Commodities Held by Broker - Schedule of Commodities Held by Broker (Details) - USD ($)	Jul. 31, 2017	Oct. 31, 2016
Commodities Held By Broker
Option Contracts	$ 227,250	$ (83,753)
Future Contracts	551,306	218,475
Total Commodities	$ 778,556	$ 134,722

The fair value of the open option contracts written for the investment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B.4,Column E)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611197-123010

Name:	us-gaap_OpenOptionContractsWrittenAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant