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Note 9 - Fair Value
9 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
NOTE
9.
     
FAIR VALUE
 
At
September 30, 2019
and
December 31, 2018
, our financial instruments included cash, cash equivalents, restricted cash, receivables, marketable equity securities, certain investments, accounts payable, and long-term debt. The carrying value of cash, cash equivalents, restricted cash, receivables, and accounts payable approximates fair value due to the short-term nature of the instruments. As our long-term debt was issued during the
third
 quarter of
2019,
its carrying value is considered to approximate fair value. If our debt was measured at fair value within our Consolidated Balance Sheets, it would have been classified as level
2
in the fair value hierarchy.
 
Marketable equity securities and U.S. Treasury securities available for sale are reported at fair values. Fair values for equity investments in private companies are
not
readily available, but are estimated to approximate fair value. Substantially all of the fair value is determined using observed prices of publicly traded securities, level
1
in the fair value hierarchy.
 
   
Total Carrying
   
Quoted Prices
     
 
 
 
Total Changes
 
   
Amount in
   
in Active
     
 
 
 
in Fair Values
 
   
Consolidated
   
Markets for
     
 
 
 
Included in
 
   
Balance Sheet
   
Identical
   
Trading Gaines
   
Current Period
 
   
September 30, 2019
   
Assets
   
and Losses
   
Earnings (Loss)
 
                                 
Marketable equity securities
  $
52,866,683
    $
52,866,683
    $
415,572
    $
2,925,116
 
                                 
Securities available for sale
   
75,095,227
     
75,095,227
     
14,902
     
(61,056
)
                                 
     
 
     
 
    $
430,474
    $
2,864,060