v3.22.2.2
Statements of Changes in Net Assets (Parentheticals) - shares
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
BREAKWAVE DRY BULK SHIPPING ETF    
Addition during the period 4,850,000 4,450,000
Redemption during the period 6,075,000 6,250,000
ETF MANAGERS GROUP COMMODITY TRUST I    
Addition during the period 4,850,000  
Redemption during the period 6,075,000  
SIT RISING RATE ETF    
Addition during the period   0
Redemption during the period   250,040