Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Cash flows from operating activities:
Net loss	$ (40,151)	$ (17,548)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	488	982
Loss from change in fair value of embedded derivatives	0	22
Depreciation and amortization	4,630	2,199
Change in fair value of common stock warrant liability	34,245	0
Gain on Series 1 preferred stock extinguishment	(475)	0
Non-cash interest expense on preferred stock and debt obligations	1,591	1,574
Operating lease expense	156	0
Operating lease payments	(211)	0
Unrealized foreign exchange gains	(84)	(12)
Other non-cash transactions, net	308	187
(Increase) decrease in operating assets:
Accounts receivable	(2,301)	1,329
Unbilled receivables	554	(7,828)
Inventories	(5,780)	(1,227)
Other assets	(1,141)	139
Increase (decrease) in operating liabilities:
Accounts payable	(2,481)	(152)
Accrued liabilities	(816)	2,532
Deferred revenue	4,962	5,845
Net cash used in operating activities	(6,506)	(11,958)
Cash flows from investing activities:
Capital expenditures	(64)	(1,591)
Project asset expenditures	(7,624)	(12,633)
Project asset acquisition	(611)	0
Net cash used in investing activities	(8,299)	(14,224)
Cash flows from financing activities:
Repayment of debt	(15,535)	(1,610)
Proceeds from debt, net of debt discount	66,862	17,250
Payment of deferred financing costs	(2,455)	(485)
Payment of preferred dividends and return of capital	(3,385)	(1,036)
Common stock issued for stock plans and related expenses	0	31
Proceeds from sale of common stock and warrant exercises, net	3,502	0
Net cash provided by financing activities	48,989	14,150
Effects on cash from changes in foreign currency rates	(49)	7
Net increase (decrease) in cash, cash equivalents and restricted cash	34,135	(12,025)
Cash, cash equivalents and restricted cash-beginning of period	39,778	80,239
Cash, cash equivalents and restricted cash-end of period	73,913	68,214
Supplemental cash flow disclosures:
Cash interest paid	558	827
Noncash financing and investing activity:
Operating lease liabilities	489	0
Operating lease right-of-use assets	489	0
Net noncash reclasses from project assets to inventory	2,756	0
Warrant exercises	25,994	0
Accrued purchase of fixed assets, cash to be paid in subsequent period	9	107
Accrued purchase of project assets, cash to be paid in subsequent period	495	2,050
Series C Preferred Stock [Member]
Noncash financing and investing activity:
Preferred share conversions	0	1,974
Series D Preferred Stock [Member]
Noncash financing and investing activity:
Preferred share conversions	$ 0	$ 4,334