INVESTMENTS IN MARKETABLE SECURITIES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Marketable Securities, Gain (Loss) [Abstract]
Net realized loss from sales of securities	$ (59,000)	$ (44,000)	$ (53,000)	$ (71,000)
Unrealized net gain (loss) of securities	188,000	528,000	245,000	(315,000)
Total net gain (loss) from investments in marketable securities	$ 128,899	$ 484,272	$ 191,842	$ (385,507)