Note 9 - Income Tax Expense (Benefit) - Deferred Income Tax Asset (Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Pension accruals	$ 3,513	$ 4,023
Operating reserves and other accruals	7,962	5,520
Book carrying value in excess of tax basis of intangibles	2,321	0
Capitalized research expenses	(1,704)	0
Tax credits	0	527
Book carrying value in excess of tax basis of property	(4,183)	(4,814)
Book carrying value in excess of tax basis of intangibles	0	(5,076)
Deferred expenses	(599)	(539)
Net deferred income tax asset	10,718	359
Net deferred income tax liability	$ (10,718)	$ (359)