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Note 7 - Debt (Details) (USD $)
 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Note 7 - Debt (Details) [Line Items]    
Debt Instrument, Term 5 years  
Line of Credit Facility, Maximum Borrowing Capacity $ 225,000,000  
Line Of Credit Accordion Feature 100,000,000  
Line of Credit Facility, Remaining Borrowing Capacity 168,600,000  
Extraordinary and Certain Other Defined Items Excluded from Adjusted EBIT 2,000,000  
Interest Coverage Ratio, Actual 35.58  
Leverage Ratio, Actual 0.59  
Long-term Line of Credit 45,000,000 50,000,000
Swing Line Loan [Member]
    
Note 7 - Debt (Details) [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 10,000,000  
Letter of Credit [Member]
    
Note 7 - Debt (Details) [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 30,000,000  
Standby Letters of Credit [Member]
    
Note 7 - Debt (Details) [Line Items]    
Long-term Line of Credit $ 11,300,000 $ 10,700,000
Maximum [Member]
    
Note 7 - Debt (Details) [Line Items]    
Leverage Ratio, Requirement 3.5  
Minimum [Member]
    
Note 7 - Debt (Details) [Line Items]    
Interest Coverage Ratio, Requirement 3