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Note 4 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]

June 30, 2025

 

Fair Value

   

Level 1

   

Level 2

   

Level 3

 

Assets:

                               

Money market funds

  $ 200,000     $ 200,000     $ -     $ -  

December 31, 2024

 

Fair Value

   

Level 1

   

Level 2

   

Level 3

 

Assets:

                               

Money market funds

  $ 300,000     $ 300,000     $ -     $ -