Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Expense (Benefit), Total	$ (1,123)	$ 621
Effective Income Tax Rate Reconciliation, Percent, Total	4.50%	2.80%
GILTI Income	$ 15,500	$ 12,400