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Nature of Business and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 11 Months Ended | 12 Months Ended | 16 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) loanfacility shares | Jul. 12, 2023 shares | May 19, 2023 USD ($) | Aug. 04, 2021 USD ($) | Jun. 11, 2021 USD ($) | Aug. 31, 2021 USD ($) MW | Oct. 31, 2023 USD ($) loanfacility Plant MW shares | Apr. 30, 2022 USD ($) $ / shares shares | Oct. 31, 2023 USD ($) loanfacility Plant $ / shares MW shares | Oct. 31, 2022 USD ($) $ / shares shares | Oct. 31, 2021 USD ($) shares | Oct. 31, 2023 USD ($) loanfacility $ / shares shares | Jul. 07, 2022 USD ($)
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents, unrestricted | $ 249,952 |  |  |  |  |  | $ 249,952 |  | $ 249,952 | $ 458,055 |  | $ 249,952 |
Investments - short-term | $ 103,760 |  |  |  |  |  | $ 103,760 |  | 103,760 |  |  | $ 103,760 |
Proceeds from the issuance of debt |  |  |  |  |  |  |  |  | $ 100,500 |  | $ 10,175 |  |
Number of Term Loan Facilities | loanfacility | 2 |  |  |  |  |  | 2 |  | 2 |  |  | 2 |
Allowance for doubtful accounts or credit losses | $ 0 |  |  |  |  |  | $ 0 |  | $ 0 | 0 |  | $ 0 |
Impairment of goodwill |  |  |  |  |  |  |  |  | $ 0 | 0 | 0 |  |
Percentage of electricity output provided to customers |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
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 |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  |  |  |  |  |  |  |  | $ (400) | (900) | $ (900) |  |
Senior Back Leverage Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from debt |  |  |  |  |  |  | 20,000 |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Operating and finance lease, remaining lease term |  |  |  |  |  |  |  |  | 26 years |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Operating and finance lease, remaining lease term |  |  |  |  |  |  |  |  | 1 year |  |  |  |
US Treasury Securities |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Investments - short-term | 103,800 |  |  |  |  |  | 103,800 |  | $ 103,800 | $ 0 |  | 103,800 |
OpCo Financing Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of debt |  |  | $ 77,600 |  |  |  |  |  | 80,500 |  |  |  |
Net proceeds from issuance debt |  |  |  |  |  |  |  |  | 46,100 |  |  |  |
Unrestricted cash |  |  | 46,100 |  |  |  |  |  |  |  |  |  |
Funds Released from Restricted Cash |  |  | $ 11,200 |  |  |  |  |  |  |  |  |  |
East West Bank Partnership Flip Transaction |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity Of Plant | MW |  |  |  |  |  | 7.4 |  |  |  |  |  |  |
Closing costs |  |  |  | $ 800 |  |  |  |  |  |  |  |  |
Tax Equity Financing Commitment |  |  |  |  |  | $ 15,000 |  |  |  |  |  |  | $ 12,000
Remaining amount of draw |  |  |  | $ 12,000 |  |  |  |  |  |  |  |  |
Tax equity financing transactions with Franklin Park |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Closing costs |  |  |  |  |  |  | $ 1,800 |  | $ 1,800 |  |  |  |
Number of Fuel Cell Power Plants, Tax Equity Financing Transaction | Plant |  |  |  |  |  |  | 2 |  | 2 |  |  |  |
Tax Equity Financing Commitment | 30,200 |  |  |  |  |  | $ 30,200 |  | $ 30,200 |  |  | $ 30,200 |
Tax equity financing transaction, commitment amount received | $ 9,100 |  |  |  |  |  |  |  | $ 9,100 |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period shares new issues | shares |  |  |  |  |  |  |  |  | 44,320,825 | 38,396,904 | 69,074,573 |  |
Common Stock | 2022 Open Market Sale Agreement | Jefferies LLC, B. Riley Securities, Inc., Barclays Capital Inc., BMO Capital Markets Corp., BofA Securities, Inc., Canacord Genuity LLC, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Loop Capital Markets LLC |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Shares sold during the period | shares |  |  |  |  |  |  |  |  | 44,300,000 |  |  | 62,800,000 |
Average sale price per share | $ / shares |  |  |  |  |  |  |  |  | $ 2.25 |  |  | $ 2.66 |
Gross proceeds from issuance of common stock |  |  |  |  |  |  |  |  | $ 99,700 |  |  | $ 166,800 |
Shares remaining under the plan | shares | 32,200,000 |  |  |  |  |  | 32,200,000 |  | 32,200,000 |  |  | 32,200,000 |
Common Stock | 2022 Open Market Sale Agreement | Jefferies LLC, B. Riley Securities, Inc., Barclays Capital Inc., BMO Capital Markets Corp., BofA Securities, Inc., Canacord Genuity LLC, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Loop Capital Markets LLC | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period shares new issues | shares |  | 95,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Common Stock | 2021 Open Market Sale Agreement | Jefferies LLC and Barclays Capital Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate offering price |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Average sale price per share | $ / shares |  |  |  |  |  |  |  | $ 7.79 |  | $ 6.07 |  |  |
Stock issued during period shares new issues | shares |  |  |  |  |  |  |  | 64,000,000.0 |  | 19,900,000 |  |  |
Gross proceeds from issuance of common stock |  |  |  |  |  |  |  | $ 498,100 |  | $ 120,800 |  |  |
Derby Project |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from License Fees Received |  |  |  |  |  |  | $ 500 |  |  |  |  |  |
Derby Project | Tax equity financing transactions with Franklin Park |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Cash and Tax Allocations to be Received |  |  |  |  |  |  |  |  | 95.00% |  |  |  |
Remaining amount of draw | $ 20,600 |  |  |  |  |  | $ 20,600 |  | $ 20,600 |  |  | $ 20,600 |
Derby Project 14.0 Mega Watt | Tax equity financing transactions with Franklin Park |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity Of Plant | MW |  |  |  |  |  |  | 14.0 |  | 14.0 |  |  |  |
Derby Project 2.8 Mega Watt | Tax equity financing transactions with Franklin Park |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity Of Plant | MW |  |  |  |  |  |  | 2.8 |  | 2.8 |  |  |  |
Variable interest entity ("VIE") |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Business and Basis of Presentation |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents, unrestricted | $ 4,797 |  |  |  |  |  | $ 4,797 |  | $ 4,797 | $ 2,149 |  | $ 4,797 |

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