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MARKETABLE EQUITY SECURITIES (Tables)
 6 Months Ended
Jun. 30, 2022
Marketable Equity Securities  
Schedule of marketable equity securities
                    
   Marketable equity securities at June 30, 2022 
       Gross unrealized   Gross unrealized     
   Cost   gains   losses   Fair value 
 Common shares  $26,063,000   $481,000   $(9,077,000)  $17,467,000 

 

   Marketable equity securities at December 31, 2021 
       Gross unrealized   Gross unrealized     
   Cost   gains   losses   Fair value 
 Common shares  $53,475,000   $32,000   $(13,127,000)  $40,380,000