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Note 8 - Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
   

March 31, 2022

 
   

Carrying

   

Fair Value Measured Using

   

Fair

 

(In thousands)

 

Amount

   

Level 1

   

Level 2

   

Level 3

   

Value

 

Available-for-Sale Securities

                                       

Mutual Funds - Corporate & Government Debt

  $ 19,487     $ 19,487     $     $     $ 19,487  

ETFs - Corporate & Government Debt

    7,093       7,093                   7,093  

Total

  $ 26,580     $ 26,580     $     $     $ 26,580  
   

June 30, 2021

 
   

Carrying

   

Fair Value Measured Using

   

Fair

 

(In thousands)

 

Amount

   

Level 1

   

Level 2

   

Level 3

   

Value

 

Available-for-Sale Securities

                                       

Mutual Funds - Corporate & Government Debt

  $ 19,985     $ 19,985     $     $     $ 19,985  

ETFs - Corporate & Government Debt

    7,366       7,366                   7,366  

Total

  $ 27,351     $ 27,351     $     $     $ 27,351