Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Schedule of assumptions used (Details)

v3.19.2
STOCKHOLDERS' EQUITY - Schedule of assumptions used (Details)
9 Months Ended
May 31, 2019
May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility   60.00%
Expected dividend yield 0.00% 0.00%
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term in years 1 year 1 year
Expected volatility 69.00%  
Risk-free interest rate 2.29% 0.67%
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term in years 3 years 4 years
Expected volatility 87.00%  
Risk-free interest rate 3.01% 0.81%