Note 9 - Income Taxes - The Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 4,594	$ 1,501	$ 4,262
State	806	304	673
Foreign	1,064	1,116	2,718
Current Income Tax Expense (Benefit), Total	6,464	2,921	7,653
Deferred:
Federal	(397)	538	(1,512)
State	(48)	144	(145)
Foreign	117	142	(495)
Deferred Income Tax Expense (Benefit), Total	(328)	824	(2,152)
Provision for income taxes	$ 6,136	$ 3,745	$ 5,501