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Note 5 - Defined Benefit Plan - Defined Benefit Plan Activity (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Service cost	$ 261	$ 203	$ 783	$ 609
Interest cost	302	273	906	819
Expected return on plan assets	(608)	(518)	(1,824)	(1,553)
Recognized net actuarial loss	33	17	99	52
Net periodic benefit income	$ (12)	$ (25)	$ (36)	$ (73)

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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- Definition

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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