| Form N-CSR Cover | 6 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 6 Months Ended |
| Oct. 31, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Ionic Inflation Protection ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Ionic Inflation Protection ETF |
| Class Name | Iconic Inflation Protection ETF |
| Trading Symbol | CPII |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.cpiietf.com (866) 214-2234 |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund. |
| Additional Information Phone Number | (866) 214-2234 |
| Additional Information Website | www.cpiietf.com |
| Expenses [Text Block] | What were the Fund costs for the past six months? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Ionic Inflation Protection ETF $37 0.75% Costs paid as a percentage of a $10,000 investment is an annualized figure. |
| Expenses Paid, Amount | $ 37 |
| Expense Ratio, Percent | 0.75% |
| Net Assets | $ 12,264,000 |
| Holdings Count | Holdings | 11 |
| Investment Company, Portfolio Turnover | 37% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of October 31, 2024 ) Fund Size (Thousands) $12,264 Number of Holdings 11 Portfolio Turnover 37% |
| Holdings [Text Block] | Sector Breakdown (% of total portfolio) Sector/Security Type % of Total Portfolio U.S. Treasury Securities 0.95 Purchased Options 0.02 Cash & Cash Equivalents 0.03 Percentages are based on total net assets. Cash & Cash Equivalents represents short-term investments and other assets in excess of liabilities including unrealized appreciation on inflation swaps. |
| Largest Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024 ) Top Ten Holdings (% of net assets) United States Treasury Inflation Indexed Bonds, 0.25%, 01/15/2025 11.4 United States Treasury Inflation Indexed Bonds, 0.13%, 04/15/2025 11.5 United States Treasury Inflation Indexed Bonds, 0.38%, 07/15/2025 1.9 United States Treasury Inflation Indexed Bonds, 0.13%, 10/15/2025 12.3 United States Treasury Inflation Indexed Bonds, 0.63%, 01/15/2026 12.3 United States Treasury Inflation Indexed Bonds, 0.13%, 04/15/2026 10.9 United States Treasury Inflation Indexed Bonds, 0.13%, 07/15/2026 12.0 United States Treasury Inflation Indexed Bonds, 0.13%, 10/15/2026 12.4 5-Year Interest Rate Swap, Counterparty: J.P. Morgan Securities, Inc., Receive SOFR; Expiration: 07/02/2026; Exercise Rate: 0% 1.05 5-Year Interest Rate Swap, Counterparty: Bank of America, Receive SOFR; Expiration: 07/02/2026; Exercise Rate: 0% 1.02 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain planned changes to the Fund. For more complete information, you may review the Fund’s prospectus, as supplemented. The Board of Trustees of Tidal ETF Trust has approved an Agreement and Plan of Reorganization and Termination between the Trust, (the “Plan of Reorganization”) providing for the reorganization of the Fund, a series of the Trust, into the American Beacon Ionic Inflation Protection ETF (the “Acquiring Fund”), a series of American Beacon Select Funds. The Plan of Reorganization was subsequently approved by the written consent of shareholders owning a majority of the Fund’s outstanding shares. Following the Reorganization, Ionic will continue serving as the investment sub-adviser to the Acquiring Fund, with responsibility for determining the securities purchased and sold by the Acquiring Fund. American Beacon Advisors, Inc. will serve as investment adviser to the Acquiring Fund. The Acquiring Fund will be managed in accordance with the same investment objectives and substantially similar principal investment strategies as the Fund. The Reorganization is expected to occur on or after March 7, 2025. |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with accountants. |
| Shareholder Report, Holdings (Details) - Ionic Inflation Protection ETF | Oct. 31, 2024 |
| United States Treasury Inflation Indexed Bonds, 0.25%, 01/15/2025 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| United States Treasury Inflation Indexed Bonds, 0.13%, 04/15/2025 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| United States Treasury Inflation Indexed Bonds, 0.38%, 07/15/2025 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| United States Treasury Inflation Indexed Bonds, 0.13%, 10/15/2025 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| United States Treasury Inflation Indexed Bonds, 0.63%, 01/15/2026 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| United States Treasury Inflation Indexed Bonds, 0.13%, 04/15/2026 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| United States Treasury Inflation Indexed Bonds, 0.13%, 07/15/2026 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| United States Treasury Inflation Indexed Bonds, 0.13%, 10/15/2026 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.40% |
| 5-Year Interest Rate Swap, Counterparty: J.P. Morgan Securities, Inc., Receive SOFR; Expiration: 07/02/2026; Exercise Rate: 0% [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.05% |
| 5-Year Interest Rate Swap, Counterparty: Bank of America, Receive SOFR; Expiration: 07/02/2026; Exercise Rate: 0% [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.02% |
| US Treasury Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 95% |
| Purchased Options [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
