Document And Entity Information - USD ($)
12 Months Ended
Jun. 30, 2022
Sep. 01, 2022
Dec. 31, 2021
Document Information Line Items      
Entity Registrant Name ETF Managers Group Commodity Trust I    
Trading Symbol BDRY    
Document Type 10-K    
Current Fiscal Year End Date --06-30    
Entity Common Stock, Shares Outstanding   3,375,040  
Entity Public Float     $ 70,776,050
Amendment Flag false    
Entity Central Index Key 0001610940    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jun. 30, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-36851    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 36-4793446    
Entity Address, Address Line One 30 Maple Street    
Entity Address, Address Line Two Suite 2    
Entity Address, City or Town Summit    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 07901    
City Area Code (908)    
Local Phone Number 897-0518    
Title of 12(b) Security Shares of Breakwave Dry Bulk Shipping ETF    
Security Exchange Name NYSEArca    
Entity Interactive Data Current Yes    
Auditor Name WithumSmith+Brown, PC    
Auditor Location New York, NY    
Auditor Firm ID 100