Note 9 - Components of Net Periodic Pension Cost - Net Periodic Pension Cost (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	110	78	220	156
Expected return on plan assets	(209)	(237)	(419)	(474)
Net amortization	74	16	148	32
Total periodic pension income	$ (25)	$ (143)	$ (51)	$ (286)