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Creations and Redemptions (Details Textual)	Mar. 31, 2016 USD ($) shares
Number Of Shares In One Or More Baskets | shares	50,000
Authorized Participant Transaction Fee Per Order | $	$ 500

X

- Definition

The amount of transaction fee per order paid by authorized participant.

+ References

No definition available.

+ Details

Name:	cik000161094_AuthorizedParticipantTransactionFeePerOrder
Namespace Prefix:	cik000161094_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

It denotes the number of shares in one or more baskets.

+ References

No definition available.

+ Details

Name:	cik000161094_NumberOfSharesInOneOrMoreBaskets
Namespace Prefix:	cik000161094_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant