Note 10 - Income Taxes - Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
State tax credits	$ 424	$ 571
Unfunded pension liability	(255)	(416)
Reserves and accruals	4,504	4,947
Federal, state and foreign net operating loss and credit carryforwards	4,303	4,316
Depreciation	435	437
Amortization	6,004	2,968
Lease accounting	4,605	4,816
Other accruals	5,997	6,486
Total deferred tax assets	26,017	24,125
Depreciation	2,331	2,227
Amortization	6,359	6,178
Lease accounting	4,659	4,889
Other accruals	562	780
Total deferred tax liabilities	13,911	14,074
Valuation allowance	2,009	4,027
Net deferred tax assets	$ 10,097	$ 6,024