Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Cash flows from operating activities:
Net loss	$ (10,815)	$ (11,879)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	621	509
Income from equity investment	0	(46)
Gain (loss) from change in fair value of embedded derivatives	225	(3)
Make whole derivative expense	2,422	0
Depreciation	1,068	1,012
Interest expense on preferred stock obligation	492	511
Other non-cash transactions, net	(696)	207
Decrease (increase) in operating assets:
Accounts receivable	15,227	17,020
Inventories	4,333	3,236
Other assets	2,530	(739)
Increase (decrease) in operating liabilities:
Accounts payable	(6,138)	(5,345)
Accrued liabilities	(11,151)	(1,026)
Deferred revenue	(2,742)	27,434
Net cash (used in) provided by operating activities	(5,074)	30,897
Cash flows from investing activities:
Capital expenditures	(790)	(1,397)
Cash acquired from acquisition	0	357
Net cash used in investing activities	(790)	(1,040)
Cash flows from financing activities:
Repayment of debt	(95)	(63)
Proceeds from debt	250	0
Increase in restricted cash and cash equivalents	(16,141)	(5,000)
Payment of preferred dividends and return of capital	(1,113)	(1,113)
Proceeds from sale of common stock, net of registration fees	33,755	0
Net cash provided by (used in) financing activities	16,656	(6,176)
Effects on cash from changes in foreign currency rates	(20)	76
Net increase in cash and cash equivalents	10,772	23,757
Cash and cash equivalents-beginning of period	67,696	46,879
Cash and cash equivalents-end of period	78,468	70,636
Supplemental cash flow disclosures:
Cash interest paid	1,535	55
Noncash financing and investing activity:
Common stock issued for Employee Stock Purchase Plan in settlement of prior year accrued employee contributions	106	85
Stock Issued During Period, Value, Conversion of Convertible Securities	12,960	0
Common stock issued for acquisition	0	3,562
Debt Conversion and Make Whole Obligation [Member]
Noncash financing and investing activity:
Stock Issued During Period, Value, Conversion of Convertible Securities	$ 17,200