Combined Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows provided by (used in) operating activities
Net income (loss)	$ 1,394,011	$ 389,584
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments	(2,183,870)	(521,605)
Change in net unrealized appreciation (depreciation) on investments	720,335	3,057
Change in operating assets and liabilities:
Sale (Purchase) of investments, net	(20,360,296)	(1,369,420)
Increase in interest receivable	(3,104)	(86)
Increase (decrease) in segregated cash held by broker	(1,640,827)	15,656
Increase (Decrease) in options written, at fair value	52,992	(65,031)
Increase in receivable for Shares purchased	(1,126,975)
Increase in payable for Shares redeemed	1,126,975
Decrease (Increase) in receivable on open futures contracts	21,795
Decrease (Increase) in payable on open futures contracts	582,868	(9,233)
Increase in due to Sponsor	10,996	148
Net cash provided by (used in) operating activities	(21,405,100)	(1,556,930)
Cash flows from financing activities
Proceeds from sale of shares	28,355,065	9,465,000
Paid on redemption of shares	(6,950,965)	(7,908,070)
Net cash provided by financing activities	21,404,100	1,556,930
Net increase (decrease) in cash	(1,000)
Cash, beginning of period	1,000
Cash, end of period
SIT RISING RATE ETF [Member]
Cash flows provided by (used in) operating activities
Net income (loss)	1,754,151	389,584
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments	(2,183,870)	(521,605)
Change in net unrealized appreciation (depreciation) on investments	368,185	3,057
Change in operating assets and liabilities:
Sale (Purchase) of investments, net	(17,755,831)	(1,369,420)
Increase in interest receivable	(2,389)	(86)
Increase (decrease) in segregated cash held by broker	(157,176)	15,656
Increase (Decrease) in options written, at fair value	52,992	(65,031)
Increase in receivable for Shares purchased
Increase in payable for Shares redeemed
Decrease (Increase) in receivable on open futures contracts	21,795
Decrease (Increase) in payable on open futures contracts	230,718	(9,233)
Increase in due to Sponsor	8,640	148
Net cash provided by (used in) operating activities	(17,662,785)	(1,556,930)
Cash flows from financing activities
Proceeds from sale of shares	23,486,775	9,465,000
Paid on redemption of shares	(5,823,990)	(7,908,070)
Net cash provided by financing activities	17,662,785	1,556,930
Net increase (decrease) in cash
Cash, beginning of period
Cash, end of period
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Cash flows provided by (used in) operating activities
Net income (loss)	(360,140)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments
Change in net unrealized appreciation (depreciation) on investments	352,150
Change in operating assets and liabilities:
Sale (Purchase) of investments, net	(2,604,465)
Increase in interest receivable	(715)
Increase (decrease) in segregated cash held by broker	(1,483,651)
Increase (Decrease) in options written, at fair value
Increase in receivable for Shares purchased	(1,126,975)
Increase in payable for Shares redeemed	1,126,975
Decrease (Increase) in receivable on open futures contracts
Decrease (Increase) in payable on open futures contracts	352,150
Increase in due to Sponsor	2,356
Net cash provided by (used in) operating activities	(3,742,315)
Cash flows from financing activities
Proceeds from sale of shares	4,868,290
Paid on redemption of shares	(1,126,975)
Net cash provided by financing activities	3,741,315
Net increase (decrease) in cash	(1,000)
Cash, beginning of period	1,000
Cash, end of period