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Note 4 - Investments
9 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
4.
Investments
 
As of
September 30, 2019
and
December 31, 2018,
investments totaled
$348,000
and
$258,000,
respectively, which consisted of equity securities.
No
marketable securities were sold during the
three
months ended
September 30, 2019,
and
20,000
shares were sold during the
three
months ended
September 30, 2018.
The total loss on marketable securities during the
three
months ended
September 30, 2019
was
$387,000,
and the unrealized gain on marketable securities during the
three
months ended
September 30, 2018
was
$25,000.
The loss for the
three
months ended
September 30, 2019
was due to an unrealized loss of
$387,000.
Certain marketable securities were sold during the
nine
months ended
September 30, 2019
and
September 30, 2018.
The total gain on marketable securities during the
nine
months ended
September 30, 2019
was
$223,000
and the unrealized loss on marketable securities during the
nine
months ended
September 30, 2018
was
$40,000.
The gain for the
nine
months ended
September 30, 2019
was due to an unrealized gain of
$168,000
and a realized gain of
$55,000.
The gain for the
nine
months ended
September 30, 2018
was due to an unrealized loss of
$43,000
and a realized gain of
$3,000.