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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Cash flows from operating activities:    
Net loss $ (25,322) $ (24,387)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation 1,619 1,517
(Income) loss from equity investment (46) 554
Depreciation 3,044 4,174
Interest expense on preferred stock obligations 1,495 1,536
Other non-cash transactions, net 361 (191)
Decrease (increase) in operating assets:    
Accounts receivable (3,270) 1,725
Inventories 3,051 (8,894)
Other assets (163) 2,147
Increase (decrease) in operating liabilities:    
Accounts payable 9,193 (3,052)
Accrued liabilities (2,668) (5,892)
Deferred revenue 14,817 (14,484)
Net cash provided by (used in) operating activities 2,111 (45,247)
Cash flows from investing activities:    
Capital expenditures (4,017) (2,646)
Cash acquired from acquisition 357 0
Treasury notes matured 0 12,000
Net cash (used in) provided by investing activities (3,660) 9,354
Cash flows from financing activities:    
Repayment of debt (285) (127)
Proceeds from debt 41,500 0
Proceeds received for sale of noncontrolling interest in subsidiary 0 954
Financing costs for convertible debt securities (2,472) 0
Decrease (increase) in restricted cash and cash equivalents 632 (2,871)
Payment of preferred dividends and return of capital (3,339) (6,506)
Proceeds from sale of common stock, net of registration fees (20) 64,003
Net cash provided by financing activities 36,016 55,453
Effects on cash from changes in foreign currency rates 13 (80)
Net increase in cash and cash equivalents 34,480 19,480
Cash and cash equivalents-beginning of period 46,879 42,983
Cash and cash equivalents-end of period 81,359 62,463
Supplemental cash flow disclosures:    
Cash interest paid 271 229
Noncash financing and investing activity:    
Common stock issued in settlement of prior year bonus obligation 0 550
Common stock issued for Employee Stock Purchase Plan in settlement of prior year accrued employee contributions 85 84
Common stock issued for acquisition $ 3,562 $ 0