| Form N-CSR Cover | 12 Months Ended |
| Aug. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 31, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Tidal ETF Trust |
| Entity Central Index Key | 0001742912 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Aug. 31, 2024 |
| ATAC Credit Rotation ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | ATAC Credit Rotation ETF |
| Class Name | ATAC Credit Rotation ETF |
| Trading Symbol | JOJO |
| 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.atacfunds.com. You can also request this information by contacting us at (855) 282-2386 |
| Additional Information Phone Number | (855) 282-2386 |
| 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 ATAC Credit Rotation ETF $101 0.98% |
| Expenses Paid, Amount | $ 101 |
| Expense Ratio, Percent | 0.98% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? During the fiscal period, the Fund generated a total return of 6.01% (NAV). This compares to the 1.78% total return of the ATAC Credit-On/Credit-Off Index, the index whose credit-on/credit-off signals the Fund follows, and the 7.30% total return of the benchmark, the Bloomberg U.S. Aggregate Bond Index, for the same period. During the reporting period, global equity markets were significantly influenced by shifting expectations around inflation and interest rates, with stocks rallying on growing confidence that slowing inflation will allow for more rate cuts heading into the end of 2024. What Factors Influenced Performance? Greater exposure to U.S. High Yield Corporate bonds added to the performance of the Fund during the reporting period, while exposure to the 20+ Year U.S. Treasuries detracted from the portfolio's performance. Security Selection and Asset Allocation decisions led to positive impacts on the Fund's return for the year. |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good indicator of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Cumulative Performance (Initial Investment of $10,000) Date ATAC Credit Rotation ETF (NAV) ATAC Credit Rotation ETF (MKT) Bloomberg U.S. Aggregate Bond Index 7/15/21 10000 10000 10000 7/31/21 10067 10066 10037 8/31/21 10079 10074 10018 9/30/21 10065 10073 9931 10/31/21 10227 10221 9928 11/30/21 10141 10148 9958 12/31/21 9963 9965 9932 1/31/22 9636 9635 9718 2/28/22 9684 9681 9610 3/31/22 9072 9068 9343 4/30/22 8535 8526 8988 5/31/22 8387 8362 9046 6/30/22 7976 7976 8904 7/31/22 8346 8340 9122 8/31/22 8106 8098 8864 9/30/22 7491 7495 8481 10/31/22 7738 7753 8371 11/30/22 8238 8234 8679 12/31/22 7760 7776 8640 1/31/23 8229 8235 8906 2/28/23 8085 8078 8676 3/31/23 7925 7934 8896 4/30/23 8019 8035 8950 5/31/23 7913 7925 8853 6/30/23 8053 8067 8821 7/31/23 8000 8017 8815 8/31/23 8055 8061 8759 9/30/23 7581 7583 8536 10/31/23 7458 7492 8401 11/30/23 7989 7995 8782 12/31/23 8357 8367 9118 1/31/24 8146 8149 9093 2/29/24 8165 8169 8964 3/31/24 8126 8131 9047 4/30/24 7653 7656 8819 5/31/24 7849 7845 8968 6/30/24 7970 7983 9053 7/31/24 8247 8245 9264 8/31/24 8539 8539 9398 |
| Average Annual Return [Table Text Block] | Annual Performance Annualized Returns for the Periods Ended August 31, 2024 1 Year Since Inception ( 7/15/21 ATAC Credit Rotation ETF - NAV 6.01% -4.92% ATAC Credit Rotation ETF - Market 5.94% -4.92% Bloomberg U.S. Aggregate Bond Index 7.30% -1.97% |
| Performance Inception Date | Jul. 15, 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. |
| Updated Performance Information Location [Text Block] | Visit www.atacfunds.com for more recent performance information. |
| Net Assets | $ 2,997,000 |
| Holdings Count | Holdings | 3 |
| Advisory Fees Paid, Amount | $ 36,219 |
| Investment Company, Portfolio Turnover | 1,440% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of August 31, 2024 ) Fund Size (Thousands) $2,997 Number of Holdings 3 Net Advisory Fee Paid $36,219 Annual Portfolio Turnover 1,440 |
| Holdings [Text Block] | What did the Fund invest in? (as of August 31, 2024 ) Sector Breakdown (% of net assets) Sector % Exchange Traded Funds 0.998 Cash & Cash Equivalents 0.002 |
| Largest Holdings [Text Block] | Top Holdings (% of net assets) iShares iBoxx $ High Yield Corporate Bond ETF 69.9 Xtrackers USD High Yield Corporate Bond ETF 29.9 |
| 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. |
| ATAC US Rotation ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | ATAC US Rotation ETF |
| Class Name | ATAC US Rotation ETF |
| Trading Symbol | RORO |
| 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.atacfunds.com (855) 282-2386 |
| Additional Information Phone Number | (855) 282-2386 |
| Additional Information Website | www.atacfunds.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 ATAC US Rotation ETF $100 0.98% |
| Expenses Paid, Amount | $ 100 |
| Expense Ratio, Percent | 0.98% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? During the fiscal year ended August 31, 2024, the Fund generated a total return of 4.53% (NAV). This compares to the 5.79% total return of the ATAC Risk-On/Risk-Off Index, the index whose risk-on/risk-off signals the Fund follows, and the 27.14% total return of the benchmark, the S&P 500® Total Return Index, for the same period. During the reporting period, global equity markets were significantly influenced by shifting expectations around inflation and interest rates, with stocks rallying on growing confidence that slowing inflation will allow for more rate cuts heading into the end of 2024. What Factors Influenced Performance? Greater exposure to US Large Cap Growth equities added to the performance of the Fund during the reporting period, while exposure to the US Small cap equities detracted from the portfolio's performance. Security Selection and Asset Allocation decisions led to negative impacts on the Fund's return for the year. |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good indicator of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Cumulative Performance (Initial Investment of $10,000) Date ATAC US Rotation ETF (NAV) ATAC US Rotation ETF (MKT) S&P 500® Total Return Index Lipper Flexible Portfolio Fund Total Return Index 11/17/20 10000 10000 10000 10000 11/30/20 10194 10181 10040 10069 12/31/20 11025 11050 10426 10447 1/31/21 11410 11430 10321 10409 2/28/21 10680 10700 10606 10655 3/31/21 11134 11155 11070 10870 4/30/21 11782 11780 11661 11229 5/31/21 11376 11389 11742 11367 6/30/21 11857 11856 12017 11441 7/31/21 12281 12278 12302 11522 8/31/21 12255 12262 12676 11729 9/30/21 11415 11432 12087 11390 10/31/21 12388 12392 12933 11800 11/30/21 11735 11835 12844 11539 12/31/21 12055 12070 13419 11875 1/31/22 10236 10182 12725 11413 2/28/22 9966 9962 12344 11184 3/31/22 9107 9124 12802 11251 4/30/22 7867 7856 11686 10519 5/31/22 7421 7401 11707 10572 6/30/22 7315 7320 10741 9891 7/31/22 7794 7822 11731 10422 8/31/22 7269 7286 11253 10084 9/30/22 6601 6619 10216 9344 10/31/22 7016 7024 11044 9764 11/30/22 7257 7247 11661 10377 12/31/22 7082 7073 10989 10071 1/31/23 7916 7891 11679 10611 2/28/23 7921 7910 11394 10317 3/31/23 8868 8886 11813 10475 4/30/23 8765 8771 11997 10566 5/31/23 8194 8192 12049 10427 6/30/23 8862 8880 12845 10765 7/31/23 8988 8965 13258 11094 8/31/23 8833 8844 13047 10913 9/30/23 8050 8058 12425 10569 10/31/23 7750 7769 12164 10331 11/30/23 8689 8695 13275 10929 12/31/23 9426 9446 13878 11408 1/31/24 9043 9069 14111 11405 2/29/24 9785 9799 14864 11591 3/31/24 9768 9785 15343 11906 4/30/24 9078 9090 14716 11583 5/31/24 9362 9360 15446 11910 6/30/24 9284 9307 16000 12002 7/31/24 9567 9567 16195 12280 8/31/24 9234 9237 16587 12475 |
| Average Annual Return [Table Text Block] | Annual Performance Annualized Returns for the Periods Ended August 31, 2024 1 Year Since Inception ( 11/17/2020 ATAC US Rotation ETF - NAV 4.53% -2.08% ATAC US Rotation ETF - Market 4.45% -2.07% S&P 500® Total Return Index 27.14% 14.30% Lipper Flexible Portfolio Fund Total Return Index 14.32% 6.02% |
| Performance Inception Date | Nov. 17, 2020 |
| 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. |
| Updated Performance Information Location [Text Block] | Visit www.atacfunds.com for more recent performance information. |
| Net Assets | $ 7,277,000 |
| Holdings Count | Holdings | 3 |
| Advisory Fees Paid, Amount | $ 105,096 |
| Investment Company, Portfolio Turnover | 1,855% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of August 31, 2024 ) Fund Size (Thousands) $7,277 Number of Holdings 3 Net Advisory Fee Paid $105,096 Annual Portfolio Turnover 1,855 |
| Holdings [Text Block] | What did the Fund invest in? (as of August 31, 2024 ) Sector Breakdown (% of net assets) Sector % Exchange Traded Funds 1.0 Cash & Cash Equivalents 0.0 |
| Largest Holdings [Text Block] | Top Holdings (% of net assets) iShares 10-20 Year Treasury Bond ETF 65.1 PIMCO 25+ Year Zero Coupon U.S. Treasury Index ETF 34.9 |
| Material Fund Change [Text Block] | How has the Fund changed? There were no material changes during the reporting period. |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with accountants. |
| Shareholder Report, Line Graph (Details) - USD ($) | Aug. 31, 2024 | 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 | May 30, 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 | Aug. 31, 2021 | Jul. 31, 2021 | Jul. 15, 2021 | Jun. 30, 2021 | May 31, 2021 | Apr. 30, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2020 | Nov. 17, 2020 |
| ATAC Credit Rotation ETF | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 8,539 | $ 8,247 | $ 7,970 | $ 7,849 | $ 7,653 | $ 8,126 | $ 8,165 | $ 8,146 | $ 8,357 | $ 7,989 | $ 7,458 | $ 7,581 | $ 8,055 | $ 8,000 | $ 8,053 | $ 7,913 | $ 8,019 | $ 7,925 | $ 8,085 | $ 8,229 | $ 7,760 | $ 8,238 | $ 7,738 | $ 7,491 | $ 8,106 | $ 8,346 | $ 7,976 | $ 8,387 | $ 8,535 | $ 9,072 | $ 9,684 | $ 9,636 | $ 9,963 | $ 10,141 | $ 10,227 | $ 10,065 | $ 10,079 | $ 10,067 | $ 10,000 | ||||||||||
| ATAC US Rotation ETF | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 9,234 | 9,567 | 9,284 | 9,362 | 9,078 | 9,768 | 9,785 | 9,043 | 9,426 | 8,689 | 7,750 | 8,050 | 8,833 | 8,988 | 8,862 | 8,194 | 8,765 | 8,868 | 7,921 | 7,916 | 7,082 | 7,257 | 7,016 | 6,601 | 7,269 | 7,794 | 7,315 | $ 7,421 | 7,867 | 9,107 | 9,966 | 10,236 | 12,055 | 11,735 | 12,388 | 11,415 | 12,255 | 12,281 | $ 11,857 | $ 11,376 | $ 11,782 | $ 11,134 | $ 10,680 | $ 11,410 | $ 11,025 | $ 10,194 | $ 10,000 | ||
| Bloomberg U.S. Aggregate Bond Index | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 9,398 | 9,264 | 9,053 | 8,968 | 8,819 | 9,047 | 8,964 | 9,093 | 9,118 | 8,782 | 8,401 | 8,536 | 8,759 | 8,815 | 8,821 | 8,853 | 8,950 | 8,896 | 8,676 | 8,906 | 8,640 | 8,679 | 8,371 | 8,481 | 8,864 | 9,122 | 8,904 | 9,046 | 8,988 | 9,343 | 9,610 | 9,718 | 9,932 | 9,958 | 9,928 | 9,931 | 10,018 | 10,037 | 10,000 | ||||||||||
| S&P 500® Total Return Index | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 16,587 | 16,195 | 16,000 | 15,446 | 14,716 | 15,343 | 14,864 | 14,111 | 13,878 | 13,275 | 12,164 | 12,425 | 13,047 | 13,258 | 12,845 | 12,049 | 11,997 | 11,813 | 11,394 | 11,679 | 10,989 | 11,661 | 11,044 | 10,216 | 11,253 | 11,731 | 10,741 | 11,707 | 11,686 | 12,802 | 12,344 | 12,725 | 13,419 | 12,844 | 12,933 | 12,087 | 12,676 | 12,302 | 12,017 | 11,742 | 11,661 | 11,070 | 10,606 | 10,321 | 10,426 | 10,040 | 10,000 | ||
| Lipper Flexible Portfolio Fund Total Return Index [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 12,475 | 12,280 | 12,002 | 11,910 | 11,583 | 11,906 | 11,591 | 11,405 | 11,408 | 10,929 | 10,331 | 10,569 | 10,913 | 11,094 | 10,765 | 10,427 | 10,566 | 10,475 | 10,317 | 10,611 | 10,071 | 10,377 | 9,764 | 9,344 | 10,084 | 10,422 | 9,891 | 10,572 | 10,519 | 11,251 | 11,184 | 11,413 | 11,875 | 11,539 | 11,800 | 11,390 | 11,729 | 11,522 | 11,441 | 11,367 | 11,229 | 10,870 | 10,655 | 10,409 | 10,447 | 10,069 | 10,000 | ||
| ATAC Credit Rotation ETF (MKT) [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 8,539 | 8,245 | 7,983 | 7,845 | 7,656 | 8,131 | 8,169 | 8,149 | 8,367 | 7,995 | 7,492 | 7,583 | 8,061 | 8,017 | 8,067 | 7,925 | 8,035 | 7,934 | 8,078 | 8,235 | 7,776 | 8,234 | 7,753 | 7,495 | 8,098 | 8,340 | 7,976 | $ 8,362 | 8,526 | 9,068 | 9,681 | 9,635 | 9,965 | 10,148 | 10,221 | 10,073 | 10,074 | 10,066 | $ 10,000 | ||||||||||
| ATAC US Rotation ETF (MKT) [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 9,237 | $ 9,567 | $ 9,307 | $ 9,360 | $ 9,090 | $ 9,785 | $ 9,799 | $ 9,069 | $ 9,446 | $ 8,695 | $ 7,769 | $ 8,058 | $ 8,844 | $ 8,965 | $ 8,880 | $ 8,192 | $ 8,771 | $ 8,886 | $ 7,910 | $ 7,891 | $ 7,073 | $ 7,247 | $ 7,024 | $ 6,619 | $ 7,286 | $ 7,822 | $ 7,320 | $ 7,401 | $ 7,856 | $ 9,124 | $ 9,962 | $ 10,182 | $ 12,070 | $ 11,835 | $ 12,392 | $ 11,432 | $ 12,262 | $ 12,278 | $ 11,856 | $ 11,389 | $ 11,780 | $ 11,155 | $ 10,700 | $ 11,430 | $ 11,050 | $ 10,181 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 38 Months Ended | 45 Months Ended |
| Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | |
| ATAC Credit Rotation ETF | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 6.01% | (4.92%) | |
| ATAC US Rotation ETF | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 4.53% | (2.08%) | |
| Bloomberg U.S. Aggregate Bond Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 7.30% | (1.97%) | |
| S&P 500® Total Return Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 27.14% | 14.30% | |
| Lipper Flexible Portfolio Fund Total Return Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 14.32% | 6.02% | |
| ATAC Credit Rotation ETF (MKT) [Member] | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 5.94% | (4.92%) | |
| ATAC US Rotation ETF (MKT) [Member] | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 4.45% | (2.07%) |
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| ATAC Credit Rotation ETF | iShares iBoxx $ High Yield Corporate Bond ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 69.90% |
| ATAC Credit Rotation ETF | Xtrackers USD High Yield Corporate Bond ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.90% |
| ATAC Credit Rotation ETF | Exchange Traded Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.80% |
| ATAC Credit Rotation ETF | Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| ATAC US Rotation ETF | iShares 10-20 Year Treasury Bond ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.10% |
| ATAC US Rotation ETF | PIMCO 25+ Year Zero Coupon U.S. Treasury Index ETF [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.90% |
| ATAC US Rotation ETF | Exchange Traded Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
| ATAC US Rotation ETF | Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
