v3.26.1
Fair Value of ZEC - Summary of changes in quantity of ZEC and the respective fair value (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
USD ($)
Zec
Mar. 31, 2025
USD ($)
Zec
Fair Value Disclosures [Abstract]    
Investment Owned, Balance | Zec 393,522.33134026 392,723.58934327
ZEC contributed | Zec 0 4,888.2327252
ZEC distributed for Sponsor's Fee, related party | Zec (2,418.44364908) (2,427.56268494)
Net change in unrealized appreciation/depreciation on investment in ZEC | Zec 0 0
Net realized gain (loss) on investment in ZEC | Zec 0 0
Investment Owned, Balance | Zec 391,103.88769118 395,184.25938353
Investment Owned, at Fair Value | $ $ 200,441 $ 22,040
ZEC contributed | $ 0 191
ZEC distributed for Sponsor's Fee, related party | $ (720) (96)
Net change in unrealized appreciation/depreciation on investment in ZEC | $ (100,700) (6,884)
Net realized gain (loss) on investment in ZEC | $ 425 (202)
Investment Owned, at Fair Value | $ $ 99,446 $ 15,049