Nature of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended				9 Months Ended	13 Months Ended
	Aug. 01, 2023	Jul. 12, 2022	Aug. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Jul. 31, 2022	Apr. 30, 2022	Jul. 31, 2023	Jul. 31, 2023	Sep. 11, 2023	Oct. 31, 2022
Nature of Business and Basis of Presentation
Cash and cash equivalents, unrestricted				$ 303,679				$ 303,679	$ 303,679		$ 458,055
Investments - short-term				77,431				77,431	77,431
Proceeds from the issuance of debt								80,500
US Treasury Securities
Nature of Business and Basis of Presentation
Investments - short-term				77,400				77,400	$ 77,400		$ 0
OpCo Financing Facility
Nature of Business and Basis of Presentation
Proceeds from the issuance of debt				80,500
Net proceeds from issuance debt				$ 46,100
Common Stock
Nature of Business and Basis of Presentation
Stock issued during period shares new issues				37,931,204	949,438	7,814,115	19,896,904
Common Stock | 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
Average sale price per share									$ 2.67
Gross proceeds from issuance of common stock								$ 88,000
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
Nature of Business and Basis of Presentation
Aggregate shares for offer				34,200,000				34,200,000	34,200,000
Shares sold during the period				41,300,000				42,300,000	60,800,000
Average sale price per share				$ 2.24				$ 2.26	$ 2.67
Stock issued during period shares new issues				37,900,000				38,900,000	57,400,000
Gross proceeds from issuance of common stock				$ 85,100				$ 88,000	$ 155,000
Shares remaining under the plan				37,600,000				37,600,000	37,600,000
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 | Subsequent Event
Nature of Business and Basis of Presentation
Shares sold during the period	2,000,000.0
Average sale price per share	$ 2.14
Gross proceeds from issuance of common stock	$ 4,300
Shares remaining under the plan										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		95,000,000.0
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 | Settled After Period End [Member}
Nature of Business and Basis of Presentation
Shares sold during the period								3,400,000
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 | Settled After Period End [Member} | Subsequent Event
Nature of Business and Basis of Presentation
Stock issued during period shares new issues	3,400,000
Gross proceeds from issuance of common stock			$ 7,400