v3.26.3
Significant Accounting Policies - Schedule of Changes in Quantity of AVAX and Fair Value (Details)
 1 Months Ended 9 Months Ended
Dec. 31, 2025
USD ($)
Avalanche
shares
Sep. 30, 2026
USD ($)
Avalanche
shares
Quantity of Avax [Member]    
Significant Accounting Policies [Abstract]    
Beginning balance (in Avalanche) | Avalanche 0 [1] 206,019.9
AVAX purchased (in Avalanche) | Avalanche 206,019.9 559,830.28
AVAX purchased in-kind (in Avalanche) | Avalanche   1,242,626.55
AVAX sold (in Avalanche) | Avalanche 0 (22,875.05)
AVAX sold in-kind (in Avalanche) | Avalanche   0
Net change in unrealized appreciation (depreciation) from investment in AVAX (in Shares) | shares 0 0
Net realized gain (loss) on investment in AVAX (in Shares) | shares 0 0
Ending balance (in Avalanche) | Avalanche 206,019.9 1,985,601.68
Fair Value [Member]    
Significant Accounting Policies [Abstract]    
Beginning balance, Fair Value $ 0 [1] $ 2,517,563
AVAX purchased 2,500,000 5,598,904
AVAX purchased in-kind   11,104,040
AVAX sold 0 (161,770)
AVAX sold in-kind   0
Net change in unrealized appreciation (depreciation) from investment in AVAX 17,563 3,063,339
Net realized gain (loss) on investment in AVAX 0 (57,077)
Ending balance, Fair Value $ 2,517,563 $ 22,064,999
[1] The Trust did not hold any AVAX as of November 20, 2025 (Date of Seeding).