Commitments and Contingencies Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	$ 123		$ 123
Operating Leases, Future Minimum Payments Due, Next Twelve Months	409		409
Operating Leases, Future Minimum Payments, Due in Two Years	227		227
Operating Leases, Future Minimum Payments, Due in Three Years	13		13
Operating Leases, Future Minimum Payments, Due in Four Years	0		0
Operating Leases, Future Minimum Payments Due	772		772
Operating Leases, Rent Expense, Net	128	98	373	292
Facilties Leases
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	122		122
Operating Leases, Future Minimum Payments Due, Next Twelve Months	406		406
Operating Leases, Future Minimum Payments, Due in Two Years	227		227
Operating Leases, Future Minimum Payments, Due in Three Years	13		13
Operating Leases, Future Minimum Payments, Due in Four Years	0		0
Operating Leases, Future Minimum Payments Due	768		768
Equipment Leases
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	1		1
Operating Leases, Future Minimum Payments Due, Next Twelve Months	3		3
Operating Leases, Future Minimum Payments, Due in Two Years	0		0
Operating Leases, Future Minimum Payments, Due in Three Years	0		0
Operating Leases, Future Minimum Payments, Due in Four Years	0		0
Operating Leases, Future Minimum Payments Due	4		4
Hamburg, Germany
Operating Leased Assets [Line Items]
Number of Renewal Options - Lessee			2
Length of Renewal Option - Lessee			3 years
Operating Leases, Future Minimum Payments Due	371		371
Redwood City, California, Main
Operating Leased Assets [Line Items]
Number of Renewal Options - Lessee			2
Length of Renewal Option - Lessee			1 year
Operating Leases, Future Minimum Payments Due	172		172
Munich, Germany
Operating Leased Assets [Line Items]
Number of Renewal Options - Lessee			1
Length of Renewal Option - Lessee			2 years
Operating Leases, Future Minimum Payments Due	38		38
Redwood City, California, Expansion
Operating Leased Assets [Line Items]
Number of Renewal Options - Lessee			1
Length of Renewal Option - Lessee			1 year
Operating Leases, Future Minimum Payments Due	187		187
Cupertino, California
Operating Leased Assets [Line Items]
Number of Renewal Options - Lessee			0
Length of Renewal Option - Lessee			0 years
Operating Leases, Future Minimum Payments Due	$ 18		$ 18