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ORGANIZATION AND BUSINESS - Additional Information (Details)
Dec. 06, 2007
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
$ / shares
$ / item
shares
Dec. 31, 2021
$ / shares
Mar. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Jun. 30, 2020
$ / shares
Dec. 04, 2007
shares
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]              
Number of oil futures contracts for light, sweet crude oil traded on the NYMEX   1,547          
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets   $ 350          
Number of shares per basket | $ / item   50,000          
Net asset value per share | $ / shares $ 50.00 $ 36.99 $ 27.81 $ 20.89 $ 17.23 $ 27.81  
Number of shares issued | shares 300,000            
Value of shares issued $ 15,000,000            
Number of registered shares | shares   311,000,000         11,000,000
Creation Baskets              
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]              
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets   $ 350          
Number of shares per basket | $ / item   50,000