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Condensed Consolidated Statement of Stockholders' Equity (Parenthetical)	3 Months Ended
	Jul. 31, 2018 $ / shares shares
Cash dividends paid, per share | $ / shares	$ 0.17
Stock options exercised, shares | shares	9,250
Additional Paid-in Capital [Member]
Stock options exercised, shares | shares	9,250
Retained Earnings [Member]
Cash dividends paid, per share | $ / shares	$ 0.17

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Aggregate dividends paid during the period for each share of common stock outstanding.

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