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Note 7 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

September 30, 2022

  

December 31, 2021

 

(in thousands)

 

Level 1

  

Level 2

  

Level 3

  

Level 1

  

Level 2

  

Level 3

 

Financial Assets:

                        

Cash

 $36,813  $-  $-  $65,637  $-  $- 

Money market mutual fund

  22,548   -   -   292   -   - 

Marketable securities

  17,096   37,414   -   7,602   18,318   - 

Total

 $76,457  $37,414  $-  $73,531  $18,318  $-