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Significant Accounting Policies (Tables) | 6 Months Ended
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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.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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