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Summary of Significant Accounting Policies (Policies) | 9 Months Ended
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Mar. 31, 2016
Accounting Policies [Abstract] |
Basis of Accounting, Policy [Policy Text Block] | (a) Basis of Accounting The accompanying financial statements of the Fund have been prepared in conformity with U.S. generally accepted accounting principles. The accompanying financial statements are unaudited, but in the opinion of management, all adjustments (which include normal recurring adjustments) considered necessary to present fairly the financial statements have been made. The Fund’s Prospectus dated January 26, 2016 should be read in conjunction with these interim financial statements. Interim period results are not necessarily indicative of results for a full-year period.
Use of Estimates, Policy [Policy Text Block] | b) Use of Estimates The preparation of the financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and accompanying notes. Actual results could differ from those estimates. There were no significant estimates used in the preparation of the financial statements.
Cash and Cash Equivalents, Policy [Policy Text Block] | (c) Cash Cash, when shown in the Statements of Financial Condition, represents non-segregated cash with the custodian and does not include short-term investments.
Cash Held by Broker [Policy Text Block] | (d) Cash Held by Broker Sit is registered as a “commodity trading advisor” and acts as such for the Fund. Sit is a subsidiary of Sit Investment Associates, Inc. The Fund’s arrangement with SG Americas Securities, LLC, the Fund’s FCM, requires the Fund to meet its variation margin requirement related to the price movements, both positive and negative, on futures contracts held by the Fund by keeping cash on deposit with the FCM. These amounts are shown as Segregated cash held by broker in the Statements of Financial Condition. The Fund deposits cash and United States Treasury Obligations with the FCM subject to Commodity Futures Trading Commission (the “CFTC”) regulations and various exchange and broker requirements. The combination of the Fund’s deposits with its FCM of cash and United States Treasury Obligations and the unrealized gain or loss on open futures contracts (variation margin) represents the Fund’s overall equity in its brokerage trading account. The Fund uses its cash held by the FCM to satisfy variation margin requirements. The Fund earns interest on its cash deposited with the FCM and is recorded on the accrual basis.
Fiscal Period, Policy [Policy Text Block] | (e) Final Net Asset Value for Fiscal Period The calculation time of the Fund’s final net asset value for creation and redemption of Fund shares for the three months ended March 31, 2016 was at 4:00 p.m. Eastern Time. Although the Fund’s shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, the 4:00 p.m. Eastern Time represented the final opportunity to transact in creation or redemption baskets for the three months ended March 31, 2016. Fair value per share is determined at the close of the NYSE Arca. For financial reporting purposes, the Fund values its investment positions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements differ from those used in the calculation of the Fund’s final creation/redemption NAV at March 31, 2016.
Investment, Policy [Policy Text Block] | (f) Investment Valuation Short-term investments, excluding U.S. Treasury Bills, are carried at amortized cost, which approximates fair value. U.S. Treasury Bills are valued as determined by an independent pricing service based on methods which include consideration of: yields or prices of securities of comparable quality, coupon, maturity and type; indications as to values from dealers; and general market conditions. Futures contracts are valued at the last settled price on the applicable exchange on which that futures contract trades.
Fair Value of Financial Instruments, Policy [Policy Text Block] | (g) Financial Instruments and Fair Value The Fund discloses the fair value of its investments in accordance with the Financial Accounting Standards Board (FASB) fair value measurement and disclosure guidance which requires a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent to the Fund (observable inputs); and (2) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements hierarchy are as follows: Level I: Quoted prices (unadjusted) in active markets for identical assets and liabilities that the reporting entity has the ability to access at the measurement date. Level II: Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II inputs include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs). Level III: Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. In some instances, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest input level that is significant to the fair value measurement in its entirety. Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. The following tables summarize the valuation of investments at March 31, 2016 and at June 30, 2015 using the fair value hierarchy:
|  | March 31, 2016 (unaudited) |
|  | Short-Term |  |  |  |  |  |  |
|  | Investments |  | Written |  |  |  |  |
|  | and Purchased |  | Options |  | Future |  |  |
|  | Options |  | Contracts |  | Contracts |  | Total |
Level I – Quoted Prices |  | $ | 18,938,447 | a | $ | (190,117) | b | $ | 48,032 | c | $ | 18,796,362 |
a – Included in Investments in short-term securities in the Statements of Financial Condition. b – Included in Options Written, at fair value in the Statements of Financial Condition. c – Included in Receivable on open futures contracts in the Statements of Financial Condition.
|  | June 30, 2015 (audited) |
|  | Short-Term |  |  |  |  |  |  |
|  | Investments |  | Written |  |  |  |  |
|  | and Purchased |  | Options |  | Future |  |  |
|  | Options |  | Contracts |  | Contracts |  | Total |
Level I – Quoted Prices |  | $ | 5,678,452 | a | $ | (27,070) | b | $ | 6,608 | c | $ | 5,657,990 |
a – Included in Investments in short-term securities in the Statements of Financial Condition. b – Included in Options Written, at fair value in the Statements of Financial Condition. c – Included in Receivable and Payable on open futures contracts in the Statements of Financial Condition. There were no Level II or Level III type holdings at March 31, 2016 or June 30, 2015 and during the three and nine months ended March 31, 2016, respectively. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities.
Investment Transactions and Related Income [Policy Text Block] | (h) Investment Transactions and Related Income Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis, and marked to market daily. Unrealized gain/loss on open futures contracts is reflected in Receivable/Payable on open futures contracts in the Statements of Financial Condition and the change in the unrealized gain/loss between periods is reflected in the Statements of Operations. Discounts on short-term securities purchased are accreted daily and reflected as Interest Income in the Statements of Operations.
Income Tax, Policy [Policy Text Block] | (i) Federal Income Taxes The Fund is registered as a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, the Fund does not expect to incur U.S. federal income tax liability; rather, each beneficial owner is required to take into account their allocable share of the Fund’s income, gain, loss, deductions and other items for the Fund’s taxable year ending with or within the beneficial owner’s taxable year. Management of the Fund has reviewed the open tax year and major jurisdictions and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Fund is also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management will monitor its tax positions taken to determine if adjustments to its conclusions are necessary based on factors including, but not limited to, further implementation of guidance expected from the Financial Accounting Standards Board and on-going analysis of tax law, regulation, and interpretations thereof.

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- Definition Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -SubTopic 10 -Section 05 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6375392&loc=d3e26790-107797 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51655414&loc=d3e18780-107790 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 203 -Paragraph 02-03 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 + Details
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- Definition Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51664549&loc=d3e5291-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.3A-03.(b)) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355100-122828 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.3A-02.(b)) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355033-122828 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph k -Article 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 06 -Article 3 + Details
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