Note 11 - Benefits Plans - Net Period Benefit Cost (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Amortization of prior service cost	$ 150	$ 150
Pension Plan [Member]
Interest cost	487	461
Expected return on plan assets	(408)	(421)
Amortization of prior service cost	150	150
Net periodic benefit cost	$ 229	$ 190
Weighted-average assumptions used to determine net cost
Discount rate	5.45%	4.90%
Pension Plan [Member] | Weighted Average [Member]
Weighted-average assumptions used to determine net cost
Expected long-term return on plan assets	5.60%	5.30%