XML 37 R26.htm IDEA: XBRL DOCUMENT v3.21.4
Marketable Securities (Tables)
6 Months Ended
Nov. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of major categories of assets measured at fair value on a recurring basis
November 30, 2021  Level 1   Level 2   Level 3   Total 
Equity Securities  $39,360   $
   -
   $
   -
   $39,360 

 

May 31, 2021  Level 1   Level 2   Level 3   Total 
Equity Securities  $45,696   $
   -
   $
   -
   $45,696 

 

Schedule of marketable securities
November 30, 2021  Amortized
Cost
   Gross
Unrealized
Holding
Gains
   Gross
Unrealized
Holding
Losses
   Recorded
Value
 
Equity Securities  $16,866   $22,494   $
        -
   $39,360 

 

May 31, 2021  Amortized
Cost
   Gross
Unrealized
Holding
Gains
   Gross
Unrealized
Holding
Losses
   Recorded
Value
 
Equity Securities  $16,866   $28,830   $
       -
   $45,696