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Note 11 - Retirement Benefits - Contributions to Defined Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Contributions to defined benefit plans	$ 52	$ 4,828	$ 104	$ 4,880
Remaining contributions to be made	456		456
UNITED STATES | Defined Benefit Plan, Funded Plan [Member]
Contributions to defined benefit plans	0	4,776	0	4,776
Remaining contributions to be made	0		0
UNITED STATES | Defined Benefit Plan, Unfunded Plan [Member]
Contributions to defined benefit plans	52	52	104	104
Remaining contributions to be made	107		107
UNITED KINGDOM
Contributions to defined benefit plans	0	0	0	0
Remaining contributions to be made	0		0
GERMANY | Defined Benefit Plan, Unfunded Plan [Member]
Contributions to defined benefit plans	0	0	0	0
Remaining contributions to be made	283		283
IRELAND
Contributions to defined benefit plans	0	$ 0	0	$ 0
Remaining contributions to be made	$ 66		$ 66

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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X

- Definition

Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

+ References

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