Contingencies (Details)	9 Months Ended
	Jul. 31, 2011 Ontario Grant [Member] CAD	Jul. 31, 2011 Foreign Tax Contingencies [Member] USD ($)	Oct. 31, 2010 Foreign Tax Contingencies [Member] USD ($)
Contingencies (Textuals) [Abstract]
Grant amount	25,000,000
Annual disbursements	5,000,000
Benefit recorded to date	4,100,000
Grant period	November 1, 2010 to October 31, 2015
Accrued Liabilities related to contingencies		1,600,000	1,400,000
Estimation of possible losses		$ 5,800,000