Note 12 - Retirement Benefits - Contributions to Defined Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Contributions to defined benefit plans	$ 252	$ 277	$ 751	$ 808
Remaining contributions to be made	579		579
UNITED STATES
Contributions to defined benefit plans	56	67	169	194
Remaining contributions to be made	56		56
UNITED KINGDOM
Contributions to defined benefit plans	196	210	582	614
Remaining contributions to be made	184		184
GERMANY
Contributions to defined benefit plans
Remaining contributions to be made	274		274
IRELAND
Contributions to defined benefit plans
Remaining contributions to be made	$ 65		$ 65