Note 11 - Fair Value of Financial Instruments and Fair Value Measurements (Details) - Fair Value Measurement Using Significant Unobservable Inputs - Available-for-sale Securities [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, Beginning	$ 948	$ 941
Balance, Ending	943	948
Transfers out of Level 3	0	0
Loss on OTTI Impairment Included in Noninterest Income	0	0
Unrealized Gains included in Other Comprehensive Income (Loss)	$ (5)	$ 7