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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2022
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Estimated directors fees and expenses $ 3,264 $ 2,874  
Licensing fee incurred $ 901 290  
Excess expenses percentage for reimbursement of expenses to others by the entity 0.15%    
Expense waiver $ 17,793 $ 30,045  
Licensing Agreements [Member]      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Fee percentage 0.015%    
UNL [Member]      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Percentage of contractual obligated to pay 0.75%    
Estimated directors fees and expenses     $ 4,000
Estimated costs     50,000
UNL [Member] | Related Public Funds [Member]      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Estimated directors fees and expenses     $ 1,258,000