Fair Value of Bitcoin - Additional Information (Details) |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jun. 30, 2026
USD ($)
Bitcoin
$ / shares
|
Dec. 31, 2025
USD ($)
Bitcoin
$ / shares
|
Dec. 31, 2024
Bitcoin
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Trust held net closing balance of bitcoin | Bitcoin | 36,207.6919 | 38,468.0468 | 40,289.1335 |
| Fair value net realized losses | $ 11,599,398 | ||
| Fair value net of cumulative realized gains | 50,827,151 | ||
| Fair value cumulative realized losses | 39,227,753 | ||
| CME CF Bitcoin | |||
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Fair value of bitcoins acquired | $ 2,121,966,631 | $ 3,358,857,898 | |
| Bitcoin index price per share | $ / shares | $ 58,605.41 | $ 87,315.53 | |
| Lukka Prime Rate | |||
| Fair Value, Option, Quantitative Disclosures [Line Items] | |||
| Fair value of bitcoins acquired | $ 2,125,990,030 | $ 3,367,646,692 | |
| Bitcoin index price per share | $ / shares | $ 58,716.53 | $ 87,544 |