Note 11 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
UNITED STATES
Service cost	$ 0	$ 0
Interest cost	2,473	2,397
Expected return on plan assets	(2,779)	(2,993)
Recognized net actuarial loss	951	953
Amortization of prior service cost	0	0
Net periodic (benefit) cost	645	357
Foreign Plan [Member]
Service cost	41	44
Interest cost	297	262
Expected return on plan assets	(353)	(245)
Recognized net actuarial loss	(152)	(15)
Amortization of prior service cost	(1)	(1)
Net periodic (benefit) cost	$ (168)	$ 45