Note 3 - Earnings Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Equity Option [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)		74	121	111	121
Restricted Stock [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)				41	30
Net income		$ 2,366	$ 2,525	$ 2,962	$ 6,716	$ 8,586
Less: Preferred stock dividends			50		150
Net income available to common shareholders		$ 2,366	$ 2,475	$ 2,962	$ 6,566
Weighted average shares - basic (in shares)		13,369	13,340	13,366	13,327
Potentially dilutive common shares (in shares)	[1]	70	37	46	31
Weighted average number of common shares outstanding - diluted (in shares)		13,439	13,377	13,412	13,358
Earnings per share - basic (in dollars per share)		$ 0.18	$ 0.18	$ 0.22	$ 0.49
Earnings per share - diluted (in dollars per share)		$ 0.18	$ 0.18	$ 0.22	$ 0.49

[1] Represents the effects of the assumed exercise of stock options and vesting of non-participating restricted shares.