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Note 8 - Fair Value Measurement (Tables)
6 Months Ended
Dec. 31, 2023
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
  

December 31, 2023

 
  

Carrying

  

Fair Value Measured Using

  

Fair

 

(In thousands)

 

Amount

  

Level 1

  

Level 2

  

Level 3

  

Value

 

Available-for-Sale Investments

                    

Short-Term Investments

                    

Mutual Funds - Corporate & Government Debt

  19,147   19,147         19,147 

ETFs - Corporate & Government Debt

  7,036   7,036         7,036 

Total Available-for-Sale Investments

 $26,183  $26,183  $  $  $26,183 
  

June 30, 2023

 
  

Carrying

  

Fair Value Measured Using

  

Fair

 

(In thousands)

 

Amount

  

Level 1

  

Level 2

  

Level 3

  

Value

 

Available-for-Sale Investments

                    

Short-Term Investments

                    

Mutual Funds - Corporate & Government Debt

  18,965   18,965         18,965 

ETFs - Corporate & Government Debt

  6,958   6,958         6,958 

Time deposits: 91-360 days

  1,996      1,996      1,996 

Total Available-for-Sale Investments

 $27,919  $25,923  $1,996  $  $27,919