Schedule of Investments (Parentheticals) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
BREAKWAVE DRY BULK SHIPPING ETF [Member]
American US Treasury Obligations Fund, Shares (in Shares)	17,208,763
Net Assets Percentage	100.00%	100.00%
ETF MANAGERS GROUP COMMODITY TRUST I [Member]
American US Treasury Obligations Fund, Shares (in Shares)	17,208,763
Net Assets Percentage	100.00%	100.00%
Money Market Funds [Member] \| BREAKWAVE DRY BULK SHIPPING ETF [Member]
Money Market Funds, Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Investment Cost (in Dollars)	42,654,058	42,654,058
Money Market Funds [Member] \| ETF MANAGERS GROUP COMMODITY TRUST I [Member]
Money Market Funds, Cost (in Dollars)	42,654,058	42,654,058
Investment Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Money Market Funds [Member] \| First American US Treasury Obligations Fund, Class X [Member] \| BREAKWAVE DRY BULK SHIPPING ETF [Member]
American US Treasury Obligations Fund, Percentage	37.00%	37.40%
American US Treasury Obligations Fund, Par Value Percentage	1.31%	0.01%
American US Treasury Obligations Fund, Shares (in Shares)		42,654,058
Money Market Funds [Member] \| First American US Treasury Obligations Fund, Class X [Member] \| ETF MANAGERS GROUP COMMODITY TRUST I [Member]
American US Treasury Obligations Fund, Percentage	37.00%	37.40%
American US Treasury Obligations Fund, Par Value Percentage	1.31%	0.01%
American US Treasury Obligations Fund, Shares (in Shares)		42,654,058
Investments [Member] \| BREAKWAVE DRY BULK SHIPPING ETF [Member]
Money Market Funds, Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Investment Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Investment Percentage	37.00%	37.40%
Investments [Member] \| ETF MANAGERS GROUP COMMODITY TRUST I [Member]
Money Market Funds, Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Investment Cost (in Dollars)	$ 42,654,058	$ 42,654,058
Investment Percentage	37.00%	37.40%
Other Assets in Excess of Liabilities [Member] \| BREAKWAVE DRY BULK SHIPPING ETF [Member]
Assets in Excess of Liabilities Percentage	63.00%	62.60%
Other Assets in Excess of Liabilities [Member] \| ETF MANAGERS GROUP COMMODITY TRUST I [Member]
Assets in Excess of Liabilities Percentage	63.00%	62.60%