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Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value $ 41,431 $ 45,522
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 39,086 43,147
Corporate Debt Securities [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 39,086 43,147
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 435 436
US States and Political Subdivisions Debt Securities [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 435 436
Mutual Fund Investments [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 1,187 1,250
Mutual Fund Investments [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 1,187 1,250
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 723 689
Equity Securities [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 723 689
Fair Value, Inputs, Level 1 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value 1,910 1,939
Fair Value, Inputs, Level 2 [Member]
    
Note 4 - Fair Value Measurement: (Details) - Assets measured at fair value on a recurring basis: [Line Items]    
Fair Value $ 39,521 $ 43,583