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Investments (Details) - USD ($) | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | ---
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |  |
Written options, at fair value |  | $ (5,906) | $ (19,336)
Payable on open futures contracts |  | 105,125 | 326,457
SIT RISING RATE ETF [Member] |  |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |  |
Written options, at fair value |  | (5,906) | (19,336)
Payable on open futures contracts |  |  | 326,457
SIT RISING RATE ETF [Member] | Interest Rate Risk [Member] |  |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |  |
Purchased options | [1] | 21,797 | 35,625
Receivable on open futures contracts | [2] | 15,878 |
Written options, at fair value | [1] | (5,906) | (19,336)
Payable on open futures contracts | [3] |  | (326,457)
BREAKWAVE DRY BULK SHIPPING ETF |  |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |  |
Written options, at fair value |  |  |
Payable on open futures contracts |  | 105,125 |
BREAKWAVE DRY BULK SHIPPING ETF | Interest Rate Risk [Member] |  |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |  |
Receivable on open futures contracts | [2] |  | $ 391,415
Payable on open futures contracts | [3] | $ (105,125) |
[1] | Represents fair value of options contracts as reported in the Combined Statements of Assets and Liabilities.
[2] | Represents cumulative appreciation of futures contracts as reported in the Combined Statements of Assets and Liabilities.
[3] | Represents cumulative depreciation of futures contracts as reported in the Combined Statements of Assets and Liabilities.

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- Definition Represents the amount payable on open future contracts as on the balance sheet date. + References No definition available. + Details
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- Definition The fair value of the open option contracts written for the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B.4,Column E) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611197-123010 + Details
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