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MARKETABLE SECURITIES (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cost | $ 2,118,411 | $ 1,600,164 |
Common Stock [Member] |  |  |
Cost | 1,505,686 | 423,025 |
Gross unrealized gains (losses) | 1,083,532 | 216,622 |
Gross realized gains (losses) | (26,235) |  |
Fair value | $ 2,562,983 | $ 639,647 | $ 178,597

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