Combined Schedules of Investments (Unaudited)		9 Months Ended		12 Months Ended
		Mar. 31, 2018 USD ($) Number shares		Jun. 30, 2017 USD ($) Number shares
Investment Owned, at Fair Value		$ 43,634,090		$ 20,834,979
US Treasury Securities [Member]
Investment Owned, at Fair Value		38,482,558		19,957,000
Investment Owned, Balance, Principal Amount		38,480,873
SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		40,251,915		20,834,979
SIT RISING RATE ETF [Member] | US Treasury Securities [Member]
Investment Owned, at Fair Value		38,482,558		19,957,000
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, at Fair Value		3,382,175
U.S. Treasury 2 Year Note [Member]
Investment Owned, Appreciation/(Depreciation)		(230,718)
Purchased Options [Member]
Investment Owned, at Fair Value		27,828		72,703
Purchased Options [Member] | SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		$ 27,828		$ 72,703
Purchased Options [Member] | U.S. Treasury 10 Year Note [Member]
Investment Owned, Balance, Contracts | Number		137		47
Investment Owned, at Fair Value		$ 27,828		$ 72,703
Purchased Options [Member] | U.S. Treasury 10 Year Note [Member] | SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		27,828		72,703
Short-term Investments [Member]
Investment Owned, at Fair Value		3,633,439		290,291
Short-term Investments [Member] | US Treasury Securities [Member]
Investment Owned, at Fair Value		$ 38,482,558		19,957,000
Short-term Investments [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Balance, Shares | shares
Investment Owned, at Fair Value		$ 1,381,124		290,291
Short-term Investments [Member] | SIT RISING RATE ETF [Member] | US Treasury Securities [Member]
Investment Owned, at Fair Value		38,482,558		19,957,000
Investment Owned, Balance, Principal Amount		38,500,000		20,000,000
Short-term Investments [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, at Fair Value		2,252,315
Short-term Investments [Member] | First American US Treasury Money Market Fund [Member]
Investment Owned, at Fair Value		$ 1,381,124		$ 290,291
Short-term Investments [Member] | First American US Treasury Money Market Fund [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Balance, Shares | shares		1,381,124		290,291
Investment Owned, at Fair Value		$ 1,381,124		$ 290,291
Short-term Investments [Member] | First American US Treasury Money Market Fund [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Shares | shares		2,252,315
Investment Owned, at Fair Value		$ 2,252,315
Short-term Investments [Member] | First American US Treasury Money Market Fund [Member]
Investment Owned, at Fair Value		2,252,315
Investments [Member]
Investment Owned, at Fair Value		42,143,825		20,319,994
Investments [Member] | SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		39,891,510		20,319,994
Investments [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, at Fair Value		2,252,315
Assets in Excess of Other Liabilities [Member]
Investment Owned, at Fair Value		1,490,265	[1]	514,985	[2]
Assets in Excess of Other Liabilities [Member] | SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		360,405	[1]	514,985	[2]
Assets in Excess of Other Liabilities [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, at Fair Value	[1]	1,129,860
Short Futures Contracts [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Appreciation/(Depreciation)				$ 21,795
Short Futures Contracts [Member] | U.S. Treasury 5 Year Note [Member]
Investment Owned, Appreciation/(Depreciation)		$ (206,248)
Short Futures Contracts [Member] | U.S. Treasury 5 Year Note [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Balance, Contracts | Number		359		157
Investment Owned, Appreciation/(Depreciation)				$ (11,204)
Short Futures Contracts [Member] | U.S. Treasury 2 Year Note [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Balance, Contracts | Number		355		212
Investment Owned, Appreciation/(Depreciation)		$ (24,470)		$ 32,999
Futures Contracts [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Appreciation/(Depreciation)		$ (352,150)
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due April 30, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (43,700)
Investment Owned, Balance, Principal Amount		$ 500,800
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due May 31, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (31,500)
Investment Owned, Balance, Principal Amount		$ 513,000
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due June 29, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (41,100)
Investment Owned, Balance, Principal Amount		$ 503,400
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due April 30, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		10
Investment Owned, Appreciation/(Depreciation)		$ (8,400)
Investment Owned, Balance, Principal Amount		$ 116,100
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due May 31, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		10
Investment Owned, Appreciation/(Depreciation)		$ (6,100)
Investment Owned, Balance, Principal Amount		$ 118,400
Futures Contracts [Member] | Baltic Exchange Panamax T/C Average Shipping Route Index Due June 29, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		10
Investment Owned, Appreciation/(Depreciation)		$ (7,800)
Investment Owned, Balance, Principal Amount		$ 116,700
Futures Contracts [Member] | Baltic Capesize Time Charter Expiring April 30, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (175,450)
Investment Owned, Balance, Principal Amount		$ 436,800
Futures Contracts [Member] | Baltic Capesize Time Charter Expiring May 31, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (51,450)
Investment Owned, Balance, Principal Amount		$ 560,800
Futures Contracts [Member] | Baltic Capesize Time Charter Expiring June 29, 2018 [Member] | BREAKWAVE DRY BULK SHIPPING ETF [Member]
Investment Owned, Balance, Contracts | Number		40
Investment Owned, Appreciation/(Depreciation)		$ (13,350)
Investment Owned, Balance, Principal Amount		625,600
Written Options Contracts [Member] | SIT RISING RATE ETF [Member]
Investment Owned, at Fair Value		$ (56,469)
Written Options Contracts [Member] | U.S. Treasury 5 Year Note [Member] | SIT RISING RATE ETF [Member]
Investment Owned, Balance, Contracts | Number		139		89
Investment Owned, at Fair Value		$ (56,469)		$ (3,477)

[1] $678,391 and $1,483,651, respectively, of cash is pledged as collateral for futures contracts and written options

[2] $521,215 of cash is pledged as collateral for futures contracts and written options