Subsequent Events (Details) (USD $)	9 Months Ended		3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2012 Subsequent Event [Member]	Aug. 17, 2012 Subsequent Event [Member]
Subsequent Event [Line Items]
Assets Held-for-sale, Property, Plant and Equipment				$ 1,400,000
Proceeds from sale of assets	$ 1,426,000	$ 237,000	$ 1,400,000