| 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 |
| Academy Veteran Impact ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | Academy Veteran Impact ETF |
| Class Name | Academy Veteran Impact ETF |
| Trading Symbol | VETZ |
| Annual or Semi-Annual Statement [Text Block] | annual Shareholder Report July 31, 2024 |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | This annual shareholder report www.academyetfs.com 631-0504 |
| Additional Information Phone Number | 631-0504 |
| Additional Information Website | www.academyetfs.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 Academy Veteran Impact ETF $35 0.35% |
| Expenses Paid, Amount | $ 35 |
| Expense Ratio, Percent | 0.35% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The Fund is an actively managed, high-quality mortgage-backed securities (MBS) and asset-backed securities (ABS) exchange-traded fund designed to provide broad portfolio diversification with minimal corporate credit risk. By leveraging loan-level analysis and quantitative modeling, the Fund seeks to outperform the Bloomberg U.S. MBS Index by identifying and investing in undervalued assets with favorable borrower behavior. For the fiscal year ended August 1, 2023 to July 31, 2024, the Fund returned 5.53% (NAV) and 5.90% (Market Price) net of fees since inception, outperforming the Bloomberg U.S. Mortgage-Backed Securities Index, which posted a return of 5.59%. During the same period, the Bloomberg U.S. Aggregate Index returned 5.70%. Portfolio Management Commentary Several factors influenced the performance of U.S. agency MBS over the past year. Interest rate volatility throughout the year, fueled by uncertainty surrounding the Federal Reserve's rate hike trajectory, weighed on MBS valuations by increasing the value of borrowers’ prepayment options, thereby diminishing bond values. Throughout the year, the Federal Reserve held its policy rate steady at 5.50%, while the yield on 10-year U.S. Treasuries saw a modest increase from 3.96% to 4.03%. This rise in yields further negatively impacted MBS price returns Option Adjusted Spreads (OAS) on the Bloomberg U.S. Mortgage-Backed Securities Index narrowed by 4 basis points (bps) to 44bps, as market participants navigated the outlook for interest rates. Additionally, spreads on Small Business loan asset-backed securities tightened by 25bps due to heightened demand. Tighter spreads in MBS and ABS had a positive impact on price returns. Mortgage rates eased slightly, with the national average for a 30-year fixed-rate mortgage dropping from 7.26% to 7.04%, after peaking at 8.10%, a level not seen since 2000. Mortgage refinancing remained subdued for most of the year due to the high rate environment but has recently begun to pick up. Housing activity fell to levels not seen since the Global Financial Crisis. Despite this, limited housing supply continued to drive national home prices higher, with the S&P CoreLogic Case-Shiller U.S. National Home Price Index rising 5.9% year over year. What Factors Influenced Performance The Academy Veteran Impact ETF is an actively managed, high-quality MBS and ABS fund designed to provide broad portfolio diversification with minimal corporate credit risk. By leveraging loan-level analysis and quantitative modeling, the Fund seeks to outperform the Bloomberg U.S. MBS Index by identifying and investing in undervalued assets with favorable borrower behavior. Active security selection within the agency MBS and ABS markets contributed positively to the Fund's relative performance. Lower coupon bonds, which are more sensitive to interest rate fluctuations, generally fared better during the period. Positioning Top Contributors to Performance GNMA II #MA8095 1.500% 12/20/43 GNMA II #CT6282 4.500% 2/20/62 GNMA II #CR2134 3.500% 9/20/60 GNMA II #CR2585 4.000% 8/20/50 GNMA II #MA8783 2.500% 3/20/52 GNMA II #CU5352 5.500% 8/20/53 GNMA II #CV6664 5.500% 6/20/53 GNMA II #CU4415 6.500% 5/20/53 GNMA II #MA9093 5.000% 8/20/53 GNMA II #BS8626 3.000% 2/20/50 Top Detractors to Performance GNMA II #MA8712 4.000% 3/20/53 GNMA II #786464 2.500% 12/20/52 GNMA II #CQ2299 3.000% 11/20/52 SBA GTD LN 530574 5.800% 2/25/34 GNMA II #786724 2.500% 1/20/53 GNMA II #MA9593 6.000% 4/20/54 GNMA II #CN5150 2.500% 7/20/52 SBA GTD LN 530560 5.800% 5/25/34 GNMA II #787240 5.000% 1/20/54 SBA GTD LN 530455 2.050% 11/25/33 |
| 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 Academy Veteran Impact ETF (NAV) Academy Veteran Impact ETF (MKT) Bloomberg U.S. Mortgage-Backed Securities Index Bloomberg U.S. Aggregate Bond Index 8/1/23 10000 10000 10000 10000 8/31/23 10007 10065 9984 9992 9/30/23 9761 9796 9666 9739 10/31/23 9570 9605 9466 9585 11/30/23 10036 10060 9960 10019 12/31/23 10389 10398 10389 10402 1/31/24 10372 10389 10341 10374 2/29/24 10205 10236 10173 10227 3/31/24 10324 10334 10280 10322 4/30/24 10067 10100 9969 10061 5/31/24 10226 10267 10169 10232 6/30/24 10358 10413 10287 10328 7/31/24 10553 10590 10559 10570 |
| Average Annual Return [Table Text Block] | Annual Performance Annualized Returns for the Period Ended July 31, 2024. Since Inception ( 8/1/2023 Academy Veteran Impact ETF (Market Price) 5.90% Academy Veteran Impact ETF (NAV) 5.53% Bloomberg U.S. MBS Index 5.59% Bloomberg U.S. Aggregate Index 5.70% |
| Performance Inception Date | Aug. 01, 2023 |
| 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 | $ 73,665,000 |
| Holdings Count | Holding | 90 |
| Advisory Fees Paid, Amount | $ 165,040 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of July 31, 2024 ) Fund Size (Thousands) $73,665 Number of Holdings 90 Total Advisory Fee Paid $165,040 Annual Portfolio Turnover 13% |
| Holdings [Text Block] | What did the Fund invest in? (as of July 31, 2024 ) Sector Breakdown (% of net assets) Security % of Total Net Assets Mortgage-Backed Securities 0.988 Cash & Cash Equivalents 0.012 Percentages are based on total net assets. Cash & Cash Equivalents represents short-term investments and other assets in excess of liabilities. |
| Largest Holdings [Text Block] | Top Issuers (% of net assets) Ginnie Mae II Pool 89.7 United States Small Business Administration 4.2 Small Business Administration Pools 3.7 Ginnie Mae I Pool 1.1 |
| Material Fund Change [Text Block] | How has the Fund changed? There were no material changes during the reporting period. |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with accountants. |
| Shareholder Report, Line Graph (Details) - USD ($) | 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 | Aug. 01, 2023 |
| Academy Veteran Impact ETF | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Account Value | $ 10,553 | $ 10,358 | $ 10,226 | $ 10,067 | $ 10,324 | $ 10,205 | $ 10,372 | $ 10,389 | $ 10,036 | $ 9,570 | $ 9,761 | $ 10,007 | $ 10,000 |
| Bloomberg U.S. Mortgage-Backed Securities Index | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Account Value | 10,559 | 10,287 | 10,169 | 9,969 | 10,280 | 10,173 | 10,341 | 10,389 | 9,960 | 9,466 | 9,666 | 9,984 | 10,000 |
| Bloomberg U.S. Aggregate Bond Index | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Account Value | 10,570 | 10,328 | 10,232 | 10,061 | 10,322 | 10,227 | 10,374 | 10,402 | 10,019 | 9,585 | 9,739 | 9,992 | 10,000 |
| Academy Veteran Impact ETF (MKT) | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Account Value | $ 10,590 | $ 10,413 | $ 10,267 | $ 10,100 | $ 10,334 | $ 10,236 | $ 10,389 | $ 10,398 | $ 10,060 | $ 9,605 | $ 9,796 | $ 10,065 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended |
| Jul. 31, 2024 | |
| Academy Veteran Impact ETF | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 5.90% |
| Bloomberg U.S. Mortgage-Backed Securities Index | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 5.59% |
| Bloomberg U.S. Aggregate Bond Index | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 5.70% |
| Academy Veteran Impact ETF (MKT) | |
| Average Annual Return [Line Items] | |
| Average Annual Return, Percent | 5.53% |
| Shareholder Report, Holdings (Details) - Academy Veteran Impact ETF | Jul. 31, 2024 |
| Ginnie Mae II Pool | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.70% |
| United States Small Business Administration | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Small Business Administration Pools | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| Ginnie Mae I Pool | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.80% |
| Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
