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Note 5 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

June 30, 2023

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $3,250  $-  $-  $3,250 

Contingent consideration receivable

  -   -   682,000   682,000 
  

December 31, 2022

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $58,242  $-  $-  $58,242 
Asset Acquisition, Contingent Consideration [Table Text Block]

Fair value of contingent consideration:

    

December 31, 2022

 $- 

Additions

  682,000 

March 31, 2023

  682,000 

Additions

  - 

June 30, 2023

 $682,000