Schedule of Investments (Unaudited) - SIT RISING RATE ETF [Member]	3 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) Number shares		Jun. 30, 2017 USD ($) Number shares
Investment Owned, at Fair Value	$ 26,589,366		$ 20,834,979
US Treasury Securities [Member]
Investment Owned, at Fair Value	25,484,168		19,957,000
Purchased Options [Member]
Investment Owned, at Fair Value	$ 89,063		$ 72,703
Purchased Options [Member] | U.S. Treasury 10 Year Note [Member]
Investment Owned, Balance, Contracts | Number	50		47
Investment Owned, at Fair Value	$ 89,063		$ 72,703
Short-term Investments [Member]
Investment Owned, at Fair Value	$ 415,048		$ 290,291
Short-term Investments [Member] | First American US Treasury Money Market Fund [Member]
Investment Owned, Balance, Shares | shares	415,048	[1]	290,291	[2]
Investment Owned, at Fair Value	$ 415,048	[1]	$ 290,291	[2]
Short-term Investments [Member] | US Treasury Securities [Member]
Investment Owned, at Fair Value	25,484,168		19,957,000
Investment Owned, Balance, Principal Amount	25,500,000		20,000,000
Investments [Member]
Investment Owned, at Fair Value	25,988,279		20,319,994
Assets in Excess of Other Liabilities [Member]
Investment Owned, at Fair Value	601,087	[3]	514,985	[4]
Written Options Contracts [Member]
Investment Owned, at Fair Value	$ (8,500)		$ (3,477)
Written Options Contracts [Member] | U.S. Treasury 5 Year Note [Member]
Investment Owned, Balance, Contracts | Number	68		89
Investment Owned, at Fair Value	$ (8,500)		$ (3,477)
Short Futures Contracts [Member]
Investment Owned, Appreciation/(Depreciation)	$ 240,407		$ 21,795
Short Futures Contracts [Member] | U.S. Treasury 5 Year Note [Member]
Investment Owned, Balance, Contracts | Number	233		157
Investment Owned, Appreciation/(Depreciation)	$ 131,954		$ (11,204)
Short Futures Contracts [Member] | U.S. Treasury 2 Year Note [Member]
Investment Owned, Balance, Contracts | Number	241		212
Investment Owned, Appreciation/(Depreciation)	$ 108,453		$ 32,999

[1] Annualized seven-day yield as of September 30, 2017

[2] Annualized seven-day yield as of June 30, 2017

[3] $399,143 of cash is pledged as collateral for futures contracts and written options

[4] $521,215 of cash is pledged as collateral for futures contracts and written options