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FINANCIAL HIGHLIGHTS (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Per Share Operating Performance: |  |  |
Net asset value, beginning of year | $ 12.39 | $ 9.20 | $ 9.20
Total income (loss) | 2.06 | 3.33 | (7.55)
Total expenses | (0.23) | (0.14) | (0.16)
Net increase (decrease) in net asset value | 1.83 | 3.19 | (7.71)
Net asset value, end of year | $ 14.22 | $ 12.39 | $ 9.20
Total Return | 14.77% | 34.67% | (45.59%)
Ratios to Average Net Assets |  |  |
Total income (loss) | 17.00% | 6.56% | (49.07%)
Management fees | 0.60% | 0.60% | 0.60%
Total expenses excluding management fees | 0.46% | 0.51% | 0.75%
Net income (loss) | 15.94% | 5.45% | (50.42%)

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