Restricted Cash - Summary of Allocation of Restricted Cash (Details) - USD ($) $ in Thousands		Jan. 31, 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		13,031	15,125
Cash Restricted for Crestmark Sale-Leaseback Transaction		431	431
Bridgeport Fuel Cell Park Project Debt Service and Performance Reserves		10,457	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		627	1,344
Total Restricted Cash		31,024	42,185
Restricted Cash and Cash Equivalents - Short-Term	[5]	(12,252)	(9,233)
Restricted cash and cash equivalents - long-term		$ 18,772	$ 32,952

[1] Letters of credit outstanding as of January 31, 2021 expire on various dates through August 2028.

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

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

[4] Reserve related to proceeds received from project refinancing 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.