Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenues:
Revenues	$ 18,728	$ 22,712	$ 53,872	$ 49,711
Costs of revenues:
Costs of revenues	21,856	14,747	53,552	47,591
Gross (loss) profit	(3,128)	7,965	320	2,120
Operating expenses:
Administrative and selling expenses	6,607	7,058	19,041	23,622
Research and development expenses	1,027	1,977	3,323	12,435
Total costs and expenses	7,634	9,035	22,364	36,057
Loss from operations	(10,762)	(1,070)	(22,044)	(33,937)
Interest expense	(4,165)	(3,536)	(11,026)	(7,807)
Change in fair value of common stock warrant liability	(1,694)		(39,311)	0
Gain on extinguishment of financing obligation	1,801		1,801	0
Other expense, net	(501)	(685)	370	(556)
Loss before benefit (provision) for income taxes	(15,321)	(5,291)	(70,210)	(42,300)
(Provision) benefit for income taxes	(10)	(20)	(41)	(89)
Net loss	(15,331)	(5,311)	(70,251)	(42,389)
Series B preferred stock dividends	(800)
Net loss attributable to common stockholders	$ (16,131)	$ (8,328)	$ (72,782)	$ (64,242)
Loss per share basic and diluted:
Net loss per share attributable to common stockholders	$ (0.07)	$ (0.18)	$ (0.35)	$ (2.97)
Basic and diluted weighted average shares outstanding	217,966,402	45,069,911	210,389,907	21,608,427
Series A Warrant [Member]
Operating expenses:
Change in fair value of common stock warrant liability				$ (3,169)
Series B Preferred Stock [Member]
Operating expenses:
Series B preferred stock dividends	$ (800)	$ (810)	$ (2,531)	(2,410)
Series C Preferred Stock [Member]
Operating expenses:
Series C preferred stock deemed dividends (contribution) and redemption value adjustment, net		884		(6,522)
Series D Preferred Stock [Member]
Operating expenses:
Series D preferred stock deemed dividends and redemption accretion	0	(3,091)	0	(9,752)
Product [Member]
Costs of revenues:
Costs of revenues	2,658	4,547	7,512	14,362
Service and License [Member]
Revenues:
Revenues	7,113	11,496	19,697	25,866
Costs of revenues:
Costs of revenues	8,833	1,102	16,418	15,166
Generation [Member]
Revenues:
Revenues	4,722	5,448	14,795	8,560
Costs of revenues:
Costs of revenues	6,327	5,726	17,576	9,047
Advanced Technologies [Member]
Revenues:
Revenues	6,893	5,768	19,380	15,285
Costs of revenues:
Costs of revenues	$ 4,038	$ 3,372	$ 12,046	$ 9,016