Common Shares

6 Months Ended

Oct. 31, 2012

Common Shares [Abstract]

Common Shares

Note 7: Common Shares

The following table sets forth common share information.

	October 31, 2012	April 30, 2012
Common shares authorized	150,000,000	150,000,000
Common shares outstanding	108,458,847	110,284,715
Treasury shares	20,146,318	18,320,450