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Note 8 - Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income attributable to Common shareholders	$ 1,036	$ 804	$ 2,101	$ 2,534
Weighted average shares outstanding (in shares)	3,903,858	3,894,128	3,902,195	3,893,431
Basic earnings per share (in dollars per share)	$ 0.27	$ 0.21	$ 0.54	$ 0.65
Net income attributable to Common shareholders	$ 1,036	$ 804	$ 2,101	$ 2,534
Effect of potentially dilutive restricted common shares (in shares)	13,603	7,400	17,943	5,289
Weighted average diluted shares outstanding (in shares)	3,917,461	3,901,528	3,920,138	3,898,720
Diluted earnings per share (in dollars per share)	$ 0.26	$ 0.21	$ 0.54	$ 0.65

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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