Note 6 - Financial Highlights - Summary of Financial Highlights (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|||||
| Net Asset Value per Share, beginning of period | $ 241 | $ 191.12 | $ 243.01 | $ 173.51 | ||||
| Net investment income/(loss) | (0.26) | (0.19) | (0.51) | (0.38) | ||||
| Net Realized and Change in Unrealized Gain/(Loss) | 46.54 | 14.07 | 44.78 | 31.87 | ||||
| Net Income/(Loss) | 46.28 | 13.88 | 44.27 | 31.49 | ||||
| Net Asset Value per Share, end of period | 287.28 | 205 | 287.28 | 205 | ||||
| Market Value per Share, beginning of period (in dollars per share) | 242.13 | 191.17 | 243.06 | 171.45 | ||||
| Market Value per Share, end of period (in dollars per share) | $ 288.14 | $ 205.72 | $ 288.14 | $ 205.72 | ||||
| Ratio to average net assets | ||||||||
| Net Investment loss(1) | [1] | (0.40%) | (0.40%) | (0.40%) | (0.40%) | |||
| Gross expenses(1) | [1] | 0.40% | 0.40% | 0.40% | 0.40% | |||
| Net expenses(1) | [1] | 0.40% | 0.40% | 0.40% | 0.40% | |||
| Total Return, at Net Asset Value(2) | [2] | 19.20% | 7.26% | 18.22% | 18.15% | |||
| Total Return, at Market Value(2) | [2] | 19.00% | 7.61% | 18.55% | 19.99% | |||
| ||||||||
| X | ||||||||||
- Definition Gross expenses to average net assets ratio. No definition available.
|
| X | ||||||||||
- Definition Percentage of expense, after incentive allocation, to average net assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Per share or unit amount of realized and unrealized gain (loss) on investment. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Per share or unit amount of investment income (loss) and realized and unrealized gain (loss) on investment. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Per-basic-share or unit amount, after investment expense, of dividend and interest investment income (loss) from investment held by investment company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Percentage of investment income (loss) to average net assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Market value per share of investment portfolio by investment company. Includes, but is not limited to, per unit, membership interest, or other ownership interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Percentage increase (decrease) in fund net asset value, assuming reinvestment of dividends and capital gain distributions. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Percentage increase (decrease) in portfolio market value assuming reinvestment of dividend and capital gain distribution. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|