Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Tax Expense (Benefit)	$ 344	$ 536
Effective Income Tax Rate Reconciliation, Percent	3.20%	8.20%
Unrecognized Tax Benefits	$ 12,500		$ 12,100
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,800		2,700
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 300		$ 200