Exploration Stage Company (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended				58 Months Ended
	Oct. 31, 2008	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009	Jul. 31, 2013
Operating loss since inception	$ (12)	$ 369,351	$ (779,276)	$ (606,262)	$ (2,982,971)	$ (3,531,780)	$ (4,777,291)	$ (981,396)	$ (89,397)	$ (9,986,138)