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Note I - Stock-based Compensation - Options Exercised (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Options exercised (in shares) 112,250 224,500
Cash received from option exercises $ 2,849 $ 4,373
Intrinsic value of options exercised $ 6,861 $ 8,506