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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, 2022	Dec. 31, 2021
Opening balance	$ 212,688	$ 203,630
Ending balance	123,840	212,688
Fair Value, Inputs, Level 3 [Member]
Opening balance	360	292
Actual return on plan assets	6	5
Exchange differences	(6)	33
Contributions from the sponsoring companies	23	30
Ending balance	$ 383	$ 360

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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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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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+ References

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- 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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