.00 %
Expected dividend yield            
Expected term     5.0 – 6.5 years       2.9 – 6.5 years