Creations and Redemptions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
SIT RISING RATE ETF [Member]
Shares Sold, Shares		500,000		775,000
Shares Redeemed, Shares	(25,000)	(475,000)	(275,000)	(525,000)
Net Increase (Decrease), Shares	(25,000)	25,000	(275,000)	250,000
Shares Sold, Capital Increase (Decrease)		$ 12,510,953		$ 24,297,005
Shares Redeemed, Capital Increase (Decrease)	(577,766)	(11,687,830)	(6,331,666)	(14,163,400)
Net Increase (Decrease), Capital Increase (Decrease)	$ (577,766)	$ 823,123	$ (6,331,666)	$ 10,133,605
BREAKWAVE DRY BULK SHIPPING ETF
Shares Sold, Shares	75,000		75,000
Shares Redeemed, Shares	(25,000)		(250,000)
Net Increase (Decrease), Shares	50,000		(175,000)
Shares Sold, Capital Increase (Decrease)	$ 1,151,130		$ 1,151,130
Shares Redeemed, Capital Increase (Decrease)	(431,515)		(4,121,777)
Net Increase (Decrease), Capital Increase (Decrease)	$ 719,615		$ (2,970,647)