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Note K - Stock-based Compensation Plans - Options Exercised (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Options Exercised (in shares)	323,000	264,500	30,750
Cash Received from Options Exercised	$ 2,832	$ 2,609	$ 400
Intrinsic Value of Options Exercised	$ 8,381	$ 6,439	$ 943

X

- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

+ References

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X

- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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- Definition

Number of share options (or share units) exercised during the current period.

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