Note 8 - Income Taxes - The Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 1,501	$ 4,262	$ 2,451
State	304	673	292
Foreign	1,116	2,718	886
	2,921	7,653	3,629
Deferred:
Federal	538	(1,512)	(268)
State	144	(145)	390
Foreign	142	(495)	178
	824	(2,152)	300
Provision for income taxes	$ 3,745	$ 5,501	$ 3,929