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MARKETABLE SECURITIES (Details) - Common Stock [Member] - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Net Investment Income [Line Items] |  |
Cost | $ 53,475,000 | $ 1,506,000
Gross unrealized gains | 32,000 | 1,083,000
Gross unrealized losses | (13,127,000) | (26,000)
Fair value | $ 40,380,000 | $ 2,563,000

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