Stockholders' Equity Schedule of Stock by Class (Details) (Common Stock [Member])	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Common Stock [Member]
Class of Stock [Line Items]
Common Stock Outstanding at May 1	5,515,750	5,828,650
Restricted Stock Activity	0	0
Treasury Stock Activity	0	0
Common Stock Outstanding at April 30	5,515,750	5,828,650