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FINANCIAL HIGHLIGHTS (Tables) | 12 Months Ended
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Dec. 31, 2022
FINANCIAL HIGHLIGHTS |
Summary of per share performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended |  | Year ended |  | Year ended |
​ | ​ | December 31, 2022 | ​ | December 31, 2021 | ​ | December 31, 2020 |
Per Share Operating Performance: |  | ​ |  |  | ​ |  |  | ​ |  | ​
Net asset value, beginning of year | ​ | $ | 12.39 | ​ | $ | 9.20 | ​ | $ | 16.91 | ​
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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- Definition Tabular disclosure of per unit performance data and other supplemental financial data. + References No definition available. + Details
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