Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized holding gain (loss) on available for sale securities, tax	$ 1,394	$ 919	$ (334)	$ 4,264
Reclassification adjustment, tax	$ (1)	$ (1)	$ (2)	$ (2)