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Statements of Changes in Shareholders' Capital (Parenthetical) - shares | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Mar. 31, 2015 | Mar. 31, 2016 | Mar. 31, 2016
SIT RISING RATE ETF [Member] |  |  |
Stock Issued During Period, Shares, New Issues | 50,000 | 100,000 | 600,000
ETF MANAGERS GROUP COMMODITY TRUST I [Member] |  |  |
Stock Issued During Period, Shares, New Issues | 50,000 | 100,000 | 600,000

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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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