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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Cash flows from operating activities:      
Net loss $ (29,684) $ (38,883) $ (35,319)
Adjustments to reconcile net loss to net cash used in operating activities:      
Share-based compensation 3,157 2,908 2,226
Income from equity investment 0 0 (46)
(Gain) Loss from change in fair value of embedded derivatives (23) (126) 1,359
Make whole derivative expense 0 8,347 0
Depreciation 4,099 4,384 4,097
Amortization of convertible note discount and non-cash interest expense 1,830 2,140 2,480
Foreign Currency Transaction Gains (2,075) (571) (443)
Other non-cash transactions 412 146 61
(Increase) decrease in operating assets:      
Accounts receivable 3,173 (15,378) (12,000)
Inventories (10,100) 1,059 (5,901)
Project assets (11,398) 0 0
Other assets 1,022 3,417 6,076
Increase (decrease) in operating liabilities:      
Accounts payable (7,224) (1,566) 11,776
Accrued liabilities 6,435 (11,056) (172)
Deferred revenue (3,898) (12,289) 9,148
Net cash used in operating activities (44,274) (57,468) (16,658)
Cash flows from investing activities:      
Capital expenditures (6,930) (6,295) (6,551)
Expenditures for long-term project assets 0 (784) 0
Cash acquired from acquisition 0 0 357
Net cash used in provided by investing activities (6,930) (7,079) (6,194)
Cash flows from financing activities:      
Repayment of debt (1,535) (5,971) (374)
Proceeds from debt 6,763 250 45,250
Financing costs for convertible debt securities 0 0 (2,472)
(Increase) decrease in restricted cash and cash equivalents (1,765) (15,120) 632
Proceeds from sale of common stock, net of registration fees 27,060 105,844 5,040
Payment of preferred dividends and return of capital (4,202) (4,343) (4,442)
Common stock issued for stock plans and related expenses 133 161 0
Net cash provided by financing activities 26,454 80,821 43,634
Effects on cash from changes in foreign currency rates (108) (260) 35
Net increase in cash and cash equivalents (24,858) 16,014 20,817
Cash and cash equivalents-beginning of period 83,710 67,696 46,879
Cash and cash equivalents-end of period $ 58,852 $ 83,710 $ 67,696