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FINANCIAL HIGHLIGHTS (Details) - $ / shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Per Share Operating Performance:      
Net asset value, beginning of year $ 8.58 $ 17.24 $ 11.65
Total income (loss) (0.33) (8.56) 5.78
Total expenses (0.13) (0.1) (0.19)
Net increase (decrease) in net asset value (0.46) (8.66) 5.59
Net asset value, end of year $ 8.12 $ 8.58 $ 17.24
Total Return (5.36%) (50.23%) 47.98%
Ratios to Average Net Assets      
Total income (loss) (5.11%) (75.12%) 11.13%
Management fees 0.65% 0.75% 0.75%
Total expenses excluding management fees 1.42% 1.11% 0.61%
Expense waived (0.45%) (0.96%) (0.46%)
Net expense excluding management fees 0.97% 0.15% 0.15%
Net income (loss) (6.73%) (76.02%) 10.23%