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Note 10 - Income Taxes - Reconciliation of Effective Tax Rate (Details)
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Provision at statutory tax rate 35.00% 35.00% 35.00%
State taxes (0.50%) 0.10% 0.00%
Impact of foreign operations (6.70%) (5.00%) (5.60%)
Federal tax credits (1.80%) (1.20%) (0.70%)
Life insurance proceeds 0.00% 0.00% (1.70%)
Contributions, net 1.30% 0.00% 0.00%
Other 0.90% (1.50%) (0.40%)
Effective income tax provision 23.80% 27.40% 26.60%