Net Asset Value and Financial Highlights (Details) - $ / shares		3 Months Ended			9 Months Ended
		Mar. 31, 2018		Mar. 31, 2017	Mar. 31, 2018		Mar. 31, 2017
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Net Asset Value [Roll Forward]
Net asset value per Share, beginning of period		$ 25.00	[1]		$ 25.00
Net investment income (loss)		(0.06)	[1]		(0.06)
Net realized and unrealized gain (loss)		(2.40)	[1]		(2.40)
Net Income (Loss)		(2.46)	[1]		(2.46)
Net Asset Value per Share, end of period		22.54	[1]		22.54	[1]
Market Value per Share, end of period		$ 22.78	[1]		$ 22.78	[1]
Ratios to Average Net Assets [Roll Forward]
Expense Ratio	[2],[3]	10.99%	[1]		10.99%
Expense Ratio before Waiver/Assumption	[2],[3]	41.91%	[1]		41.91%
Net Investment Income (Loss)	[3]	(9.70%)	[1]		(9.70%)
Total Return, at Net Asset Value	[4]	(9.84%)	[1]		(9.84%)
Total Return, at Market Value	[4]	(8.88%)	[1]		(8.88%)
SIT RISING RATE ETF [Member]
Net Asset Value [Roll Forward]
Net asset value per Share, beginning of period		$ 23.65		$ 23.68	$ 23.15	[1]	$ 22.33
Net investment income (loss)		0.01		(0.07)	(0.05)	[1]	(0.24)
Net realized and unrealized gain (loss)		0.73		(0.25)	1.29	[1]	1.27
Net Income (Loss)		0.74		(0.32)	1.24	[1]	1.03
Net Asset Value per Share, end of period		24.39	[1]	23.36	24.39	[1]	23.36
Market Value per Share, end of period		$ 24.43	[1]	$ 23.41	$ 24.43	[1]	$ 23.41
Ratios to Average Net Assets [Roll Forward]
Expense Ratio	[2],[3]	1.11%		1.73%	1.53%	[1]	1.71%
Expense Ratio before Waiver/Assumption	[2],[3]	1.82%		3.11%	2.15%	[1]	4.37%
Net Investment Income (Loss)	[3]	0.19%		(1.21%)	(0.30%)	[1]	(1.39%)
Total Return, at Net Asset Value	[4]	3.13%		(1.33%)	5.36%	[1]	4.63%
Total Return, at Market Value	[4]	2.82%		(1.51%)	6.13%	[1]	4.79%

[1] Period from March 22, 2018 (commencement of investment operations) to March 31, 2018.

[2] For Sit Rising Rate ETF, as of February 19, 2015 and through December 31, 2017, Fund expenses had been capped at 1.50% of average daily net assets, plus commissions and interest, expense as disclosed in Note 4. Effective January 1, 2018, Fund expenses have been capped at 1.00% of average daily net assets, plus brokerage commissions and interest expense. For Breakwave Dry Bulk Shipping ETF, as of March 22, 2018 (commencement of investment operations), Fund expenses have been capped at 3.50% of average daily net assets, plus commissions and interest expense.

[3] Percentages are annualized.

[4] Percentages are not annualized.