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ORGANIZATION AND BUSINESS (Details)
 1 Months Ended 12 Months Ended
Jan. 04, 2018
Apr. 30, 2007
shares
Apr. 18, 2007
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
contract
$ / shares
shares
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
Dec. 31, 2018
$ / shares
ORGANIZATION AND BUSINESS                
Number of successive valuation days       30 days        
Average daily percentage change in the price of the Benchmark Futures Contract considered       10.00%        
Number of Contracts | contract       9,597        
Number of units per basket       100,000        
Fee paid by authorized participants for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $       $ 1,000        
Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission   30,000,000            
Reverse share split 0.25              
Net asset value per unit | $ / shares     $ 50.00 $ 14.22 $ 12.39 $ 9.20 $ 9.20 $ 16.91
Number of units issued     200,000          
Value of unit issued | $     $ 10,001,000          
Number of registered units       2,280,000,000        
Creation Baskets                
ORGANIZATION AND BUSINESS                
Number of units per basket       100,000        
Redemption Baskets                
ORGANIZATION AND BUSINESS                
Number of units per basket       100,000