Quarterly report pursuant to Section 13 or 15(d)

Activity Related to Notes (Detail)

v3.10.0.1
Activity Related to Notes (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2018
Aug. 31, 2018
Nov. 30, 2018
May 31, 2018
Debt Instrument [Line Items]        
Face amount of convertible promissory note   $ 5,700,000   $ 0
Monthly redemption   0   0
Unamortized discount   (626,242)   0
Carrying value of convertible notes   5,073,758 $ 5,596,974 0
Short-Term Debt        
Debt Instrument [Line Items]        
Face amount of convertible promissory note   2,100,000    
Monthly redemption   700,000    
Unamortized discount   (344,614)    
Carrying value of convertible notes   2,455,386 4,200,000  
Long-Term Debt        
Debt Instrument [Line Items]        
Face amount of convertible promissory note   3,600,000    
Monthly redemption   (700,000)    
Unamortized discount   (281,628)    
Carrying value of convertible notes   $ 2,618,372 1,396,974  
Short-Term Convertible Notes        
Debt Instrument [Line Items]        
Face amount of convertible promissory note $ 6,300,000   0 6,038,500
Unamortized discount     0 0
Registered direct equity offering     0 (5,788,500)
Note repayment $ (259,000)   0 (250,000)
Carrying value of convertible notes     $ 0 $ 0