Note 9 - Components of Net Periodic Pension Cost - Net Periodic Pension Cost (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Service cost	$ 0	$ 0
Interest cost	110	78
Expected return on plan assets	(209)	(237)
Net amortization	74	16
Total periodic pension income	$ (25)	$ (143)