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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, 2023
Mar. 31, 2022
Net income (loss) $ 5,231 $ 23,942
Basic weighted average common shares outstanding (in shares) 22,148 22,292
Dilutive effect of common stock equivalents (in shares) 169 191
Diluted weighted average common shares outstanding (in shares) 22,317 22,483
Basic earnings per share (in dollars per share) $ 0.24 $ 1.07
Diluted earnings per share (in dollars per share) $ 0.23 $ 1.06