Note 9 - Components of Net Periodic Pension Cost - Net Periodic Pension Cost (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Service cost	$ 0	$ 0
Interest cost	106	110
Expected return on plan assets	(214)	(209)
Net amortization	43	74
Total periodic pension income	$ (65)	$ (25)