Quarterly report pursuant to Section 13 or 15(d)

Derivative Liability - Additional Information (Detail)

v3.20.4
Derivative Liability - Additional Information (Detail) - USD ($)
6 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Derivative [Line Items]    
Change in fair value of derivative liability   $ 829,000
Percentage Of Outstanding Common Stock To Be Acquired 50.00%  
Warrant [Member]    
Derivative [Line Items]    
Change in fair value of derivative liability   300,000
Convertible Note [Member]    
Derivative [Line Items]    
Change in fair value of derivative liability $ 0 $ 600,000