Income Taxes (Details 2)	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Income tax rate reconciliation:
Provision at statutory rate	35.00%	35.00%	35.00%
State taxes	(0.64%)	0.27%	(0.07%)
Foreign taxes	(5.09%)	2.32%	(4.56%)
Research and development credit	10.21%	11.03%	2.54%
Non-deductible compensation and other	(4.92%)	(3.96%)	(1.43%)
Valuation allowance	(41.48%)	(48.74%)	(32.07%)
Effective income tax rate	(6.92%)	(4.08%)	(0.59%)