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Note 10 - Fair Value Measurement (Tables)
3 Months Ended
Sep. 30, 2025
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
  

September 30, 2025

 
  

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

  6,693   6,693         6,693 

ETFs - Corporate & Government Debt

  4,597   4,597         4,597 

Total Available-for-Sale Investments

 $11,290  $11,290  $  $  $11,290 
  

June 30, 2025

 
  

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

  9,879   9,879         9,879 

ETFs - Corporate & Government Debt

  5,229   5,229         5,229 

Total Available-for-Sale Investments

 $15,108  $15,108  $  $  $15,108