Valuation and Qualifying Accounts and Reserves Concentration of Risk (Details) (Credit Concentration Risk [Member], USD $) In Thousands, unless otherwise specified	Jul. 31, 2012		Oct. 31, 2011
Customer A
Concentration Risk [Line Items]
Fair Value, Concentration of Risk, Accounts Receivable	$ 276		$ 0	[1]
Customer B
Concentration Risk [Line Items]
Fair Value, Concentration of Risk, Accounts Receivable	204		0	[1]
Customer C
Concentration Risk [Line Items]
Fair Value, Concentration of Risk, Accounts Receivable	0	[1]	362
Customer D
Concentration Risk [Line Items]
Fair Value, Concentration of Risk, Accounts Receivable	0	[1]	311
Customer E
Concentration Risk [Line Items]
Fair Value, Concentration of Risk, Accounts Receivable	$ 0	[1]	$ 225

[1] not in excess of 10% of trade accounts receivable