Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Jul. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective tax rate (ETR)	4.90%	9.70%
Statutory income tax rate	35.00%
Current deferred tax liabilities	$ 20,000	$ 300,000
Less valuation allowance	968,000	1,107,000		1,000,000
Undistributed earnings of its foreign subsidiaries	1,400,000,000
Research credits	2,066,000	131,000	1,183,000
Changes in unrecognized tax benefits	5,300,000
Unrecognized tax benefits that would impact ETR	28,800,000
Interest and penalties	2,600,000
Unrecognized tax benefits related to tax positions	3,600,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,800,000
Federal net operating loss carryforwards related to share option exercises	4,000,000
Alternative minimum tax credits	6,600,000
Research credits	4,000,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	33,900,000
California [Member]
Operating Loss Carryforwards [Line Items]
Research credits	$ 500,000