Note 7 - Income Tax Expense - Income Tax Provisions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal	$ 12,997	$ 3,049	$ 3,613
State and local	1,956	1,074	643
Foreign	486	502	789
Current Income Tax Expense (Benefit), Total	15,439	4,625	5,045
Deferred tax (benefit) provision	(5,009)	(1,405)	(625)
Income tax expense	$ 10,430	$ 3,220	$ 4,420