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Note 10 - Retirement Benefits (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
UNITED STATES
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 0.2		$ 0.2
UNITED STATES | Subsequent Event [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 5.5
UNITED KINGDOM | Foreign Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		0.9		0.9
GERMANY | Foreign Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		0.3		0.3
Pension Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		6.9		6.9
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 0.3	$ 0.3	$ 0.8	$ 1.0

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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