Note 9 - Earnings Per Common Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016		Jun. 30, 2017	Jun. 30, 2016
Convertible preferred stock (in dollars per share)			[1]		$ (0.08)	[1]
Dilutive stock options (in shares)	21,235	9,056		21,235	9,056
Earnings per common share, diluted (in shares)	5,789,905	5,780,122	[1]	5,787,276	5,776,832	[1]
Earnings per common share, diluted	$ 434	$ 20		$ 1,199	$ 617
Earnings per common share, diluted (in dollars per share)	$ 0.08	$ 0	[1]	$ 0.21	$ 0.11	[1]
Earnings per common share, basic (in shares)	5,768,670	3,557,763	[1]	5,766,041	3,529,605	[1]
Earnings per common share, basic	$ 434	$ 20		$ 1,199	$ 617
Earnings per common share, basic (in dollars per share)	$ 0.08	$ 0	[1]	$ 0.21	$ 0.17	[1]
Series C Preferred Stock Dividends		$ 204			$ 408
Convertible preferred stock (in shares)		2,213,303	[1]		2,238,171	[1]

[1] Restated for 4% common stock dividend distributed July 11, 2016.