v3.26.1
Average Annual Total Returns
 12 Months Ended 19 Months Ended 30 Months Ended 32 Months Ended
Feb. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
2x Bitcoin ETF          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return Before Taxes        
Average Annual Return, Percent   (38.71%)   42.97%  
Performance Inception Date Jun. 26, 2023        
2x Bitcoin ETF | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   (42.06%)   36.57%  
2x Bitcoin ETF | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Shares        
Average Annual Return, Percent   (22.01%)   32.37%  
2x Ether ETF          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return Before Taxes        
Average Annual Return, Percent   (64.33%) (65.78%)    
Performance Inception Date Jun. 03, 2024        
2x Ether ETF | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   (64.33%) (65.78%)    
2x Ether ETF | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Shares        
Average Annual Return, Percent   (38.09%) (45.97%)    
Volatility Premium Plus ETF          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return Before Taxes        
Average Annual Return, Percent   (10.48%)     15.51%
Performance Inception Date Apr. 17, 2023        
Volatility Premium Plus ETF | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions        
Average Annual Return, Percent   (11.45%)     10.49%
Volatility Premium Plus ETF | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Shares        
Average Annual Return, Percent   (6.18%)     10.14%
S&P CME Bitcoin Futures Daily Roll Index Excess Return (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P CME Bitcoin Futures Daily Roll Index Excess Return (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   (13.80%)   37.72%  
S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent   17.88% 19.38% 21.65% 21.99%
S&P 500® VIX Mid-Term Futures Inverse Daily Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Label [Optional Text] S&P 500® VIX Mid-Term Futures Inverse Daily Index (reflects no deduction for fees, expenses or taxes)        
Average Annual Return, Percent [1]   (11.52%)     14.11%
[1] On or about October 27, 2025, the Fund ceased tracking the S&P 500® VIX Mid-Term Futures Inverse Daily Index. Therefore, the Fund’s performance and historical returns shown for periods prior to October 27, 2025, are not indicative of the performance that the Fund, based on its current investment strategies, would have generated.