Project Assets - Additional Information (Details) $ in Thousands		9 Months Ended	12 Months Ended
Apr. 05, 2018 USD ($)	Jul. 31, 2018 USD ($) ProjectAsset	Oct. 31, 2017 USD ($) ProjectAsset
Project Assets [Abstract]
Long-term project assets construction in progress		$ 59,700	$ 40,900
Long-term project assets		$ 89,694	$ 73,001
Number of project assets \| ProjectAsset		5	5
Sale leaseback transaction, net book value		$ 30,000	$ 32,100
Project revenue	$ 10,800
Reduction in project assets relating to sale	$ 9,800
Impairment on project asset		$ 500

The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
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-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51840-112757

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
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-Section 55
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
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-Section 55
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51831-112757

Name:	us-gaap_SaleLeasebackTransactionNetBookValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant