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Note 2 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Assets

                

Money market accounts

 $15,811  $  $  $15,811 

Total Assets

 $15,811  $  $  $15,811 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Assets

                

Money market accounts

 $15,067  $  $  $15,067 

Total Assets

 $15,067  $  $  $15,067