Condensed Consolidated Statements of Operations (Parenthetical) - $ / shares		3 Months Ended			9 Months Ended
		Jan. 31, 2017		Jan. 31, 2016	Jan. 31, 2017		Jan. 31, 2016
Diluted	[1]	$ 0.08		$ 0.07	$ 0.15		$ 0.24
Class B Common Shares
Diluted		$ 0.08	[2]	$ 0.07	$ 0.15	[2]	$ 0.24

[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 $0.08 and $0.07 for the three months ended January 31, 2017 and 2016, and $0.15 and $0.24 for the nine months ended January 31, 2017 and 2016, respectively. See Note D to the Condensed Consolidated Financial Statements.

[2] Amounts adjusted for rounding