Note 11 - Income Tax Expense - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statutory federal income tax rate	21.00%	21.00%
State and local income taxes, net of federal income tax benefit	4.50%	2.50%
Rate impacts due to foreign operations	(9.40%)	(12.80%)
Compensation related	1.90%	2.10%
General business credits	(3.40%)	(3.10%)
Other	1.40%	0.50%
Effective income tax rate	16.00%	10.20%