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Organization (Details Narrative) - USD ($)			3 Months Ended
	Jan. 08, 2015	Sep. 26, 2014	Sep. 30, 2017	Jan. 27, 2016
Common unit, issued			50,000
Minimum [Member]
Percentage of funds asset			5.00%
Percentage of treasury instrument			3.00%
Minimum [Member] | Two Year Maturity Treasury Instruments [Member]
Expected range for duration weighted percentage			30.00%
Minimum [Member] | Ten Year Maturity Treasury Instruments [Member]
Expected range for duration weighted percentage			5.00%
Maximum [Member]
Percentage of funds asset			15.00%
Percentage of treasury instrument			10.00%
Maximum [Member] | Five Year Maturity Treasury Instruments [Member]
Expected range for duration weighted percentage			70.00%
Maximum [Member] | Ten Year Maturity Treasury Instruments [Member]
Expected range for duration weighted percentage			25.00%
ETF Managers Capital LLC [Member]
Proceeds from contributed capital		$ 1,000
Number of shares exchanged		40
Share price (in dollars per share)		$ 25.00
Sit Fixed Income Advisors II, LLC [Member]
Proceeds from contributed capital	$ 5,000,000
Share price (in dollars per share)	$ 25.00
Percentage of fee paid				0.50%

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It represents the expected range for duration weighted percentage during the year.

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- Definition

Number of common units issued of limited liability company (LLC).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

The cash inflow associated with the amount received by a corporation from a shareholder during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

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Price of a single share of a number of saleable stocks of a company.

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