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Organization (Details Textual) - USD ($)		1 Months Ended	9 Months Ended
	Jan. 08, 2015	Sep. 26, 2014	Mar. 31, 2016
Common Unit, Issued			50,000
Maximum [Member]
Percentage Of Funds Asset			15.00%
Percentage Of Treasury Instrument			10.00%
Minimum [Member]
Percentage Of Funds Asset			5.00%
Percentage Of Treasury Instrument			3.00%
Two Year Maturity Treasury Instruments [Member] | Minimum [Member]
Expected Range for duration weighted percentage			30.00%
Five Year Maturity Treasury Instruments [Member] | Maximum [Member]
Expected Range for duration weighted percentage			70.00%
Ten Year Maturity Treasury Instruments [Member] | Maximum [Member]
Expected Range for duration weighted percentage			25.00%
Ten Year Maturity Treasury Instruments [Member] | Minimum [Member]
Expected Range for duration weighted percentage			5.00%
ETF Managers Capital LLC [Member]
Proceeds from Contributed Capital		$ 1,000
Number Of shares Exchanged		40
Share Price		$ 25.00
Sit Fixed Income Advisors II, LLC [Member]
Proceeds from Contributed Capital	$ 5,000,000
Share Price	$ 25.00
Sit Fixed Income Advisors II, LLC [Member] | Maximum [Member]
Percentage of fee paid			0.50%
Sit Fixed Income Advisors II, LLC [Member] | Minimum [Member]
Percentage of fee paid			0.35%

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Percentage of funds asset used as payment for or collateral for Treasury Instruments.

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- Definition

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

+ References

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: 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=56944662&loc=d3e3255-108585

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- Definition

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

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