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Note 16 - Employee Benefit Plans - Plan Asset Assumptions (Details)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Obligation [Member]      
Rate of compensation increase 3.60% 3.70% 3.30%
Obligation [Member] | Minimum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 0.38% 1.90% 1.50%
Obligation [Member] | Maximum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 4.40% 4.00% 4.00%
Cost [Member]      
Rate of compensation increase 3.70% 3.30% 3.75%
Cost [Member] | Minimum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 0.43% 1.50% 2.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 2.55% 3.75% 3.90%
Cost [Member] | Maximum [Member]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 4.00% 4.00% 4.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 7.00% 7.10% 7.10%