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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Cash flows from operating activities:    
Net loss $ (20,779) $ (33,993)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation 2,317 2,182
Gain from change in fair value of embedded derivatives (36) (116)
Make whole derivative expense 0 8,347
Depreciation 2,998 3,297
Interest expense on preferred stock obligation 1,392 1,466
Unrealized foreign exchange gains (1,807) (199)
Other non-cash transactions, net (182) 270
Decrease (increase) in operating assets:    
Accounts receivable 9,039 9,517
Inventories (19,676) 424
Project assets (10,855) 0
Other assets (2,966) 1,599
Increase (decrease) in operating liabilities:    
Accounts payable (3,762) (8,618)
Accrued liabilities 4,545 (11,485)
Deferred revenue 4,291 (4,293)
Net cash used in operating activities (35,481) (31,602)
Cash flows from investing activities:    
Capital expenditures (3,840) (4,120)
Net cash used in investing activities (3,840) (4,120)
Cash flows from financing activities:    
Repayment of debt (1,386) (5,858)
Proceeds from debt 6,326 250
Increase in restricted cash and cash equivalents (2,445) (15,120)
Payment of preferred dividends and return of capital (3,154) (3,264)
Proceeds from Issuance of Common Stock Issued for Stock Plans and Related Expenses 133 161
Proceeds from sale of common stock, net of registration fees 22,061 99,728
Net cash provided by financing activities 21,535 75,897
Effects on cash from changes in foreign currency rates (404) 67
Net (decrease) increase in cash and cash equivalents (18,190) 40,242
Cash and cash equivalents-beginning of period 83,710 67,696
Cash and cash equivalents-end of period 65,520 107,938
Supplemental cash flow disclosures:    
Cash interest paid 480 1,728
Noncash financing and investing activity:    
Common stock issued for Employee Stock Purchase Plan in settlement of prior year accrued employee contributions 168 106
Debt Conversion and Make Whole Obligation [Member]    
Noncash financing and investing activity:    
Stock Issued During Period, Value, Conversion of Convertible Securities $ 0 $ 46,186