Restricted Cash - Summary of Allocation of Restricted Cash (Details) - USD ($) $ in Thousands		Jul. 31, 2020	Oct. 31, 2019
Restricted Cash And Investments [Abstract]
Cash Restricted for Outstanding Letters of Credit	[1]	$ 6,879	$ 5,733
Cash restricted for PNC Sale-Leaseback transactions		15,026	17,934
Cash Restricted for Crestmark Sale-Leaseback Transaction		430
Bridgeport Fuel Cell Park Project Debt Service and Performance Reserves		6,957	4,946
Orion Facility - Performance Reserve	[2]	5,000
Orion Facility - Module and Debt Service Reserves	[3]	1,525
Orion Facility - Project Proceeds Account	[4]	4,243
Other		936	1,731
Total Restricted Cash		40,996	30,344
Restricted Cash and Cash Equivalents - Short-Term	[5]	(6,087)	(3,473)
Restricted Cash and Cash Equivalents - Long-Term		$ 34,909	$ 26,871

[1] Letters of credit outstanding as of July 31, 2020 expire on various dates through August 2028.

[2] Short-term reserve related to certain project construction and financing milestones. Refer to Note. 16. “Debt and Financing Obligations” for conditions to be met to achieve the release of this reserve.

[3] Long-term reserve primarily to fund future module replacements for operating projects which fall 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 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.