Statements of Operations (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Income Statement [Abstract]
Related party purchases (approximate ammounts)	$ 68,000,000	$ 37,000,000	$ 18,500,000	$ 15,300,000