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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, 2021	Mar. 31, 2020
Net income/(loss)	$ 11,949	$ (1,304)
Basic (in shares)	5,725	5,746
Dilutive effect of common stock equivalents (in shares)	26	0
Diluted weighted average common shares outstanding (in shares)	5,751	5,746
Basic (in dollars per share)	$ 2.09	$ (0.23)
Diluted (in dollars per share)	$ 2.08	$ (0.23)

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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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