Quarterly report pursuant to Section 13 or 15(d)

Derivative Liability - Additional Information (Detail)

v3.19.3.a.u2
Derivative Liability - Additional Information (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2019
Nov. 30, 2018
Derivative [Line Items]        
Change in fair value of derivative liability $ 203,166 $ 281,055 $ 828,499 $ (466,412)
Percentage Of Outstanding Common Stock To Be Acquired     50.00%  
Warrant [Member]        
Derivative [Line Items]        
Change in fair value of derivative liability     $ 280,000 $ (466,000)
Convertible Note [Member]        
Derivative [Line Items]        
Change in fair value of derivative liability     $ 549,000