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Note 11 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2022
Sep. 30, 2021
UNITED STATES    
Service cost $ 0 $ 1
Interest cost 2,397 1,830
Expected return on plan assets (2,993) (3,260)
Recognized net actuarial loss 953 1,384
Amortization of prior service cost 0 0
Net periodic benefit cost 357 (45)
Foreign Plan [Member]    
Service cost 44 63
Interest cost 262 190
Expected return on plan assets (245) (211)
Recognized net actuarial loss (15) 84
Amortization of prior service cost (1) (1)
Net periodic benefit cost $ 45 $ 125