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Note 4 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

June 30, 2022

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $51,413  $-  $-  $51,413 

Other liabilities:

                

Fair value of contingent consideration

 $-  $-  $-  $- 
  

December 31, 2021

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash equivalents:

                

Money market funds

 $1,600,663  $-  $-  $1,660,663 

Other liabilities:

                

Fair value of contingent consideration

 $-  $-  $930,000  $930,000 

Fair value of contingent consideration:

    

December 31, 2021

 $930,000 

Change in fair value

  12,609 

March 31, 2022

  942,609 

Change in fair value

  (942,609)

June 30, 2022

 $-