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Net Asset Value and Financial Highlights (Tables) | 9 Months Ended
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Mar. 31, 2016
Net Asset Value And Financial Highlights [Abstract] |
Schedule Of Net Asset Value And Ratios To Average Net Assets [Table Text Block] |
|  |  |  |  |  | For the Period |
|  | For the Three |  | For the Nine |  | from |
|  | Months Ended |  | Months Ended |  | February 19, 2015 |
|  | March 31, |  | March 31, |  | to March 31, |
|  | 2016 |  | 2016 |  | 2015 |
Net Asset Value |  |  |  |  |  |  |  |  |  |
Net asset value per Share, beginning of period |  | $ | 24.21 |  | $ | 24.24 |  | $ | 25.00 |
Net investment income (loss) |  |  | (0.08) |  |  | (0.28) |  |  | (0.05) |
Net realized and unrealized gain (loss) |  |  | (1.19) |  |  | (1.02) |  |  | (0.68) |
Net Income (Loss) |  |  | (1.27) |  |  | (1.30) |  |  | (0.73) |
Net Asset Value per Share, end of period |  | $ | 22.94 |  | $ | 22.94 |  | $ | 24.27 |
Market Value per Share, end of period |  | $ | 23.03 |  | $ | 23.03 |  | $ | 24.32 | (a)
Ratios to Average Net Assets* |  |  |  |  |  |  |  |  |  |
Expense Ratio*** |  |  | 1.68 | % |  | 1.71 | % |  | 1.71 | %
Expense Ratio*** before Waiver/Assumption |  |  | 3.15 | % |  | 4.41 | % |  | 10.56 | %
Net Investment Income (Loss) |  |  | (1.46) | % |  | (1.57) | % |  | (1.71) | %
Total Return, at Net Asset Value** |  |  | (5.25) | % |  | (5.36) | % |  | (2.92) | %
Total Return, at Market Value** |  |  | (4.95) | % |  | (5.73) | % |  | (2.72) | %
* Percentages are annualized. ** Percentages are not annualized. *** As of February 19, 2015 Fund expenses have been capped at 1.50% of average daily net assets, plus brokerage commissions and interest expense, as disclosed in Note 4.
(a) | Represents the closing bid/ask mean as of March 31, 2015.

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- Definition Tabular disclosure of net asset value and ratios to average net assets. + References No definition available. + Details
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