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Note 4 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

June 30,

   

Active
Markets
for Identical
Assets

   

Significant
Other
Observable
Inputs

   

Significant
Unobservable
Inputs

   

Amortized

 
   

2024

   

(Level 1)

   

(Level 2)

   

(Level 3)

   

Cost

 

Cash equivalents:

                                       

Money Market Funds

  $ 47,932     $ 47,932     $ -     $ -     $ 47,932  
   

December 31,

   

Active
Markets
for Identical
Assets

   

Significant
Other
Observable
Inputs

   

Significant
Unobservable
Inputs

   

Amortized

 
   

2023

   

(Level 1)

   

(Level 2)

   

(Level 3)

   

Cost

 

Cash equivalents:

                                       

Money Market Funds

  $ 55,485     $ 55,485     $ -     $ -     $ 55,485