Note 29 - Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Net interest income	$ 10,869	$ 10,584	$ 10,175	$ 9,734	$ 9,434	$ 9,276	$ 9,217	$ 8,304	$ 41,362		$ 36,231		$ 33,770
Provision for loan and lease losses	450		300	200					950
Total income	1,282	1,076	995	1,471	1,260	990	412	824	4,824		3,486		3,183
Noninterest expense	7,891	7,357	7,726	7,990	7,825	7,156	7,643	9,876	30,964		32,500		24,905
Income before income taxes and equity in undistributed net income of subsidiaries	3,810	4,303	3,144	3,015	2,869	3,110	1,986	(748)	14,272		7,217		12,048
Income tax expense	3,803	1,427	935	763	572	744	430	212	6,928		1,958		3,462
Income available to common shareholders	$ 7	$ 2,876	$ 2,209	$ 2,252	$ 2,297	$ 2,366	$ 1,556	$ (960)	$ 7,344		$ 5,259		$ 8,295
Earnings per share - basic (in dollars per share)		$ 0.18	$ 0.15	$ 0.17	$ 0.17	$ 0.18	$ 0.11	$ (0.07)	$ 0.48		$ 0.39
Weighted average shares - basic (in shares)	16,195	16,191	15,014	13,416	13,370	13,369	13,367	13,360	15,207	[1]	13,367	[1]	13,331	[1]
Earnings per share - diluted (in dollars per share)		$ 0.18	$ 0.15	$ 0.17	$ 0.17	$ 0.18	$ 0.11	$ (0.07)	$ 0.48		$ 0.39
Weighted average shares - diluted (in shares)	16,306	16,288	15,113	13,521	13,476	13,439	13,425	13,403	15,310		13,425		13,365

[1] Excludes unvested restricted shares because they do not have dividend or voting rights.