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Marketable Securities (Tables)
9 Months Ended
Feb. 28, 2021
Marketable Securitie [Abstract]  
Schedule of assets measured at fair value on a recurring basis
February 28, 2021  Level 1   Level 2   Level 3   Total 
Equity Securities  $48,624   $    -   $    -   $48,624 
   $48,624   $-   $-   $48,624 
May 31, 2020  Level 1   Level 2   Level 3   Total 
Equity Securities  $50,344   $   -   $   -   $50,344 
   $50,344   $-   $-   $50,344 
Schedule of unrealized gains and losses are included in earnings
February 28, 2021
Current
  Amortized
Cost
   Gross
Unrealized
Holding
Gains
   Gross
Unrealized
Holding
Losses
   Recorded
Value
 
Equity Securities  $16,866   $31,758   $    -   $48,624 
   $16,866   $31,758   $-   $48,624 
May 31, 2020
Current
  Amortized
Cost
   Gross
Unrealized
Holding
Gains
   Gross
Unrealized
Holding
Losses
   Recorded
Value
 
Equity Securities  $16,866   $33,478   $-   $50,344 
   $16,866   $33,478   $-   $50,344