Combined Statements of Cash Flows - USD ($)	9 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Cash flows provided by (used in) operating activities
Net income (loss)	$ (4,189,881)	$ (4,313,305)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments	2,809,503	4,305,648
Change in net unrealized loss (gain) on investments	1,281,131	377,679
Change in operating assets and liabilities:
Sale (purchase) of investments, net	1,484,761	17,854,599
Increase in Deposits with brokers for futures		(2,323,128)
Increase in Variation Margin on futures		(115,742)
Decrease in interest receivable	4,077	(797)
Decrease in segregated cash held by broker	(12,230,348)	3,328,612
Decrease in receivable on open futures contracts		81,680
Increase in other assets		(21,906)
Decrease in options written, at fair value	(469)	(16,953)
Increase in payable for Fund shares redeemed		4,706,340
Decrease in Variation Margin on futures		198,550
Increase (decrease) in receivable on open futures contracts	(2,856,535)
Increase (decrease) in payable on open futures contracts	2,049,897	(698,426)
Decrease in due to Sponsor	24,177	(13,954)
Increase (Decrease) in other liabilities and accrued expenses	9,680	23,100
Net cash provided by (used in) operating activities	(11,614,007)	23,371,997
Cash flows from financing activities
Proceeds from sale of shares	22,763,000	26,092,808
Paid on redemption of shares	(11,148,993)	(44,791,745)
Net cash provided by (used in) financing activities	11,614,007	(18,698,937)
Net increase (decrease) in cash		4,673,060
Cash, beginning of period		33,280
Cash, end of period		4,706,340
SIT RISING RATE ETF
Cash flows provided by (used in) operating activities
Net income (loss)	(454,812)	(2,313,788)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments	420,623	2,914,522
Change in net unrealized loss (gain) on investments	76,566	(167,281)
Change in operating assets and liabilities:
Sale (purchase) of investments, net	6,539,056	19,637,714
Increase in Deposits with brokers for futures		(144,758)
Increase in Variation Margin on futures		(115,742)
Decrease in interest receivable	410	(751)
Decrease in segregated cash held by broker	(317,893)	1,386,738
Decrease in receivable on open futures contracts
Increase in other assets
Decrease in options written, at fair value	(469)	(16,953)
Increase in payable for Fund shares redeemed		4,706,340
Decrease in Variation Margin on futures
Increase (decrease) in receivable on open futures contracts
Increase (decrease) in payable on open futures contracts	73,602	(698,426)
Decrease in due to Sponsor	(5,417)	(12,824)
Increase (Decrease) in other liabilities and accrued expenses		26,289
Net cash provided by (used in) operating activities	6,331,666	25,201,080
Cash flows from financing activities
Proceeds from sale of shares		24,297,005
Paid on redemption of shares	(6,331,666)	(44,791,745)
Net cash provided by (used in) financing activities	(6,331,666)	(20,494,740)
Net increase (decrease) in cash		4,706,340
Cash, beginning of period
Cash, end of period		4,706,340
BREAKWAVE DRY BULK SHIPPING ETF
Cash flows provided by (used in) operating activities
Net income (loss)	(3,735,069)	(1,999,517)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net realized loss (gain) on investments	2,388,880	1,391,126
Change in net unrealized loss (gain) on investments	1,204,565	544,960
Change in operating assets and liabilities:
Sale (purchase) of investments, net	(5,054,295)	(1,783,115)
Increase in Deposits with brokers for futures		(2,178,370)
Increase in Variation Margin on futures
Decrease in interest receivable	3,667	(46)
Decrease in segregated cash held by broker	(11,912,455)	1,941,874
Decrease in receivable on open futures contracts		81,680
Increase in other assets		(21,906)
Decrease in options written, at fair value
Increase in payable for Fund shares redeemed
Decrease in Variation Margin on futures		198,550
Increase (decrease) in receivable on open futures contracts	(2,856,535)
Increase (decrease) in payable on open futures contracts	1,976,295
Decrease in due to Sponsor	29,594	(1,130)
Increase (Decrease) in other liabilities and accrued expenses	9,680	(3,189)
Net cash provided by (used in) operating activities	(17,945,673)	(1,829,083)
Cash flows from financing activities
Proceeds from sale of shares	22,763,000	1,795,803
Paid on redemption of shares	(4,817,327)
Net cash provided by (used in) financing activities	17,945,673	1,795,803
Net increase (decrease) in cash		(33,280)
Cash, beginning of period		33,280
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