Note 11 - Income Taxes - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 10,486	$ 25,201	$ 21,167
State	(80)
International	8,247	5,674	10,491
Total current	18,653	30,875	31,658
Deferred:
Federal	(1,420)	7,615	8,350
State	(656)
International	19	(429)	206
Total deferred	(2,057)	7,186	8,556
Total income tax expense	$ 16,596	$ 38,061	$ 40,214