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INVESTMENTS IN MARKETABLE SECURITIES (Tables)
9 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Gain (Loss) on Securities
Net realized and unrealized gain (loss) from investments in marketable securities for the three and nine months ended September 30, 2021 and 2020 is summarized below: 
 
 
 
Three months ended
 
 
Nine months ended
 
 
 
September 30,
 
 
September 30,
 
Description
 
2021
 
 
2020
 
 
2021
 
 
2020
 
Net realized gain (loss) from sales of securities
 
$
83,000
 
 
$
(9,000
)
 
$
30,000
 
 
$
(80,000
)
Unrealized net gain (loss) of securities
 
 
6,000
 
 
 
128,000
 
 
 
250,000
 
 
 
(186,000
)
Total net gain (loss) from investments in marketable securities
 
$
89,000
 
 
$
119,000
 
 
$
280,000
$
(266,000
)