Note 12 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
UNITED STATES
Service cost	$ 1	$ 1
Interest cost	2,586	2,520
Expected return on plan assets	(3,385)	(3,354)
Recognized net actuarial loss	1,030	1,145
Amortization of prior service cost
Net periodic benefit cost	232	312
Foreign Plan [Member]
Service cost	9	9
Interest cost	254	254
Expected return on plan assets	(228)	(231)
Recognized net actuarial loss	86	229
Amortization of prior service cost		(8)
Net periodic benefit cost	$ 121	$ 253