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Note 3 - Investments
12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
3.
       
Investments
 
As of
December 31, 2018
and
2017,
investments totaled
$258,000
and
$343,000,
respectively, which consisted of marketable securities. Certain marketable securities were sold during the year ended
December 31, 2018.
No
marketable securities were sold during the year ended
December 31, 2017.
The total loss on marketable securities during the year ended
December 31, 2018
was
$50,000.
The loss was due to an unrealized loss of
$57,000
partially offset by a realized gain of
$7,000.
The change in unrealized loss of
$254,000
in the statements of comprehensive income is presented net of tax for the year ended
December 31, 2017.
The tax benefit on the unrealized loss was
$10,000
in
2017.