Note 12 - Retirement Benefits - Contributions to Defined Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Contributions to defined benefit plans	$ 240	$ 251
Remaining contributions to be made	5,009
UNITED STATES | Funded Plan [Member]
Contributions to defined benefit plans	0	0
Remaining contributions to be made	4,348
UNITED STATES | Unfunded Plan [Member]
Contributions to defined benefit plans	56	56
Remaining contributions to be made	160
UNITED KINGDOM
Contributions to defined benefit plans	184	195
Remaining contributions to be made	185
GERMANY | Unfunded Plan [Member]
Contributions to defined benefit plans	0	0
Remaining contributions to be made	254
IRELAND
Contributions to defined benefit plans	0	$ 0
Remaining contributions to be made	$ 62