Net Asset Value and Financial Highlights (Details) - $ / shares		3 Months Ended		9 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
SIT RISING RATE ETF [Member]
Net Asset Value
Net asset value per Share, beginning of period			$ 22.96		$ 22.7
Net investment income (loss)			0.02		0.14
Net realized and unrealized gain (loss)			(2.45)		(2.31)
Net Income (Loss)			(2.43)		(2.17)
Net Asset Value per Share, end of period			20.53		20.53
Market Value per Share, end of period			$ 20.53		$ 20.53
Ratios to Average Net Assets
Expense Ratio	[1]		1.08%		1.08%
Expense Ratio before Waiver/Assumption	[1]		8.41%		7.09%
Net Investment Income (Loss)	[1],[2]		0.43%		0.86%
Total Return, at Net Asset Value	[3]		(10.58%)		(9.56%)
Total Return, at Market Value	[3]		(10.62%)		(9.68%)
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Net Asset Value
Net asset value per Share, beginning of period		$ 7.93	$ 15.37	$ 7.7	$ 13.25
Net investment income (loss)		(0.16)	(0.11)	(0.31)	(0.34)
Net realized and unrealized gain (loss)		9.04	(8.76)	9.42	(6.41)
Net Income (Loss)		8.88	(8.87)	9.11	(6.75)
Net Asset Value per Share, end of period		16.81	6.5	16.81	6.5
Market Value per Share, end of period		$ 16.92	$ 6.39	$ 16.92	$ 6.39
Ratios to Average Net Assets
Expense Ratio	[1]	4.91%	7.04%	4.52%	6.19%
Expense Ratio before Waiver/Assumption	[1]	5.16%	12.37%	4.69%	17.62%
Net Investment Income (Loss)	[1],[2]	(4.90%)	(6.10%)	(4.52%)	(4.96%)
Total Return, at Net Asset Value	[3]	111.98%	(57.71%)	118.31%	(50.94%)
Total Return, at Market Value	[3]	119.74%	(58.64%)	128.96%	(51.41%)

[1] For Breakwave Dry Bulk Shipping ETF, Fund expenses have been capped at 3.50% of average daily net assets, plus brokerage commissions, interest expense, and extraordinary expenses, if any. Prior to the liquidation of Sit Rising Rate ETF, Fund expenses had been capped at 1.00% of average daily net assets, plus brokerage commissions, interest expense, and extraordinary expenses.

[2] Percentages are annualized.

[3] Percentages are not annualized.