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Note 16 - Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
UNITED STATES      
Service Cost $ 4 $ 3 $ 3
Interest Cost 7,439 9,083 10,342
Expected return on plan assets (13,012) (13,150) (13,541)
Recognized net actuarial loss 5,933 5,101 4,121
Amortization of prior service cost (benefit) 0 0 0
Net periodic benefit cost (benefit) 364 1,037 925
Foreign Plan [Member]      
Service Cost 217 236 189
Interest Cost 725 846 1,013
Expected return on plan assets (629) (868) (908)
Recognized net actuarial loss 757 651 340
Amortization of prior service cost (benefit) (5) (5) (3)
Net periodic benefit cost (benefit) $ 1,065 $ 860 $ 631