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Note 6 - Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic earnings per share:
Net income attributable to Common shareholders	$ 1,013	$ 814	$ 3,547	$ 885
Weighted average shares outstanding (in shares)	3,894,237	3,958,718	3,893,702	3,957,343
Basic earnings per common share (in dollars per share)	$ 0.26	$ 0.21	$ 0.91	$ 0.22
Diluted earnings per share:
Net income attributable to Common shareholders	$ 1,013	$ 814	$ 3,547	$ 885
Weighted average shares outstanding (in shares)	3,894,237	3,958,718	3,893,702	3,957,343
Effect of potentially dilutive restricted common shares (in shares)	9,193		4,854
Weighted average diluted shares outstanding (in shares)	3,903,430	3,958,718	3,898,556	3,957,343
Diluted earnings per common share (in dollars per share)	$ 0.26	$ 0.21	$ 0.91	$ 0.22

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