Combined Statements of Changes in Net Assets (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
SIT RISING RATE ETF [Member]
Net Assets at Beginning of Period	$ 51,774,988	$ 20,834,979
Increase (decrease) in Net Assets from share transactions
Addition of shares, respectively	11,786,052	6,825,745
Redemption of shares, respectively	(2,475,570)	(1,148,230)
Net Increase in Net Assets from share transactions	9,310,482	5,677,515
Increase (decrease) in Net Assets from operations
Net investment income (loss)	118,749	(35,883)
Net realized gain (loss)	(723,391)	(108,735)
Change in net unrealized gain (loss)	1,715,697	221,490
Net Increase in Net Assets from operations	1,111,055	76,872
Net Assets at End of Period	62,196,525	26,589,366
BREAKWAVE DRY BULK SHIPPING ETF [Member]
Net Assets at Beginning of Period	3,297,789
Increase (decrease) in Net Assets from share transactions
Addition of shares, respectively
Redemption of shares, respectively
Net Increase in Net Assets from share transactions
Increase (decrease) in Net Assets from operations
Net investment income (loss)	(27,280)
Net realized gain (loss)	303,269
Change in net unrealized gain (loss)	(170,585)
Net Increase in Net Assets from operations	105,404
Net Assets at End of Period	3,403,193
Net Assets at Beginning of Period	55,072,777	20,834,979
Addition of shares, respectively	11,786,052	6,825,745
Redemption of shares, respectively	(2,475,570)	(1,148,230)
Net Increase in Net Assets from share transactions	9,310,482	5,677,515
Net investment income (loss)	91,469	(35,883)
Net realized gain (loss)	(420,122)	(108,735)
Change in net unrealized gain (loss)	1,545,112	221,490
Net Increase in Net Assets from operations	1,216,459	76,872
Net Assets at End of Period	$ 65,599,718	$ 26,589,366