Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Cash flows from operating activities:
Net loss	$ (89,107)	$ (77,568)	$ (47,334)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Share-based compensation	1,868	2,804	3,238
Depreciation and amortization	19,377	12,353	8,648
Change in fair value of common stock warrant liability	37,086	0	0
Gain on extinguishment of financing obligation	(1,801)	0	0
Gain on Series 1 preferred stock extinguishment	(475)	0	0
Non-cash interest expense on preferred stock and debt obligations	7,570	6,097	5,957
Deferred income taxes	0	0	(3,035)
Operating lease costs	1,451	0	0
Operating lease payments	(1,016)	0	0
Impairment of property, plant and equipment and project assets	2,417	20,360	0
Unrealized loss on derivative contract	314	624	0
Other non-cash transactions	674	511	597
Decrease (increase) in operating assets:
Accounts receivable	(6,271)	4,842	24,169
Unbilled receivables	(5,590)	(4,488)	24,562
Inventories	(2,111)	(6,427)	31,714
Other assets	(1,297)	2,120	(2,264)
Increase (decrease) in operating liabilities:
Accounts payable	(7,059)	(173)	(19,846)
Accrued liabilities	5,465	2,377	(11,345)
Deferred revenue	1,724	5,996	1,261
Net cash (used in) provided by operating activities	(36,781)	(30,572)	16,322
Cash flows from investing activities:
Capital expenditures	(382)	(2,151)	(10,028)
Project asset expenditures	(31,527)	(31,675)	(41,232)
Asset acquisition	(611)	(35,474)	0
Net cash used in investing activities	(32,520)	(69,300)	(51,260)
Cash flows from financing activities:
Repayment of debt	(30,117)	(48,395)	(16,616)
Proceeds from debt, net of debt discount	87,757	69,596	13,091
Common stock issued for stock plans and related expenses	5	23	0
Payment of deferred financing costs	(2,697)	(3,302)	(352)
Proceeds from sale of common stock and warrant exercises, net	173,194	43,573	10,455
Payment of preferred dividends and return of capital	(6,475)	(1,840)	(4,178)
Net cash provided by financing activities	221,667	59,655	27,717
Effects on cash from changes in foreign currency rates	(92)	(244)	12
Net increase (decrease) in cash, cash equivalents, and restricted cash	152,274	(40,461)	(7,209)
Cash, cash equivalents, and restricted cash-beginning of year	39,778	80,239	87,448
Cash, cash equivalents, and restricted cash-end of year	192,052	39,778	80,239
Series D Preferred Stock [Member]
Cash flows from financing activities:
Net proceeds from issuance of preferred shares	$ 0	$ 0	$ 25,317