Note 9 - Income Tax Expense (Benefit) - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Statutory federal income tax rate	21.00%	21.00%
State and local income taxes, net of federal income tax benefit	3.40%	1.40%
Rate impacts due to foreign operations	4.30%	(6.70%)
Changes in uncertain tax positions	0.00%	(0.50%)
Compensation related	(0.80%)	(1.60%)
Pension termination	(0.30%)	(1.80%)
R&D tax credits	0.70%	(0.40%)
Impairment charge	(11.70%)	0.00%
Other	(0.70%)	(0.30%)
Effective income tax rate	15.90%	11.10%