Note 1 - Description of Business and Interim Basis of Presentation (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Jul. 31, 2012
Prior Period Reclassification Adjustment (in Dollars)	$ 3.2

The amount of a reclassification adjustment made to prior period financial statement amounts.

No definition available.

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration