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Note 19 - Post-retirement Benefits - Movements in Fair Value of Level 3 Assets (Details) - Pension Plan [Member] - UNITED KINGDOM - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Opening balance	$ 123,840	$ 212,688
Ending balance	137,725	123,840
Fair Value, Inputs, Level 3 [Member]
Opening balance	383	360
Actual return on plan assets	10	6
Exchange differences	(88)	(6)
Contributions from the sponsoring companies	32	23
Ending balance	$ 337	$ 383

X

- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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X

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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- Definition

Amount, measured using unobservable input, of increase in plan asset of defined benefit plan from purchase.

+ References

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X

- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan for exchange differences.

+ References

No definition available.

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