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Note 12 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
UNITED STATES        
Service cost $ 0 $ 1 $ 0 $ 2
Interest cost 2,396 1,830 4,793 3,660
Expected return on plan assets (2,994) (3,259) (5,987) (6,519)
Recognized net actuarial loss 954 1,383 1,907 2,767
Amortization of prior service cost 0 0 0 0
Net periodic benefit cost 356 (45) 713 (90)
Foreign Plan [Member]        
Service cost 43 59 87 122
Interest cost 263 195 525 385
Expected return on plan assets (247) (217) (492) (428)
Recognized net actuarial loss (16) 86 (31) 170
Amortization of prior service cost (1) (1) (2) (2)
Net periodic benefit cost $ 42 $ 122 $ 87 $ 247