Consolidated Statements of Operations - USD ($)		12 Months Ended
		Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Revenues:
Revenues		$ 70,871,000	$ 60,752,000	$ 89,437,000
Costs of revenues:
Costs of revenues		78,596,000	82,021,000	86,344,000
Gross (loss) profit		(7,725,000)	(21,269,000)	3,093,000
Operating expenses:
Administrative and selling expenses		26,644,000	31,874,000	24,908,000
Research and development expenses		4,797,000	13,786,000	22,817,000
Total operating expenses		31,441,000	45,660,000	47,725,000
Loss from operations		(39,166,000)	(66,929,000)	(44,632,000)
Interest expense		(15,294,000)	(10,623,000)	(9,055,000)
Change in fair value of common stock warrant liability		(37,086,000)	0	0
Gain on extinguishment of financing obligation		1,801,000	0	0
Other income, net		684,000	93,000	3,338,000
Loss before (provision) benefit for income taxes		(89,061,000)	(77,459,000)	(50,349,000)
(Provision) benefit for income taxes		(46,000)	(109,000)	3,015,000
Net loss		(89,107,000)	(77,568,000)	(47,334,000)
Series B Preferred stock dividends				(3,200,000)
Net loss attributable to common stockholders		$ (92,438,000)	$ (100,245,000)	$ (62,168,000)
Net loss to common stockholders per share
Basic		$ (0.42)	$ (1.82)	$ (9.01)
Diluted	[1]	$ (0.42)	$ (1.82)	$ (9.01)
Weighted average shares outstanding
Basic		221,960,288	55,081,266	6,896,189
Diluted		221,960,288	55,081,266	6,896,189
Series A Warrant [Member]
Operating expenses:
Change in fair value of common stock warrant liability			$ (3,169,000)
Series B Preferred Stock [Member]
Operating expenses:
Series B Preferred stock dividends		$ (3,331,000)	(3,231,000)	$ (3,200,000)
Series C Preferred Stock [Member]
Operating expenses:
Series C Preferred stock deemed dividends and redemption value adjustment, net			(6,522,000)	(9,559,000)
Series D Preferred Stock [Member]
Operating expenses:
Series D Preferred stock deemed dividends and redemption accretion		0	(9,755,000)	(2,075,000)
Product Sales [Member]
Revenues:
Revenues			481,000	52,490,000
Costs of revenues:
Costs of revenues		9,924,000	18,552,000	54,504,000
Service Agreements and License Revenues [Member]
Revenues:
Revenues		25,133,000	26,618,000	15,757,000
Costs of revenues:
Costs of revenues		24,545,000	18,943,000	15,059,000
Generation Revenues [Member]
Revenues:
Revenues		19,943,000	14,034,000	7,171,000
Costs of revenues:
Costs of revenues		27,873,000	31,642,000	6,421,000
Advanced Technologies Contract Revenues [Member]
Revenues:
Revenues		25,795,000	19,619,000	14,019,000
Costs of revenues:
Costs of revenues		$ 16,254,000	$ 12,884,000	$ 10,360,000

[1] Due to the net loss to common stockholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive.