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MARKETABLE EQUITY SECURITIES (Details) - Common Stock [Member] - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Net Investment Income [Line Items]    
Cost $ 26,063,000 $ 53,475,000
Gross unrealized gains 481,000 32,000
Gross unrealized losses (9,077,000) (13,127,000)
Fair value $ 17,467,000 $ 40,380,000