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Note I - Stock-based Compensation - Options Exercised (Details) - USD ($)
$ in Thousands
6 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Options exercised (in shares) 220,750 113,000
Cash received from option exercises $ 4,294 $ 822
Intrinsic value of options exercised $ 8,317 $ 2,998