| Form N-CSR Cover | 12 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Document Period End Date | Jul. 31, 2024 |
| FolioBeyond Alternative Income and Interest Rate Hedge ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | FolioBeyond Alternative Income and Interest Rate Hedge ETF |
| Class Name | FolioBeyond Alternative Income and Interest Rate Hedge ETF |
| Trading Symbol | RISR |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.etfs.foliobeyond.com (866) 497-4963 |
| Additional Information Phone Number | (866) 497-4963 |
| Additional Information Website | www.etfs.foliobeyond.com |
| Expenses [Text Block] | What were the Fund costs for the past year? (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 FolioBeyond Alternative Income and Interest Rate Hedge ETF $121 1.22% |
| Expenses Paid, Amount | $ 121 |
| Expense Ratio, Percent | 1.22% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? For the year ended July 31, 2024, the Fund produced a total return after fees and expenses of 14.38% (NAV). This compares to a total return for the Bloomberg US Aggregate Bond Index (the “Agg”) of 5.10% over the same period. The Agg is a broad-based index intended to capture the performance of the investment grade, US-dollar denominated, fixed rate taxable bond market. The Fund outperformance relative to the index was driven by several factors, including a general trend towards higher interest rates over the period, market volatility, interest income received on the Fund’s investments, and general trends in mortgage rates relative to risk-free rates. What Factors Influenced Performance The Fund principally holds mortgage-backed interest-only securities (“MBS IOs”). MBS IOs, receive the interest payments from a pool of mortgage loans, but do not receive any of the principal from those loans. As interest rates rise, the incentive for borrowers to prepay their mortgage tends to decrease. When prepayments decrease, the mortgage loans remain outstanding longer than they would otherwise. When this happens, the MBS IOs held by the Fund remain outstanding for longer, which tends to increase their value. Since interest rates generally trended higher during the period, the value of the Fund’s MBS IOs increased. Mortgage rates generally are set above risk-free rates, such as those on U.S. Treasury securities, and this difference (“spread”) varies over time. During the period, the spread on mortgage rates over risk-free rates generally increased, which further depressed prepayment speeds. During the period under discussion, interest rates had periods of sustained decline as well as periods of sustained increase. The Fund’s portfolio managers were able to construct a portfolio of MBS IOs that tended to increase in value when interest rates rose more than they declined in value when interest rates fell by a similar amount. This further contributed to the Fund’s outperformance as compared to the index. Finally, the Fund’s investments generated a significant amount of current income, much of which was paid out in the form of dividends on the Fund’s shares. For the 12 months ended July 31, 2024, each Fund share received cumulative dividends of $2.49 as compared to an average share price of $33.65 over the period. |
| Performance Past Does Not Indicate Future [Text] | The fund’s past performance is not a good predictor of how the fund will perform in the future. |
| Line Graph [Table Text Block] | Cumulative Performance As of Date FolioBeyond Alt Income and Interest Rate Hedge ETF (NAV) FolioBeyond Alt Income and Interest Rate Hedge ETF (MKT) Bloomberg US Aggregate Bond Index ICE U.S. Treasury 7-10 Year Bond 1X Inverse Index (USD) 09/30/2021 10000 10000 10000 10000 10/31/2021 9831 9877 9997 10028 11/30/2021 9849 10056 10027 9917 12/31/2021 9883 10024 10001 9947 01/31/2022 11223 11374 9786 10179 02/28/2022 11637 11695 9677 10214 03/31/2022 11992 12033 9408 10621 04/30/2022 12822 12962 9051 11070 05/31/2022 12962 12955 9109 10988 06/30/2022 13143 13125 8966 11066 07/31/2022 12214 12415 9185 10737 08/31/2022 12480 12472 8926 11148 09/30/2022 13006 12958 8540 11713 10/31/2022 13240 13233 8429 11874 11/30/2022 12774 12735 8739 11452 12/31/2022 13206 13230 8700 11570 01/31/2023 12859 12715 8968 11206 02/28/2023 13416 13490 8736 11571 03/31/2023 13385 13291 8958 11141 04/30/2023 13653 13579 9012 11040 05/31/2023 13881 13990 8914 11193 06/30/2023 13868 13979 8882 11331 07/31/2023 14150 14146 8876 11392 08/31/2023 14433 14473 8819 11470 09/30/23 14695 14711 8595 11835 10/31/23 15051 15157 8459 12057 11/30/23 14886 14847 8843 11530 12/31/23 14210 14162 9181 11093 01/31/24 14599 14751 9156 11088 02/29/24 15328 15314 9026 11314 03/31/24 15260 15202 9110 11230 04/30/24 16059 16011 8880 11578 05/31/24 16123 16130 9030 11370 06/30/24 16253 16204 9116 11222 07/31/24 16145 16172 9329 10904 |
| Average Annual Return [Table Text Block] | Annual Performance Annualized Returns for the Periods Ended July 31, 2024 1 Year Since Inception ( 9/30/2021 FolioBeyond Alternative Income and Interest Rate Hedge ETF (NAV) 14.38% 18.42% FolioBeyond Alternative Income and Interest Rate Hedge ETF (MKT) 14.32% 18.49% Bloomberg US Aggregate Bond Index 5.10% -2.42% ICE U.S. Treasury 7-10 Year Bond 1X Inverse Index -4.29% 3.10% |
| Performance Inception Date | Sep. 30, 2021 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 57,439,000 |
| Holdings Count | Holding | 57 |
| Advisory Fees Paid, Amount | $ 608,047 |
| Investment Company, Portfolio Turnover | 31% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024 ) Fund Size (Thousands) $57,439 Number of Holdings 57 Total Advisory Fee Paid $608,047 Annual Portfolio Turnover 31% |
| Holdings [Text Block] | What did the Fund invest in? (as of July 31, 2024 ) Sector Breakdown (% of net assets) Security % of Total Net Assets Mortgage-Backed Securities 0.901 Cash & Cash Equivalents 0.099 Percentages are based on total net assets. Cash & Cash Equivalents represents short-term investments and other assets in excess of liabilities. |
| Largest Holdings [Text Block] | Top Issuers (% of net assets) Government National Mortgage Association 46.9 Federal Home Loan Mortgage Corporation REMICS 31.1 Federal National Mortgage Association REMICS 11.2 Federal Home Loan Mortgage Corporation Strips 0.9 |
| Material Fund Change [Text Block] | How has the Fund changed? There were no material changes during the reporting period. |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with accountants. |
| Shareholder Report, Line Graph (Details) - USD ($) | Jul. 31, 2024 | Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Feb. 29, 2024 | Jan. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2023 | Oct. 31, 2023 | Sep. 30, 2023 | Aug. 31, 2023 | Jul. 31, 2023 | Jun. 30, 2023 | May 31, 2023 | Apr. 30, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Sep. 30, 2022 | Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2022 | May 31, 2022 | Apr. 30, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Jan. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2021 | Oct. 31, 2021 | Sep. 30, 2021 |
| FolioBeyond Alternative Income and Interest Rate Hedge ETF | |||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||
| Account Value | $ 16,145 | $ 16,253 | $ 16,123 | $ 16,059 | $ 15,260 | $ 15,328 | $ 14,599 | $ 14,210 | $ 14,886 | $ 15,051 | $ 14,695 | $ 14,433 | $ 14,150 | $ 13,868 | $ 13,881 | $ 13,653 | $ 13,385 | $ 13,416 | $ 12,859 | $ 13,206 | $ 12,774 | $ 13,240 | $ 13,006 | $ 12,480 | $ 12,214 | $ 13,143 | $ 12,962 | $ 12,822 | $ 11,992 | $ 11,637 | $ 11,223 | $ 9,883 | $ 9,849 | $ 9,831 | $ 10,000 |
| Bloomberg US Aggregate Bond Index | |||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||
| Account Value | 9,329 | 9,116 | 9,030 | 8,880 | 9,110 | 9,026 | 9,156 | 9,181 | 8,843 | 8,459 | 8,595 | 8,819 | 8,876 | 8,882 | 8,914 | 9,012 | 8,958 | 8,736 | 8,968 | 8,700 | 8,739 | 8,429 | 8,540 | 8,926 | 9,185 | 8,966 | 9,109 | 9,051 | 9,408 | 9,677 | 9,786 | 10,001 | 10,027 | 9,997 | 10,000 |
| ICE U.S. Treasury 7-10 Year Bond 1X Inverse Index | |||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||
| Account Value | 10,904 | 11,222 | 11,370 | 11,578 | 11,230 | 11,314 | 11,088 | 11,093 | 11,530 | 12,057 | 11,835 | 11,470 | 11,392 | 11,331 | 11,193 | 11,040 | 11,141 | 11,571 | 11,206 | 11,570 | 11,452 | 11,874 | 11,713 | 11,148 | 10,737 | 11,066 | 10,988 | 11,070 | 10,621 | 10,214 | 10,179 | 9,947 | 9,917 | 10,028 | 10,000 |
| FolioBeyond Alternative Income and Interest Rate Hedge ETF (MKT) | |||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||
| Account Value | $ 16,172 | $ 16,204 | $ 16,130 | $ 16,011 | $ 15,202 | $ 15,314 | $ 14,751 | $ 14,162 | $ 14,847 | $ 15,157 | $ 14,711 | $ 14,473 | $ 14,146 | $ 13,979 | $ 13,990 | $ 13,579 | $ 13,291 | $ 13,490 | $ 12,715 | $ 13,230 | $ 12,735 | $ 13,233 | $ 12,958 | $ 12,472 | $ 12,415 | $ 13,125 | $ 12,955 | $ 12,962 | $ 12,033 | $ 11,695 | $ 11,374 | $ 10,024 | $ 10,056 | $ 9,877 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 34 Months Ended |
| Jul. 31, 2024 | Jul. 31, 2024 | |
| FolioBeyond Alternative Income and Interest Rate Hedge ETF | ||
| Average Annual Return [Line Items] | ||
| Average Annual Return, Percent | 14.38% | 18.42% |
| Bloomberg US Aggregate Bond Index | ||
| Average Annual Return [Line Items] | ||
| Average Annual Return, Percent | 5.10% | (2.42%) |
| ICE U.S. Treasury 7-10 Year Bond 1X Inverse Index | ||
| Average Annual Return [Line Items] | ||
| Average Annual Return, Percent | (4.29%) | 3.10% |
| FolioBeyond Alternative Income and Interest Rate Hedge ETF (MKT) | ||
| Average Annual Return [Line Items] | ||
| Average Annual Return, Percent | 14.32% | 18.49% |
| Shareholder Report, Holdings (Details) - FolioBeyond Alternative Income and Interest Rate Hedge ETF | Jul. 31, 2024 |
| Government National Mortgage Association [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.90% |
| Federal Home Loan Mortgage Corporation REMICS [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.10% |
| Federal National Mortgage Association REMICS [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Federal Home Loan Mortgage Corporation Strips [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.10% |
| Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
