Segment Disclosure (Narrative) (Details)	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Segment Disclosure
Number of reportable operating segments	1	1	1	1
Number of major customers	1	1	1	1
Percentage of revenues contributed by major customers	10.50%	10.90%	10.50%	10.90%