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3. Fair Value of Financial Instruments (Tables)
3 Months Ended
Aug. 31, 2020
Fair Value Disclosures [Abstract]  
Schedule of fair value of financial assets and liabilities
       Fair Value Measurements at August 31, 2020 Using 
   Fair Value at
August 31,
2020
   Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
   Significant Other
Observable
Inputs
(Level 2)
   Significant
Unobservable
Inputs
(Level 3)
 
Assets:                
Cash  $373,378   $373,378   $   $ 
Restricted cash and cash equivalents   177,244    177,244         
Total assets  $550,622   $550,622   $   $ 
                     
Liabilities:                    
Anti-dilution issuance rights liability  $83,500   $   $   $83,500 
Total liabilities  $83,500   $   $   $83,500 

  

       Fair Value Measurements at May 31, 2020 Using 
   Fair Value at
May 31,
2020
   Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
   Significant Other
Observable
Inputs
(Level 2)
   Significant
Unobservable
Inputs
(Level 3)
 
Assets:                
Cash  $500   $500   $   $ 
Total assets  $500   $500   $   $ 
Schedule of assumptions used
   At August 31, 2020   At inception 
Fair value of common stock (per share)   $0.0080    $0.0066 
Estimated additional shares of common stock   22,395,346    28,730,844 
Expected volatility   135%    135% 
Expected term (years)   0.45    0.45 
Risk-free interest rate   0.12%    0.11%