Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Cash flows from operating activities
Net loss	$ (47,653)	$ (79,056)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of premium (discount) on marketable securities	(13)	0
Change in fair value of embedded redemption feature	980	(7,130)
Depreciation of equipment, furniture and fixtures, and amortization of leasehold improvements	14,721	14,543
Share-based compensation costs	8,888	9,864
Amortization of intangible assets	19,415	37,137
Deferred tax provision (benefit)	(49)	183
Provision for inventory excess and obsolescence	8,224	2,645
Provision for warranty	7,706	1,093
Other	2,667	851
Changes in assets and liabilities, net of effect of acquisition:
Accounts receivable	17,078	(26,451)
Inventories	(26,799)	(8,372)
Prepaid expenses and other	14,500	(5,095)
Accounts payable, accruals and other obligations	15,850	(4,300)
Deferred revenue	(22,634)	427
Net cash provided by (used in) operating activities	12,881	(63,661)
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(7,898)	(17,265)
Restricted cash	(866)	(3,505)
Proceeds from sale of cost method investment	524	0
Receipt of contingent consideration related to business acquisition	0	16,394
Net cash used in investing activities	(8,240)	(4,376)
Cash flows from financing activities:
Proceeds from issuance of common stock	5,669	5,275
Net cash provided by financing activities	5,669	5,275
Effect of exchange rate changes on cash and cash equivalents	(1,745)	(105)
Net increase (decrease) in cash and cash equivalents	10,310	(62,762)
Cash and cash equivalents at beginning of period	541,896	688,687
Cash and cash equivalents at end of period	550,461	625,820
Supplemental disclosure of cash flow information
Cash paid during the period for interest	2,458	2,458
Cash paid during the period for income taxes, net	2,823	1,698
Non-cash investing and financing activities
Purchase of equipment in accounts payable	7,409	3,815
Fixed assets acquired under capital leases	$ 3,078	$ 1,456