Note 9 - Components of Net Periodic Pension Cost - Net Periodic Pension Cost (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	78	71	233	213
Expected return on plan assets	(237)	(213)	(711)	(639)
Net amortization	17	75	49	225
Total periodic pension income	$ (142)	$ (67)	$ (429)	$ (201)