Note 18 - Employee Benefit Plans - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair value of plan assets	$ 4,264	$ 5,045	$ 4,701	$ 5,915
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	1,218	2,197
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	3,046	2,848
Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	0	0
Defined Benefit Plan, Cash [Member]
Fair value of plan assets	1,218	1,042
Defined Benefit Plan, Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	1,218	1,042
Defined Benefit Plan, Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	0	0
Defined Benefit Plan, Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Government Sponsored Entities [Member]
Fair value of plan assets	1,532	469
Fixed Income Securities, Government Sponsored Entities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Government Sponsored Entities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	1,532	469
Fixed Income Securities, Government Sponsored Entities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Municipal Bonds and Notes [Member]
Fair value of plan assets	1,154	2,067
Fixed Income Securities, Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	1,154	2,067
Fixed Income Securities, Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Corporate Bonds and Notes [Member]
Fair value of plan assets	360	312
Fixed Income Securities, Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0	0
Fixed Income Securities, Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	360	312
Fixed Income Securities, Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	$ 0	0
Defined Benefit Plan, Equity Securities, US Companies [Member]
Fair value of plan assets		964
Defined Benefit Plan, Equity Securities, US Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		964
Defined Benefit Plan, Equity Securities, US Companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		0
Defined Benefit Plan, Equity Securities, US Companies [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		0
Defined Benefit Plan, Equity Securities, Foreign Companies [Member]
Fair value of plan assets		191
Defined Benefit Plan, Equity Securities, Foreign Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		191
Defined Benefit Plan, Equity Securities, Foreign Companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		0
Defined Benefit Plan, Equity Securities, Foreign Companies [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets		$ 0