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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
--- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Cash dividends paid, per share | $ 0.58 | $ 0.51 | $ 0.47
Stock options exercised, shares | 50,075 | 84,000 | 29,075
Treasury stock, shares |  |  | 1,159
Common Stock [Member] |  |  |
Stock options exercised, shares |  |  | 29,075
Additional Paid-in Capital [Member] |  |  |
Stock options exercised, shares | 50,075 | 84,000 | 29,075
Treasury Stock [Member] |  |  |
Stock options exercised, shares |  |  | 29,075
Treasury stock, shares |  |  | 1,159
Retained Earnings [Member] |  |  |
Cash dividends paid, per share | $ 0.58 | $ 0.51 | $ 0.47

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