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Summary of Business and Significant Accounting Policies (Tables)
12 Months Ended
May 31, 2021
Accounting Policies [Abstract]  
Schedule of considers short-term highly liquid investments
   2021   2020 
Cash in banks  $7,317,517   $9,677,848 
Money market funds   53,129    52,174 
   $7,370,646   $9,730,022 
Schedule of major categories of assets measured at fair value on a recurring basis
May 31, 2021  Level 1   Level 2   Level 3   Total 
Equity Securities  $45,696   $         -   $         -   $45,696 
May 31, 2020  Level 1   Level 2   Level 3   Total 
Equity Securities  $50,344   $         -   $         -   $50,344 
Schedule of marketable securities
May 31, 2021  Amortized
Cost
   Gross
Unrealized
Holding
Gains
   Gross
Unrealized
Holding
Losses
   Recorded
Value
 
Equity Securities  $16,866   $28,830   $                -   $45,696 

 

                    
May 31, 2020                             
Equity Securities  $16,866   $33,478   $         -   $50,344 
Schedule of depreciation and amortization of equipment and leasehold improvements
Equipment  3 years  
Furniture and fixtures  3 years  
Automobiles  3 years  
Leasehold improvements  Lesser of lease term or useful life