Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Detail)

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Related Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended
Nov. 08, 2017
Jul. 28, 2017
Jul. 26, 2017
Aug. 31, 2018
Jul. 10, 2018
Private Equity Offering          
Related Party Transaction [Line Items]          
Proceeds from private equity offering       $ 7,500,000  
Warrants to purchase common shares, shares       7,514,300  
Exercise price of warrants, per share       $ 0.75  
Chief Science Officer          
Related Party Transaction [Line Items]          
Stock options covered         500,000
Managing Director          
Related Party Transaction [Line Items]          
Stock options covered         100,000
Jordan G. Naydenov | Private Equity Offering          
Related Party Transaction [Line Items]          
Warrants to purchase common shares, shares     66,666    
Exercise price of warrants, per share     $ 1.00    
Jordan G. Naydenov | Short Term Convertible Promissory Notes | Private Equity Offering          
Related Party Transaction [Line Items]          
Purchased short term convertible promissory note interest     7.00%    
Proceeds from private equity offering     $ 100,000    
Alpha Venture Capital Partners, L.P.          
Related Party Transaction [Line Items]          
Warrants to purchase common shares, shares   33,333      
Exercise price of warrants, per share   $ 1.00      
Alpha Venture Capital Partners, L.P. | Short Term Convertible Promissory Notes          
Related Party Transaction [Line Items]          
Purchased short term convertible promissory note interest   7.00%      
Proceeds from private equity offering   $ 50,000      
Anthony D Caracciolo | Private Equity Offering          
Related Party Transaction [Line Items]          
Stock and warrants issued during period value common stock and warrants $ 100,000