Combined Statements of Assets and Liabilities (Unaudited) - USD ($)	Mar. 31, 2018	Jun. 30, 2017
Assets
Investment in securities, at fair value	$ 42,143,825	$ 20,319,994
Interest receivable	3,816	712
Segregated cash held by broker	2,162,042	521,215
Receivable on open futures contracts	1,126,975	21,795
Total assets	45,436,658	20,863,716
Liabilities
Options written, at fair value	56,469	3,477
Payable for Shares redeemed	1,126,975
Payable on open futures contracts	582,868
Due to Sponsor	36,256	25,260
Total liabilities	1,802,568	28,737
Net Assets	43,634,090	20,834,979
SIT RISING RATE ETF [Member]
Assets
Investment in securities, at fair value	39,891,510	20,319,994
Interest receivable	3,101	712
Segregated cash held by broker	678,391	521,215
Receivable on open futures contracts		21,795
Total assets	40,573,002	20,863,716
Liabilities
Options written, at fair value	56,469	3,477
Payable for Shares redeemed
Payable on open futures contracts	230,718
Due to Sponsor	33,900	25,260
Total liabilities	321,087	28,737
Net Assets	$ 40,251,915	$ 20,834,979
Shares outstanding (unlimited authorized)	1,650,040	900,040
Net asset value per share	$ 24.39	$ 23.15
Market value per share	$ 24.43	$ 23.02
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Assets
Investment in securities, at fair value	$ 2,252,315
Interest receivable	715
Segregated cash held by broker	1,483,651
Receivable on open futures contracts	1,126,975
Total assets	4,863,656
Liabilities
Options written, at fair value
Payable for Shares redeemed	1,126,975
Payable on open futures contracts	352,150
Due to Sponsor	2,356
Total liabilities	1,481,481
Net Assets	$ 3,382,175
Shares outstanding (unlimited authorized)	150,040
Net asset value per share	$ 22.54
Market value per share	$ 22.78