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Note 11 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
UNITED STATES        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 2,386 2,473 4,772 4,946
Expected return on plan assets (2,641) (2,779) (5,282) (5,558)
Recognized net actuarial loss 1,055 951 2,111 1,902
Amortization of prior service cost 0 0 0 0
Net periodic (benefit) cost 800 645 1,601 1,290
Foreign Plan [Member]        
Service cost 62 40 125 81
Interest cost 302 292 608 589
Expected return on plan assets (343) (346) (690) (699)
Recognized net actuarial loss 0 (150) 0 (302)
Amortization of prior service cost (1) (1) (2) (2)
Net periodic (benefit) cost $ 20 $ (165) $ 41 $ (333)