Fair Value of ETC - Additional Information (Detail) |
Dec. 31, 2025
ETC
$ / shares
|
Dec. 31, 2024
ETC
$ / shares
|
Dec. 31, 2023
ETC
$ / shares
|
|---|---|---|---|
| Fair Value Disclosures [Abstract] | |||
| Investment owned balance shares held by custodian | ETC | 10,985,516.92607291 | 11,263,626.2550315 | 11,548,776.1723 |
| Ethereum classic Fair Value Per Share | $ / shares | $ 11.47 | $ 25.13 | $ 21.99 |