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Note I - Stock-based Compensation - Options Exercised (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Options exercised (in shares) 36,500 22,000
Cash received from option exercises $ 251 $ 1,166
Intrinsic value of options exercised $ 3,565 $ 793