Investments held in physical commodities, such as gold, silver, platinum, crude oil, coal, sugar, rice, wheat.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Fair value of investment held in physical commodities, for example, but not limited to, gold, silver, platinum, crude oil, coal, sugar, rice, wheat.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Significant Accounting Policies (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Level 1 [Member]
Summary of investments at fair value
Investment in gold	$ 145,914,344	$ 142,168,257
Total	145,914,344	142,168,257
Level 2 [Member]
Summary of investments at fair value
Investment in gold
Total
Level 3 [Member]
Summary of investments at fair value
Investment in gold
Total