Note 5 - Income Taxes - Summary of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal	$ 2,117	$ 2,507	$ 3,016
State	119	101	114
Foreign	1,122	898
Total Current	3,358	3,506	3,130
Federal	(168)	(1,326)	279
State	(121)	(124)	(111)
Foreign
Total Deffered	(289)	(1,450)	168
Income Tax Provision	$ 3,069	$ 2,056	$ 3,298