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Investments (Details 1) - Interest Rate Risk [Member] - USD ($)
 3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
SIT RISING RATE ETF [Member]        
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items]        
Location of Gain (Loss) on Derivatives Net realized loss on investments, futures and options contracts and/or Change in unrealized gain (loss) on investments, futures and options contracts Net realized gain (loss) on investments, futures and options contracts and/or Change in unrealized gain (loss) on investments, futures and options contracts Net realized loss on investments, futures and options contracts and/or Change in unrealized gain (loss) on investments, futures and options contracts Net realized gain (loss) on investments, futures and options contracts and/or Change in unrealized gain (loss) on investments, futures and options contracts
Realized Loss on Derivatives Recognized in Income $ (167,895) $ (2,457,815) $ (420,623) $ (2,914,522)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income $ (444,797) $ 1,778,789 $ (76,566) $ 167,281
BREAKWAVE DRY BULK SHIPPING ETF        
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items]        
Location of Gain (Loss) on Derivatives Net realized loss on investments and futures and/or Change in unrealized gain (loss) on investments and futures contracts Net realized loss on investments and futures and/or Change in unrealized gain (loss) on investments and futures contracts Net realized loss on investments and futures and/or Change in unrealized gain (loss) on investments and futures contracts Net realized loss on investments and futures and/or Change in unrealized gain (loss) on investments and futures contracts
Realized Loss on Derivatives Recognized in Income $ (2,727,061) $ (956,887) $ (2,388,880) $ (1,391,126)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income $ (1,871,170) $ (511,380) $ (1,204,565) $ (544,960)