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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, 2024
Dec. 31, 2023
Opening balance $ 137,725 $ 123,840
Ending balance 132,216 137,725
Fair Value, Inputs, Level 3 [Member]    
Opening balance 337 383
Actual return on plan assets 11 10
Exchange differences (77) (88)
Contributions from the sponsoring companies 37 32
Ending balance $ 308 $ 337