Note 3 - Earnings Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity Option [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)		116	121	116	121
Restricted Stock [Member]
Anti-dilutive options not included in diluted earnings per share calculation (in shares)			8	41	30
Net income		$ 1,556	$ 2,390	$ 596	$ 4,191	$ 8,586
Less: Preferred stock dividends			50		100
Net income available to common shareholders		$ 1,556	$ 2,340	$ 596	$ 4,091
Weighted average shares - basic (in shares)		13,367	13,338	13,364	13,320
Potentially dilutive common shares (in shares)	[1]	58	32	44	33
Weighted average number of common shares outstanding - diluted (in shares)		13,425	13,370	13,408	13,353
Earnings per share - basic (in dollars per share)		$ 0.11	$ 0.18	$ 0.04	$ 0.31
Earnings per share - diluted (in dollars per share)		$ 0.11	$ 0.18	$ 0.04	$ 0.31

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