Creations and Redemptions (Details Textual) - USD ($)	Dec. 31, 2019	Aug. 17, 2018
SIT RISING RATE ETF [Member]
Creations and Redemptions (Textual)
Number of shares in one or more baskets	25,000
BREAKWAVE DRY BULK SHIPPING ETF
Creations and Redemptions (Textual)
Number of shares in one or more baskets		50,000
Authorized participant transaction fee per order	$ 500