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v3.23.1

Nature of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 10 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 19, 2023 | Jul. 12, 2022 | Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2023 | Apr. 30, 2023 | Oct. 31, 2022
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents, unrestricted |  |  | $ 246,844 |  | $ 246,844 | $ 246,844 | $ 458,055
Investments - short-term |  |  | $ 76,400 |  | $ 76,400 | $ 76,400 |
Shares remaining under the plan |  |  | 75,600,000 |  | 75,600,000 | 75,600,000 |
US Treasury Securities |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
US Treasury Notes purchased |  |  |  |  | $ 138,200 |  |
US Treasury Securities sold |  |  |  |  | 63,300 |  |
Investments - short-term |  |  | $ 76,400 |  | $ 76,400 | $ 76,400 | $ 0
Non-Recourse Project Financing Facility | Subsequent Event |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Repayments of debt | $ 1,800 |  |  |  |  |  |
Unrestricted cash | 46,100 |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Stock issued during period shares new issues |  |  | 949,438 | 19,896,904 |  |  |
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 [Line Items] |  |  |  |  |  |  |
Average sale price per share |  |  | $ 3.02 |  | $ 3.02 | $ 3.60 |
Gross proceeds from issuance of common stock |  |  | $ 2,900 |  | $ 2,900 | $ 70,000 |
Stock issued during period shares new issues |  |  | 900,000 |  | 900,000 | 19,400,000 |
Shares remaining under the plan |  |  | 75,600,000 |  | 75,600,000 | 75,600,000 |
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 [Line Items] |  |  |  |  |  |  |
Aggregate number of shares to be offered |  | 95,000,000.0 |  |  |  |  |
Stock issued during period shares new issues |  | 95,000,000.0 |  |  |  |  |
Liberty Bank, Fifth Third Bank and Connecticut Green Bank | Subsequent Event |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Repayments of debt | 11,400 |  |  |  |  |  |
Liberty Bank and Fifth Third Bank | Subsequent Event |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Unrestricted cash | 46,100 |  |  |  |  |  |
Funds Released from Restricted Cash | 11,200 |  |  |  |  |  |
Liberty Bank and Fifth Third Bank | Non-Recourse Project Financing Facility | Subsequent Event |  |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Funds Released from Restricted Cash | $ 11,200 |  |  |  |  |  |

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