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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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