FINANCIAL HIGHLIGHTS (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Per Share Operating Performance: | ||||
| Net asset value, beginning of year | $ 6.9 | $ 10.26 | $ 7.34 | $ 8.12 |
| Total income (loss) | (0.45) | (1.49) | (0.86) | 0.68 |
| Total expenses | (0.03) | (0.04) | (0.06) | (0.07) |
| Net increase (decrease) in net asset value | (0.48) | (1.53) | (0.92) | 0.61 |
| Net asset value, end of year | $ 6.42 | $ 8.73 | $ 6.42 | $ 8.73 |
| Total Return | (6.96%) | (14.91%) | (12.53%) | 7.51% |
| Ratios to Average Net Assets | ||||
| Total income (loss) | (6.21%) | (18.24%) | (9.66%) | 12.58% |
| Management fees | 0.60% | 0.60% | 0.60% | 0.60% |
| Total expenses excluding management fees | 1.42% | 1.02% | 1.19% | 0.87% |
| Net income (loss) | (6.71%) | (18.65%) | (10.55%) | 11.85% |