Subsequent Events (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Aug. 15, 2012	Jul. 31, 2012	Jul. 31, 2012 item	Jul. 31, 2011	Sep. 17, 2012	Aug. 14, 2012
Subsequent Events [Abstract]
Stock split, conversion ratio			0.125
Common stock, par value		$ 0.01	$ 0.01
Common stock par or stated value per share, after split		$ 0.01	$ 0.01
Common stock, net proceeds		$ 4,313,000	$ 3,818,000	$ 5,432,000
Common stock, shares outstanding						57.8
Shares outstanding, stock split	7.2
Underwritten Public Offering, Aggregate Number Of Shares					4,341,615
Common stock, issued		6,644,555	6,644,555	5,004,275
Common stock, public offering price per share		$ 1.10