Nature of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Details) $ in Thousands, $ in Millions					1 Months Ended				5 Months Ended		7 Months Ended	12 Months Ended
	Jun. 11, 2021 USD ($)	Dec. 07, 2020 USD ($)	Jun. 14, 2019 USD ($)	May 08, 2019 shares	Aug. 31, 2022	Aug. 31, 2021 USD ($) MW	Feb. 28, 2021 USD ($)	Dec. 31, 2020 USD ($) shares	Oct. 31, 2021 USD ($) shares	Oct. 31, 2020 USD ($) shares	Jun. 10, 2021 shares	Oct. 31, 2021 USD ($) shares	Oct. 31, 2020 USD ($) shares	Oct. 31, 2019 USD ($) shares	Apr. 08, 2021 shares	Apr. 07, 2021 shares	Dec. 17, 2020 USD ($)	Dec. 17, 2020 CAD ($)	May 11, 2020 shares	May 10, 2020 shares	Nov. 01, 2019 USD ($)	May 07, 2019 shares	Oct. 31, 2018 shares
Nature Of Business And Basis Of Presentation [Line Items]
Cash and cash equivalents, unrestricted									$ 432,213	$ 149,867		$ 432,213	$ 149,867
Underwritten offering shares | shares								25,000,000.0
Net proceeds from underwriting shares after deducting underwriting discounts and commissions								$ 156,400
Unrestricted cash										$ 47,500			$ 47,500
Redeemable noncontrolling interests									$ 3,030			$ 3,030
Stockholders' Equity Reverse Stock Split				1-for-12 reverse stock split
Reverse stock split, conversion ratio				0.084
Common stock, shares outstanding | shares				15,284,269					366,618,693	294,706,758		366,618,693	294,706,758									183,411,230
Common stock, shares authorized | shares				225,000,000					500,000,000	337,500,000		500,000,000	337,500,000		500,000,000.0	337,500,000			337,500,000	225,000,000.0
Preferred stock, shares authorized | shares				250,000
Payment of milestone based amount			$ 10,000
Project represented value of contract														$ 10,000
Extended Product Warranty Description												We warranty our products for a specific period of time against manufacturing or performance defects. Our U.S. warranty is generally limited to a term of 15 months after shipment or 12 months after acceptance of our products.
Extended product warranty period after shipment												15 months
Extended product warranty period after acceptance of products												12 months
Impairment of goodwill												$ 0	$ 0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax												(900)	200	$ (100)
Operating lease liability									$ 9,125			9,125									$ 10,100
Operating lease right-of-use assets, net									8,109	$ 10,098		8,109	10,098								$ 10,300
Variable interest entity ("VIE")
Nature Of Business And Basis Of Presentation [Line Items]
Cash and cash equivalents, unrestricted									1,364	$ 0		$ 1,364	$ 0
Sales Revenue Net Member | Customer Concentration Risk Member | Top Customers [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage												79.00%	80.00%	77.00%
Unspecific Upgrade [member]
Nature Of Business And Basis Of Presentation [Line Items]
Revenues													$ 800
Joint Development Agreementsii [member]
Nature Of Business And Basis Of Presentation [Line Items]
Proceeds from License Fees Received													$ 4,000
East West Bank Partnership Flip Transaction
Nature Of Business And Basis Of Presentation [Line Items]
Capacity of plant | MW						7.4
Period after which entity has an option to acquire all of the equity interests					5 years 6 months
Percentage of contributed amount payable by the company					101.00%
Percentage of tax equity commitment payable					5.00%
Tax Equity Financing Commitment						$ 15,000
East West Bank Partnership Flip Transaction | Variable interest entity ("VIE")
Nature Of Business And Basis Of Presentation [Line Items]
Net assets									$ 3,000			$ 3,000
Common Stock [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Stock issued during period shares new issues | shares												69,074,573	86,307,932	119,128,677
Common stock, shares outstanding | shares									366,618,693	294,706,758		366,618,693	294,706,758	193,608,684									7,972,686
Common Stock [Member] | At Market Issuance Sales Agreement [Member] | Jefferies LLC [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Aggregate offering price	$ 500,000
Stock issued during period shares new issues | shares									44,100,000	28,300,000	0
Gross proceeds from issuance of common stock									$ 377,200	$ 70,100
Net proceeds from issuance of common stock									369,700
Common stock, shares reserved for issuance | shares											0
Sale agreement, common stock, value, available for issuance									$ 122,800			$ 122,800
Enbridge Inc. [Member] | Series 1 Preferred Shares [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Related Party Transaction, Due from (to) Related Party																	$ 21,500	$ 27.4
Sr. Secured Debt [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Settlement of outstanding principal payment and interest		$ 87,300
Unrestricted cash		$ 11,200
Liberty Bank Promissory Note (PPP Note) [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Repayments of debt							$ 6,500