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Summary of Significant Accounting Policies (Details) - USD ($)
Mar. 31, 2020
Jun. 30, 2019
Short-Term Investments $ 7,430,127 $ 13,005,522
Written Options Contracts (18,867) (19,336)
SIT RISING RATE ETF [Member]    
Short-Term Investments 4,873,652 11,909,897
Written Options Contracts (18,867) (19,336)
SIT RISING RATE ETF [Member] | Fair Value, Inputs, Level 1 [Member]    
Short-Term Investments [1] 4,857,652 11,874,272
Purchased Options Contracts [1] 16,000 35,625
Written Options Contracts [2] (18,867) (19,336)
Futures Contracts [3] (400,059) (326,457)
Total 4,454,726 11,564,104
BREAKWAVE DRY BULK SHIPPING ETF    
Short-Term Investments 2,556,475 1,095,625
Written Options Contracts
BREAKWAVE DRY BULK SHIPPING ETF | Fair Value, Inputs, Level 1 [Member]    
Short-Term Investments [1] 2,556,475 1,095,625
Futures Contracts (1,976,295) [3] 391,415 [4]
Total $ 580,180 $ 1,487,040
[1] Included in Investments in securities in the Combined Statements of Assets and Liabilities.
[2] Included in Options written, at fair value in the Combined Statements of Assets and Liabilities.
[3] Included in Payable on open futures contracts in the Combined Statements of Assets and Liabilities.
[4] Included in Receivable on open futures contracts in the Combined Statements of Assets and Liabilities.