Note 12 - Employee Retirement Programs (Details Textual) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 3.4 | $ 3.5 | $ 3.4 |
| Other Postretirement Benefits Cost (Reversal of Cost) | $ 0.1 | $ 1.0 | $ 3.6 |