Note 10 - Fair Value of Financial Instruments - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financial Assets at Fair Value Option	$ 30,400		$ 30,400
Net loss from fair value adjustments	(378)	$ (987)
Financial Liabilities at Fair Value Option	34,500		34,000
Collateralized Mortgage Backed Securities [Member]
Financial Assets at Fair Value Option	1,898		2,016
Net loss from fair value adjustments	(7)	5
Other Securities [Member]
Financial Assets at Fair Value Option	28,526		28,429
Net loss from fair value adjustments	32	96
Borrowed Funds [Member]
Net loss from fair value adjustments	(570)	1,054
Financial Liabilities at Fair Value Option	34,536		$ 33,959
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Net loss from fair value adjustments	$ (545)	$ 1,155