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Note 5 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

June 30, 2024

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $196,313  $-  $-  $196,313 
  

December 31, 2023

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $631,258  $-  $-  $631,258