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FINANCIAL HIGHLIGHTS (Details) - $ / shares
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Per Share Operating Performance:    
Net asset value, beginning of period $ 8.58 $ 17.24
Total income (loss) (0.79) (5.55)
Total expenses (0.02) (0.03)
Net increase (decrease) in net asset value (0.81) (5.58)
Net asset value, end of period $ 7.77 $ 11.66
Total Return (9.44%) (32.37%)
Ratios to Average Net Assets    
Total income (loss) (13.18%) (44.62%)
Management fees 0.75% 0.75%
Total expenses excluding management fees 1.61% 0.84%
Expense waived (1.46%) (0.69%)
Net expense excluding management fees 0.15% 0.15%
Net income (loss) (13.40%) (44.84%)