Quarterly report pursuant to Section 13 or 15(d)

Derivative Liability - Additional Information (Detail)

v3.19.3
Derivative Liability - Additional Information (Detail) - USD ($)
3 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Derivative [Line Items]    
Change in fair value of derivative liability $ 625,333 $ (747,467)
Percentage Of Outstanding Common Stock To Be Acquired 50.00%  
Warrant [Member]    
Derivative [Line Items]    
Change in fair value of derivative liability $ 63,000 $ (747,000)
Convertible Note [Member]    
Derivative [Line Items]    
Change in fair value of derivative liability $ 562,000