Note 19 - Post-retirement Benefits - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Actuarial (loss) gain on defined benefit plans	$ (4,529)	$ 7,440	$ 22,345
Amortization of prior service credit	(702)	(249)	(249)
Pension Plan [Member] \| UNITED KINGDOM
Current service cost	(350)	(357)	(439)
Interest cost	(6,177)	(4,307)	(3,407)
Expected return on plan assets	6,977	6,796	5,499
Amortization of prior service credit	249	249	249
Reclassified net remeasurement (loss) gains	453	0	244
Amounts included in consolidated statements of operations	1,152	2,381	2,146
Actuarial (loss) gain on defined benefit plans	(4,529)	7,440	22,345
Amortization of prior service credit	(249)	(249)	(249)
Reclassified net remeasurement (loss) gains	(453)	0	(244)
Other comprehensive income (loss)	(5,231)	7,191	21,852
Total comprehensive income (loss)	$ (4,079)	$ 9,572	$ 23,998

Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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