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FINANCIAL HIGHLIGHTS (Tables) | 6 Months Ended
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Jun. 30, 2023
FINANCIAL HIGHLIGHTS |
Schedule of per share performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Three months ended |  | Six months ended | ​ | Six months ended | ​
​ | ​ | June 30, 2023 | ​ | June 30, 2022 |  | June 30, 2023 | ​ | June 30, 2022 | ​
​ |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) | ​
Per Share Operating Performance: |  | ​ |  |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net asset value, beginning of period | ​ | $ | 11.66 | ​ | $ | 17.91 | ​ | $ | 17.24 | ​ | $ | 11.65 | ​
Total income (loss) | ​ |  | (0.13) | ​ |  | (0.18) | ​ | ​ | (5.68) | ​ | ​ | 6.11 | ​
Total expenses | ​ |  | (0.02) | ​ |  | (0.05) | ​ | ​ | (0.05) | ​ | ​ | (0.08) | ​
Net increase (decrease) in net asset value | ​ |  | (0.15) | ​ |  | (0.23) | ​ | ​ | (5.73) | ​ | ​ | 6.03 | ​
Net asset value, end of period | ​ | $ | 11.51 | ​ | $ | 17.68 | ​ | $ | 11.51 | ​ | $ | 17.68 | ​
​ | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | (1.29) | % |  | (1.28) | % | ​ | (33.24) | % | ​ | 51.76 | %
​ | ​ |  | ​ | ​ |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  | ​ | ​ |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income (loss) | ​ | ​ | (0.89) | % |  | (17.53) | % | ​ | (47.35) | % | ​ | 8.45 | %
Management fees# | ​ |  | 0.75 | % |  | 0.75 | % | ​ | 0.75 | % | ​ | 0.75 | %
Total expenses excluding management fees# | ​ |  | 0.92 | % |  | 0.64 | % | ​ | 0.88 | % | ​ | 0.58 | %
Expense waived# | ​ |  | (0.77) | % |  | (0.50) | % | ​ | (0.73) | % | ​ | (0.43) | %
Net expense excluding management fees# | ​ |  | 0.15 | % |  | 0.14 | % | ​ | 0.15 | % | ​ | 0.15 | %
Net income (loss) | ​ |  | (1.11) | % |  | (17.75) | % | ​ | (47.80) | % | ​ | 8.00 | %
# Annualized.

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