Note 20 - Quarterly Financial Data (Unaudited) (Details) - Summary of Selected Quarterly Consolidated Financial Data - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2015
Interest income	$ 12,406	$ 11,370	$ 10,899	$ 10,761	$ 10,786	$ 10,401	$ 9,631	$ 9,655	$ 45,436	$ 40,473	$ 37,205
Interest expense	1,419	1,378	1,290	1,294	1,246	1,195	1,147	1,056	5,381	4,644	4,590
Net interest income	10,987	9,992	9,609	9,467	9,540	9,206	8,484	8,599	40,055	35,829	32,615
Provision for loan losses	500				300	300	300		500	900	4,935
Non-interest income	4,740	1,604	2,022	1,577	2,427	1,371	2,289	1,930	9,943	8,017	9,216
Non-interest expense	14,446	11,024	11,103	10,518	10,792	9,986	9,957	9,815	47,091	40,550	40,411
Benefit for income taxes	(9)	(10)	(5)	(2)	22	(6)	(21)	(41)	(26)	(46)	(35)
Net income	$ 790	$ 582	$ 533	$ 528	$ 853	$ 297	$ 537	$ 755	$ 2,433	$ 2,442	$ (3,480)
Net income per share:
Basic (in Dollars per share)	$ 0.02	$ 0.02	$ 0.01	$ 0.01	$ 0.02	$ 0.01	$ 0.02	$ 0.03	$ 0.06	$ 0.07	$ (0.13)
Diluted (in Dollars per share)	$ 0.02	$ 0.02	$ 0.01	$ 0.01	$ 0.02	$ 0.01	$ 0.02	$ 0.03	$ 0.06	$ 0.07	$ (0.13)