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Note H - Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 1,387	$ 2,283
Basic (in shares)	6,168	6,399
Dilutive effect of common stock equivalents (in shares)	96	26
Diluted weighted average common shares outstanding (in shares)	6,264	6,425
Basic (in dollars per share)	$ 0.22	$ 0.36
Diluted (in dollars per share)	$ 0.22	$ 0.36

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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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