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Note 10 - Fair Value (As Restated) (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
            

Total Changes

 
  

Total Carrying

  

Quoted Prices

      

in Fair Values

 
  

Amount in

  

in Active

      

Included in

 
  Consolidated  Markets for  Realized Gains  Current Period 
  

Balance Sheet

  

Identical

  

and (Losses)

  

Earnings (Loss)

 
  

Dec. 31, 2020

  

Assets

  

(As Restated)

  

(As Restated)

 
                 

Marketable equity securities, U.S. Treasury trading securities, and corporate bonds

 $102,824,427  $102,824,427  $5,701,048  $(10,399,932)