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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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic shares (in shares)	6,195,801	6,173,544	6,192,117	6,168,446
Dilutive shares (in shares)	378,701	318,501	378,701	318,501
Diluted shares (in shares)	6,574,502	6,492,045	6,570,818	6,486,947
Net income	$ 359	$ 416	$ 773	$ 820
Basic net income per share (in dollars per share)	$ 0.06	$ 0.07	$ 0.13	$ 0.13
Diluted net income per share (in dollars per share)	$ 0.06	$ 0.06	$ 0.12	$ 0.13

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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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