Note 5 - Income Taxes - Summary of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal	$ 2,507	$ 3,016	$ (214)
State	101	114	(55)
Foreign	898
Total Current	3,506	3,130	(269)
Federal	(1,326)	279	544
State	(124)	(111)	(439)
Foreign
Total Deffered	(1,450)	168	105
Income Tax Provision	$ 2,056	$ 3,298	$ (164)