Restricted Cash - Summary of Allocation of Restricted Cash (Details) - USD ($) $ in Thousands		Apr. 30, 2021	Oct. 31, 2020
Restricted Cash And Investments [Abstract]
Cash Restricted for Outstanding Letters of Credit	[1]	$ 6,478	$ 6,543
Cash Restricted for PNC Sale-Leaseback Transactions		14,989	15,125
Cash Restricted for Crestmark Sale-Leaseback Transaction		432	431
Bridgeport Fuel Cell Park Project Debt Service and Performance Reserves		9,668	7,549
Orion Facility - Performance Reserve	[2]		5,000
Orion Facility - Module and Debt Service Reserves	[3]		1,950
Orion Facility - Project Proceeds Account	[4]		4,243
Other		529	1,344
Total Restricted Cash		32,096	42,185
Restricted Cash and Cash Equivalents - Short-Term	[5]	(17,427)	(9,233)
Restricted cash and cash equivalents - long-term		$ 14,669	$ 32,952

[1] Letters of credit outstanding as of April 30, 2021 expire on various dates through August 2028.

[2] Short-term reserve that was related to certain project construction and financing milestones.

[3] Long-term reserve that was to be used primarily to fund future module exchanges for operating projects falling under the collateral pool (CCSU and Triangle Street) under the Orion Facility.

[4] Reserve that was related to proceeds received from project refinancing that was to be used to pay-down the Orion Facility unless redeployed into other project financing (at the option of the Orion Agent and the lenders under the Orion Facility).

[5] Short-term restricted cash and cash equivalents are amounts expected to be released and categorized as unrestricted cash within twelve months of the balance sheet date.