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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	Oct. 31, 2012
Commitments and Contingencies (Textual) [Abstract]
Net of liability recovered, minimum	$ 0.7
Net of liability recovered, maximum	2.0
Accrued liability	$ 1.1

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.