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Note 4 - Fair Value Measurement: (Tables)
6 Months Ended
Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Description of Assets / Liabilities
 
Total
Fair Value
   
Quoted Price in
Active Markets for
Identical Assets
(Level 1)
   
Significant Other
Observable Inputs
(Level 2)
   
Significant
Unobservable
Inputs
(Level 3)
 
                         
As of December 31, 2012
                       
Corporate debt securities
  $ 54,413     $ -     $ 54,413     $ -  
Securities of state and political subdivisions
    441       -       441       -  
Mutual fund investments
    1,400       1,400       -       -  
Equity investment
    569       569       -       -  
    $ 56,823     $ 1,969     $ 54,854     $ -  
                                 
As of June 30, 2012
                               
Corporate debt securities
  $ 61,174     $ -     $ 61,174     $ -  
Securities of state and political subdivisions
    443       -       443       -  
Mutual fund investments
    1,423       1,423       -       -  
Equity investment
    557       557       -       -  
    $ 63,597     $ 1,980     $ 61,617     $ -