Note 10 - Benefit Plans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Deferred Compensation Liability, Current and Noncurrent, Total	$ 1,300	$ 1,900
Profit Sharing Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	0	0
Pension Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	481	385
Supplemental Executive Retirement Plan [Member]
Retirement Plan, Annual, Accrued Unfunded Contributions	370	387
Liability, Other Retirement Benefits	$ 1,500	$ 1,100