Note 7 - Pension and Post-retirement Benefits (Details Textual) - USD ($) $ in Millions	6 Months Ended	9 Months Ended
	Dec. 31, 2016	Mar. 31, 2017	Dec. 30, 2016
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 1.1
Pension Plan [Member]
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	$ 6.9
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.31%		3.77%
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 4.2
Pension Plan [Member] | Domestic Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer		3.5
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 0.8