Common Shares

3 Months Ended

Jul. 31, 2012

Common Shares [Abstract]

Common Shares

Note 7: Common Shares

The following table sets forth common share information.

	July 31, 2012		April 30, 2012
Common shares authorized		150,000,000		150,000,000
Common shares outstanding		110,438,142		110,284,715
Treasury shares		18,167,023		18,320,450