Schedule of Available-for-sale Securities (Details) (USD $)	3 Months Ended	12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012
Available-for-sale Securities Schedule Of Available-for-sale Securities 1	$ 7,808
Available-for-sale Securities Schedule Of Available-for-sale Securities 2	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 3	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 4	33,684
Available-for-sale Securities Schedule Of Available-for-sale Securities 5	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 6	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 7	41,492
Available-for-sale Securities Schedule Of Available-for-sale Securities 8	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 9	0
Available-for-sale Securities Schedule Of Available-for-sale Securities 1		7,777
Available-for-sale Securities Schedule Of Available-for-sale Securities 2		0
Available-for-sale Securities Schedule Of Available-for-sale Securities 3		0
Available-for-sale Securities Schedule Of Available-for-sale Securities 4		34,196
Available-for-sale Securities Schedule Of Available-for-sale Securities 5		0
Available-for-sale Securities Schedule Of Available-for-sale Securities 6		0
Available-for-sale Securities Schedule Of Available-for-sale Securities 7		41,973
Available-for-sale Securities Schedule Of Available-for-sale Securities 8		0
Available-for-sale Securities Schedule Of Available-for-sale Securities 9		$ 0