Supplemental Cash Flow Information - Schedule of Cash Flow, Supplemental Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Debt Conversion [Line Items]
Cash interest paid	$ 5,765	$ 8,376	$ 4,091
Income taxes paid	6	2	48
Noncash financing and investing activity:
Noncash reclassification between inventory and project assets	7,052	1,152
Acquisition of project assets			16,704
Director stock compensation	275	104	102
Reclassification of value of executive share-based compensation		434
Addition of operating lease liabilities	1,459	899
Addition of operating lease right-of-use assets	1,459	899
Cashless warrant exercises		25,994
Reclassification to equity of warrant liability for warrant exercises	21,170	9,783
Accrued purchase of fixed assets, cash to be paid in subsequent period	1,537	39	71
Accrued purchase of project assets, cash to be paid in subsequent period	$ 6,707	$ 502	222
Series C Preferred Stock
Noncash financing and investing activity:
Preferred stock share conversions			15,491
Preferred share modification			(6,047)
Series D Preferred Stock
Noncash financing and investing activity:
Preferred stock share conversions			$ 31,183