Note 9 - Pension and Post-retirement Benefits (Details Textual) $ in Millions	3 Months Ended
Sep. 30, 2019 USD ($)
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 6.5
Pension Plan [Member] \| UNITED STATES
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	1.0
Pension Plan [Member] \| Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0.2

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year.

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