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Stockholders' Equity
9 Months Ended
Jan. 31, 2013
Stockholders' Equity Attributable to Parent [Abstract]  
Stockholders' Equity Note Disclosure [Text Block]
STOCKHOLDERS' EQUITY

The changes in shares of common stock outstanding as of January 31 of each year are summarized as follows:

 
2013
2012
Balance, May 1
5,515,750

5,828,650

Restricted stock activity

(312,900
)
Treasury stock activity


Balance, January 31
5,515,750

5,515,750