Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenues:
Revenues	$ 18,880	$ 9,216	$ 35,144	$ 26,999
Costs of revenues:
Costs of revenues	18,713	12,856	31,696	32,844
Gross profit (loss)	167	(3,640)	3,448	(5,845)
Operating expenses:
Administrative and selling expenses	7,168	9,805	12,434	16,564
Research and development expenses	1,141	4,178	2,296	10,458
Total costs and expenses	8,309	13,983	14,730	27,022
Loss from operations	(8,142)	(17,623)	(11,282)	(32,867)
Interest expense	(3,584)	(1,807)	(6,861)	(4,271)
Change in fair value of common stock warrant liability	(3,372)		(37,617)	0
Other income (expense), net	340	(31)	871	129
Loss before benefit (provision) for income taxes	(14,758)	(19,461)	(54,889)	(37,009)
(Provision) benefit for income taxes	(11)	(69)	(31)	(69)
Net loss	(14,769)	(19,530)	(54,920)	(37,078)
Series B preferred stock dividends	(800)	(800)
Net loss attributable to common stockholders	$ (15,569)	$ (22,876)	$ (56,651)	$ (55,914)
Loss per share basic and diluted:
Net loss per share attributable to common stockholders	$ (0.07)	$ (2.06)	$ (0.27)	$ (5.77)
Basic and diluted weighted average shares outstanding	211,000,091	11,090,698	206,560,031	9,683,253
Series A Warrant [Member]
Operating expenses:
Change in fair value of common stock warrant liability		$ (3,169)		$ (3,169)
Series B Preferred Stock [Member]
Operating expenses:
Series B preferred stock dividends	$ (800)	(800)	$ (1,731)	(1,600)
Series C Preferred Stock [Member]
Operating expenses:
Series C preferred stock deemed dividends (contribution) and redemption value adjustment, net		1,599		(7,406)
Series D Preferred Stock [Member]
Operating expenses:
Series D preferred stock deemed dividends and redemption accretion	0	(976)	0	(6,661)
Product [Member]
Costs of revenues:
Costs of revenues	2,838	6,393	4,854	9,815
Service and License [Member]
Revenues:
Revenues	6,972	2,598	12,584	14,370
Costs of revenues:
Costs of revenues	5,967	1,745	7,585	14,064
Generation [Member]
Revenues:
Revenues	4,631	1,633	10,073	3,112
Costs of revenues:
Costs of revenues	5,692	1,685	11,249	3,321
Advanced Technologies [Member]
Revenues:
Revenues	7,277	4,985	12,487	9,517
Costs of revenues:
Costs of revenues	$ 4,216	$ 3,033	$ 8,008	$ 5,644