Note 12 - Retirement, Savings and Deferred Compensation Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Prior service cost	$ 303	$ 334
Net loss	(2,203)	(2,216)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (1,900)	$ (1,882)

Note 12 - Retirement, Savings and Deferred Compensation Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Supplemental Employee Retirement Plan [Member] - USD ($)
$ in Thousands

Mar. 31, 2023

Dec. 31, 2022

$ 303

$ 334

Net loss

(2,203)

(2,216)

Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax

$ (1,900)

$ (1,882)