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

March 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

  19,028   19,028         19,028 

ETFs - Corporate & Government Debt

  6,977   6,977         6,977 

Time deposits: 91-360 days

  3,709      3,709      3,709 

Total Available-for-Sale Investments

 $29,714  $26,005  $3,709  $  $29,714 
  

June 30, 2022

 
  

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

  19,191   19,191         19,191 

ETFs - Corporate & Government Debt

  6,982   6,982         6,982 

Total Available-for-Sale Investments

 $26,173  $26,173  $  $  $26,173