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Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2023
Significant Accounting Policies [Abstract]  
Schedule of Cut-Off Times and the Times of the Calculation of the Funds The cut-off times and the times of the calculation of the Funds’ final net asset value for creation and redemption of fund Shares for the three months ended June 30, 2023 were typically as follows. All times are Eastern Standard Time:
      NAV  NAV
   Create/Redeem  Calculation  Calculation
Fund  Cut-off*(EST)  Time (EST)  Date
-1x Short VIX Futures ETF and  2:00 p.m.  4:00 p.m.  June 30, 2023
2x Long VIX Futures ETF  2:00 p.m.  4:00 p.m.  June 30, 2023
*Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the three months ended June 30, 2023.
Schedule of Valuation of Investments at Using the Fair Value Hierarchy The following table summarizes the valuation of investments at June 30, 2023 (unaudited) and December 31, 2022 using the fair value hierarchy:
   June 30, 2023 (Unaudited)   December 31, 2022 
Fund  Level 1 -
Money
Market
Fund		   Level 2 -
Futures
Contracts*		   Total
June 30,
2023		   Level 1 -
Money
Market
Fund		   Level 2 -
Futures
Contracts*		   Total
December 31,
2022		 
-1x Short VIX Futures ETF  $
–
   $6,518,579   $6,518,579   $-   $1,156,106   $1,156,106 
2x Long VIX Futures ETF  $9,517,548    (19,791,036)   (10,273,488)   8,250,285    (9,203,522)   (953,237)
Total Trust  $9,517,548   $(13,272,457)  $(3,754,909)  $8,250,285   $(8,047,416)  $202,869 
*Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.