Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended				6 Months Ended
	Oct. 31, 2014		Oct. 31, 2013		Oct. 31, 2014		Oct. 31, 2013
Diluted	$ 0.04	[1]	$ 0.13	[1]	$ 0.10	[1]	$ 0.19	[1]
Class B Common Shares
Diluted	$ 0.04		$ 0.13		$ 0.10		$ 0.19

[1] Basic per share amounts are the same for Class A and Class B shares. Diluted per share amounts for Class A shares are shown above. Diluted earnings per share for Class B shares under the two-class method are $0.04 and $0.13 for the three months ended October 31, 2014 and 2013 and $0.10 and $0.19 for the six months ended October 31, 2014 and 2013, respectively. See Note D to the Condensed Consolidated Financial Statements.