Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Apr. 30, 2014	Oct. 31, 2013
Concentration Risk [Line Items]
Number of customers each accounting for greater than 10% of net accounts receivable	2	2
Allowance for Doubtful Accounts [Abstract]
Allowance for doubtful accounts	$ 1.7	$ 2.0
Customer A and Customer B [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	22.80%	22.50%