Statements of Changes in Net Assets (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
SIT RISING RATE ETF [Member]
Net Assets at Beginning of Period	$ 20,834,979	$ 16,745,969
Increase (decrease) in Net Assets from share transactions
Addition of 300,000, -0-, 300,000, and -0- shares, respectively	6,825,745
Redemption of 50,000, 300,000, 50,000 and 300,000 shares, respectively	(1,148,230)	(6,751,830)
Net increase (decrease) in Net Assets from share transactions	5,677,515	(6,751,830)
Increase (decrease) in Net Assets from operations
Net investment loss	(35,883)	(48,507)
Net realized loss	(108,735)	(66,126)
Change in net unrealized gain	221,490	273,867
Net increase in Net Assets from operations	76,872	159,234
Net Assets at End of Period	26,589,366	10,153,373
ETF MANAGERS GROUP COMMODITY TRUST I [Member]
Net Assets at Beginning of Period	20,834,979	16,745,969
Increase (decrease) in Net Assets from share transactions
Addition of 300,000, -0-, 300,000, and -0- shares, respectively	6,825,745
Redemption of 50,000, 300,000, 50,000 and 300,000 shares, respectively	(1,148,230)	(6,751,830)
Net increase (decrease) in Net Assets from share transactions	5,677,515	(6,751,830)
Increase (decrease) in Net Assets from operations
Net investment loss	(35,883)	(48,507)
Net realized loss	(108,735)	(66,126)
Change in net unrealized gain	221,490	273,867
Net increase in Net Assets from operations	76,872	159,234
Net Assets at End of Period	$ 26,589,366	$ 10,153,373