Note 11 - Benefit Plans - Investment Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Define Benefit Plan, Investment Assets	$ 10,175	$ 10,217
Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Define Benefit Plan, Investment Assets	1,584	1,516
Defined Benefit Plan, Equity Securities, US, Small to Mid Cap [Member]
Define Benefit Plan, Investment Assets	139	130
Defined Benefit Plan, Equity Securities, Non-US [Member]
Define Benefit Plan, Investment Assets	440	410
Defined Benefit Plan, Fixed Income [Member]
Define Benefit Plan, Investment Assets	8,012	8,161
Fair Value, Inputs, Level 1 [Member]
Define Benefit Plan, Investment Assets	10,175	10,217
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Define Benefit Plan, Investment Assets	1,584	1,516
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US, Small to Mid Cap [Member]
Define Benefit Plan, Investment Assets	139	130
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
Define Benefit Plan, Investment Assets	440	410
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Fixed Income [Member]
Define Benefit Plan, Investment Assets	8,012	8,161
Fair Value, Inputs, Level 2 [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US, Small to Mid Cap [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Fixed Income [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 3 [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Equity Securities, US, Small to Mid Cap [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
Define Benefit Plan, Investment Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Fixed Income [Member]
Define Benefit Plan, Investment Assets	$ 0	$ 0