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Note 2 - Basis of Presentation - Basic and Diluted Net Income Per Share (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 shares (in shares)	6,176,381	6,151,701	6,170,892	6,147,325
Dilutive shares (in shares)	320,501	272,550	320,501	272,550
Diluted shares (in shares)	6,496,882	6,424,251	6,491,393	6,419,875
Net income	$ 635	$ 550	$ 1,455	$ 1,329
Basic net income per share (in dollars per share)	$ 0.10	$ 0.09	$ 0.24	$ 0.22
Diluted net income per share (in dollars per share)	$ 0.10	$ 0.09	$ 0.22	$ 0.21

X

- 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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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