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Capital Stock and Changes in Capital Accounts
 12 Months Ended
Apr. 30, 2017
Capital Stock and Changes in Capital Accounts [Abstract]  
Capital Stock and Changes in Capital Accounts
Note 17 - Capital Stock and Changes in Capital Accounts
 
Each share of the Company’s Class B Common Stock is convertible into one share of Class A Common Stock. The holders of Class A stock are entitled to elect 30% of the entire Board of Directors and the holders of Class B stock are entitled to elect the remainder. On all other matters, each share of Class A stock is entitled to one tenth of one vote and each share of Class B stock is entitled to one vote.
 
During fiscal year 2017, the Board of Directors of the Company approved an additional share repurchase program of four million shares of Class A or B Common Stock and the Company repurchased 953,188 shares at an average price of $52.80 per share. As of April 30, 2017, the Company has authorization from its Board of Directors to purchase up to 3,793,648 additional shares.