XML 54 R34.htm IDEA: XBRL DOCUMENT v3.24.1
Note 9 - Fair Value (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
                 
     Quoted Prices  Realized Gains  Total Changes 
  Total Carrying  in Active  and (Losses)  in Fair Values 
  Amount in  Markets for  Included in  Included in 
  Consolidated  Identical  Current Period  Current Period 
  

Balance Sheet

  

Assets

  

Earnings (Loss)

  

Earnings (Loss)

 
                 

Marketable equity securities and U.S. Treasury trading securities at December 31, 2023

 $49,322,696  $49,322,696  $740,892  $4,411,489 
                 

Marketable equity securities and U.S. Treasury trading securities at December 31, 2022

 $42,289,339  $42,289,339  $(9,485,637) $(6,150,053)