Note 18 - Employee Benefit Plans - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair value of plan assets	$ 4,344	$ 4,264	$ 5,045	$ 4,701
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	1,961
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	2,383
Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	0
Defined Benefit Plan, Cash [Member]
Fair value of plan assets	1,961	1,218
Defined Benefit Plan, Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	1,961	1,218
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	1,267	1,532
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	1,267	1,532
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	733	1,154
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	733	1,154
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	383	360
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	383	360
Fixed Income Securities, Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets	$ 0	$ 0