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Note H - Income Per Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Net Income	$ 8,654	$ 8,301	$ 7,289	$ 1,387	$ 16,955	$ 8,676
Basic (in shares)	5,901		6,159		5,911	6,163
Dilutive effect of common stock equivalents (in shares)	48		70		51	94
Diluted weighted average common shares outstanding (in shares)	5,949		6,229		5,962	6,257
Basic (in dollars per share)	$ 1.47		$ 1.18		$ 2.87	$ 1.41
Diluted (in dollars per share)	$ 1.45		$ 1.17		$ 2.84	$ 1.39

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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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