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Note 2 - Basis of Presentation - Summary of Basic and Diluted Net Income Per Share Calculations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic shares (in shares)	6,158,399	6,143,267
Dilutive shares (in shares)	320,500	272,550
Diluted shares (in shares)	6,478,899	6,415,817
Net income	$ 404	$ 317
Basic net income per share (in dollars per share)	$ 0.07	$ 0.05
Diluted net income per share (in dollars per share)	$ 0.06	$ 0.05

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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