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Supplemental Cash Flow Information - Schedule of Cash Flow, Supplemental Disclosures (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Debt Conversion [Line Items]      
Cash interest paid $ 8,376 $ 4,091 $ 4,486
Income taxes paid 2 48 2
Noncash financing and investing activity:      
Noncash reclassification between inventory and project assets 1,152   10,793
Acquisition of project assets   16,704  
Director stock compensation 104 102 282
Reclassification of value of executive share-based compensation 434    
Addition of operating lease liabilities 899    
Addition of operating lease right-of-use assets 899    
Cashless warrant exercises 25,994    
Reclassification to equity of warrant liability for warrant exercises 9,783    
Accrued purchase of fixed assets, cash paid to be paid in subsequent period 39 71 1,579
Accrued purchase of project assets, cash to be paid in subsequent period $ 502 222 3,115
Series C Preferred Stock [Member]      
Noncash financing and investing activity:      
Preferred stock share conversions   15,491 $ 20,220
Preferred share modification   (6,047)  
Series D Preferred Stock [Member]      
Noncash financing and investing activity:      
Preferred stock share conversions   $ 31,183