Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities:
Net loss	$ (37,078)	$ (17,357)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	1,940	1,378
Loss from change in fair value of embedded derivatives	26	45
Depreciation	4,398	4,302
Non-cash interest expense on preferred stock and debt obligations	2,575	2,845
Unrealized foreign exchange gains	(329)	(367)
Deferred income taxes	0	(3,035)
Impairment of property, plant and equipment	2,840	0
Project asset impairment	0	485
Other non-cash transactions, net	126	203
(Increase) decrease in operating assets:
Accounts receivable	(2,171)	25,798
Unbilled receivables	(3,490)	(1,419)
Inventories	(3,468)	30,981
Other assets	560	(1,382)
Increase (decrease) in operating liabilities:
Accounts payable	8,982	3,290
Accrued liabilities	2,228	(4,238)
Deferred revenue	4,664	386
Net cash (used in) provided by operating activities	(18,197)	41,915
Cash flows from investing activities:
Capital expenditures	(2,091)	(5,506)
Project asset expenditures	(27,275)	(21,749)
Net cash used in investing activities	(29,366)	(27,255)
Cash flows from financing activities:
Repayment of debt	(4,791)	(10,919)
Proceeds from debt	28,322	13,091
Payment of deferred financing costs	(1,283)	(352)
Payment of preferred dividends and return of capital	(1,840)	(2,096)
Common stock issued for stock plans and related expenses	31	0
Proceeds from sale of common stock and warrant exercises, net	0	3,268
Net cash provided by financing activities	20,439	2,992
Effects on cash from changes in foreign currency rates	(133)	87
Net (decrease) increase in cash, cash equivalents and restricted cash	(27,257)	17,739
Cash, cash equivalents and restricted cash-beginning of period	80,239	87,448
Cash, cash equivalents and restricted cash-end of period	52,982	105,187
Supplemental cash flow disclosures:
Cash interest paid	1,638	1,144
Noncash financing and investing activity:
Net noncash reclass of project assets to inventory	0	11,740
Accrued purchase of fixed assets, cash paid in subsequent period	35	273
Accrued purchase of project assets, cash paid in subsequent period	893	1,504
Series C Preferred Stock [Member]
Noncash financing and investing activity:
Series C preferred share conversions	12,329	15,598
Series C preferred share modification	6,047	0
Series D Preferred Stock [Member]
Noncash financing and investing activity:
Series C preferred share conversions	$ 10,639	$ 0