Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Revenues:
Revenues	$ 13,953	$ 18,880	$ 28,830	$ 35,144
Costs of revenues:
Costs of revenues	18,709	18,713	37,204	31,696
Gross (loss) profit	(4,756)	167	(8,374)	3,448
Operating expenses:
Administrative and selling expenses	9,670	7,168	18,602	12,434
Research and development expenses	2,964	1,141	4,787	2,296
Total costs and expenses	12,634	8,309	23,389	14,730
Loss from operations	(17,390)	(8,142)	(31,763)	(11,282)
Interest expense	(1,563)	(3,584)	(4,108)	(6,861)
Loss on extinguishment of debt			(11,156)
Loss on extinguishment of Series 1 preferred share obligation			(934)
Change in fair value of common stock warrant liability		(3,372)	(15,974)	(37,617)
Other income, net	32	340	(946)	871
Loss before benefit (provision) for income taxes	(18,921)	(14,758)	(64,881)	(54,889)
Benefit (provision) for income taxes	4	(11)	4	(31)
Net loss	(18,917)	(14,769)	(64,877)	(54,920)
Series B preferred stock dividends	(800)	(800)
Net loss attributable to common stockholders	$ (19,717)	$ (15,569)	$ (66,477)	$ (56,651)
Loss per share basic and diluted:
Net loss per share attributable to common stockholders	$ (0.06)	$ (0.07)	$ (0.21)	$ (0.27)
Basic and diluted weighted average shares outstanding	322,500,592	211,000,091	317,219,129	206,560,031
Series B Preferred Stock [Member]
Operating expenses:
Series B preferred stock dividends	$ (800)	$ (800)	$ (1,600)	$ (1,731)
Product [Member]
Costs of revenues:
Costs of revenues	1,921	2,838	4,287	4,854
Service and License [Member]
Revenues:
Revenues	660	6,972	5,573	12,584
Costs of revenues:
Costs of revenues	2,867	5,967	7,966	7,585
Generation [Member]
Revenues:
Revenues	6,185	4,631	11,076	10,073
Costs of revenues:
Costs of revenues	9,422	5,692	16,537	11,249
Advanced Technologies [Member]
Revenues:
Revenues	7,108	7,277	12,181	12,487
Costs of revenues:
Costs of revenues	$ 4,499	$ 4,216	$ 8,414	$ 8,008