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Stockholders' Equity (Tables)
3 Months Ended
Jul. 31, 2013
Stockholders' Equity Attributable to Parent [Abstract]  
Schedule of Stock by Class [Table Text Block]
 
2013
2012
Balance, May 1
5,265,750

5,515,750

Restricted stock activity
400,000


Balance, July 31
5,665,750

5,515,750