Exploration Stage Company (Detail) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended				52 Months Ended
	Oct. 31, 2008	Jan. 31, 2013	Jan. 31, 2012	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009	Jan. 31, 2013
Operating loss since inception	$ (12)	$ (529,668)	$ (987,949)	$ (3,531,780)	$ (4,777,291)	$ (981,396)	$ (89,397)	$ (9,909,544)