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Note 10 - Income Taxes - Reconciliation of Effective Tax Rate (Details)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Provision at statutory tax rate 28.00% 35.00% 35.00%
State taxes 1.50% (0.10%) (0.50%)
Impact of foreign operations (0.90%) (8.00%) (6.70%)
Federal tax credits (1.20%) (1.30%) (1.80%)
Tax Reform 16.70% 0.00% 0.00%
Cash repatriation 9.50% 0.00% 0.00%
Contributions, net 0.00% 0.00% (1.30%)
Other (1.00%) (0.80%) (0.90%)
Effective Income Tax Rate Reconciliation, Percent, Total 52.60% 24.80% 23.80%