| Form N-CSR Cover | 12 Months Ended |
| Sep. 30, 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 | Sep. 30, 2024 |
| Shareholder Report | 12 Months Ended |
| Sep. 30, 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 | Sep. 30, 2024 |
| American Customer Satisfaction ETF | |
| Shareholder Report [Line Items] | |
| Fund Name | American Customer Satisfaction ETF |
| Class Name | American Customer Satisfaction ETF |
| Trading Symbol | ACSI |
| 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 https://www.acsietf.com/ (800) 617-0004 |
| Additional Information Phone Number | (800) 617-0004 |
| Additional Information Website | https://www.acsietf.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 American Customer Satisfaction ETF $ 76 0.65 |
| Expenses Paid, Amount | $ 76 |
| Expense Ratio, Percent | 0.65% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? The Fund returned 33.92% (NAV) for the fiscal year ended September 30, 2024 as compared to 36.35% for the S&P 500® Total Return Index (the “S&P 500®”). The Fund invests in US listed companies with industry leading customer satisfaction as measured by the American Customer Satisfaction Index (the “Index”). The markets were significantly influenced by the combination of persistent inflation alongside falling interest rates throughout 2024. What Factors Influenced Performance? The Fund's underweight exposure to the Technology Sector as compared to the S&P 500®, as well as active positioning within the sector, accounted for over 100% of the Fund's differential as compared to the S&P 500®. The AI/Microchip sub-sectors (which had incredibly strong performance) are not measured by the Index and therefore not available for investment by the Fund. Although our overweight position in the Consumer Discretionary and Consumer Staples sectors weighed on performance, our active positioning within those sectors made a robust positive contribution during the reporting period. Communication Services and Financials were industries where the Fund had a positive contribution from being BOTH overweight and active positioning within the sectors. Industrials and Healthcare were sectors where the Fund's active positioning had the most negative contribution. Top Contributors: • Apple • Costco • Amazon Top Detractors: • Humana • Avis • Papa John’s |
| 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 American Customer Satisfaction ETF (NAV) American Customer Satisfaction Investable Index S&P 500® Total Return Index 9/30/2016 10000 10000 10000 10/31/2016 10000 10000 10000 11/30/2016 10574 10575 10370 12/31/2016 10813 10819 10575 1/31/2017 10862 10892 10776 2/28/2017 11211 11248 11204 3/31/2017 11192 11235 11217 4/30/2017 11341 11401 11332 5/31/2017 11447 11514 11492 6/30/2017 11476 11544 11563 7/31/2017 11594 11679 11801 8/31/2017 11540 11631 11837 9/30/2017 11692 11792 12081 10/31/2017 11829 11939 12363 11/30/2017 12395 12518 12742 12/31/2017 12488 12620 12884 1/31/2018 13043 13187 13622 2/28/2018 12637 12783 13120 3/31/2018 12434 12583 12786 4/30/2018 12561 12720 12835 5/31/2018 12729 12895 13144 6/30/2018 12986 13164 13225 7/31/2018 13302 13499 13718 8/31/2018 13817 14030 14165 9/30/2018 13799 14016 14245 10/31/2018 13108 13325 13271 11/30/2018 13371 13603 13542 12/31/2018 11938 12145 12319 1/31/2019 12929 13160 13306 2/28/2019 13378 13625 13734 3/31/2019 13445 13701 14001 4/30/2019 13883 14158 14567 5/31/2019 13109 13376 13642 6/30/2019 13853 14145 14603 7/31/2019 14208 14517 14813 8/31/2019 13724 14033 14578 9/30/2019 14055 14381 14851 10/31/2019 14195 14533 15173 11/30/2019 14558 14912 15724 12/31/2019 14859 15231 16198 1/31/2020 14963 15349 16192 2/29/2020 13845 14206 14859 3/31/2020 11646 11953 13024 4/30/2020 13018 13369 14693 5/31/2020 13595 13963 15393 6/30/2020 14015 14400 15699 7/31/2020 15006 15427 16584 8/31/2020 16137 16604 17776 9/30/2020 15663 16124 17101 10/31/2020 15689 16161 16646 11/30/2020 17648 18191 18468 12/31/2020 18254 18826 19178 1/31/2021 18035 18609 18985 2/28/2021 18828 19437 19508 3/31/2021 19499 20142 20363 4/30/2021 20577 21270 21449 5/31/2021 20725 21436 21599 6/30/2021 21145 21881 22103 7/31/2021 21300 22054 22628 8/31/2021 21746 22529 23316 9/30/2021 20662 21415 22232 10/31/2021 21924 22738 23790 11/30/2021 21599 22411 23625 12/31/2021 22518 23379 24684 1/31/2022 21185 22005 23406 2/28/2022 20782 21596 22705 3/31/2022 21407 22259 23548 4/30/2022 19336 20112 21495 5/31/2022 19263 20048 21534 6/30/2022 17823 18556 19757 7/31/2022 19575 20399 21579 8/31/2022 19095 19909 20699 9/30/2022 17437 18187 18792 10/31/2022 18590 19391 20314 11/30/2022 19358 20205 21449 12/31/2022 17807 18593 20213 1/31/2023 19426 20298 21483 2/28/2023 18849 19702 20959 3/31/2023 18968 19836 21729 4/30/2023 18904 19783 22068 5/31/2023 18705 19585 22164 6/30/2023 20066 21025 23628 7/31/2023 20618 21618 24387 8/31/2023 19818 20788 23999 9/30/2023 18903 19836 22855 10/31/2023 18772 19709 22374 11/30/2023 20485 21525 24417 12/31/2023 21550 22660 25527 1/31/2024 21210 22315 25956 2/29/2024 21732 22876 27342 3/31/2024 22354 23545 28221 4/30/2024 21971 23151 27069 5/31/2024 23169 24431 28411 6/30/2024 23823 25138 29430 7/31/2024 24037 25381 29788 8/31/2024 24651 26045 30511 9/30/2024 25315 26761 31163 |
| Average Annual Return [Table Text Block] | Annual Performance Annualized Returns for the Periods Ended September 30, 2024 1 Year 5 year Since Inception ( 10/31/2016 American Customer Satisfaction ETF 33.92% 12.49% 12.45% American Customer Satisfaction Investable Index 34.91% 13.23% 13.24% S&P 500® Total Return Index 36.35% 15.98% 15.44% |
| Performance Inception Date | Oct. 31, 2016 |
| 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 | $ 90,994,000 |
| Holdings Count | Holdings | 34 |
| Advisory Fees Paid, Amount | $ 518,254 |
| Investment Company, Portfolio Turnover | 60% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of September 30, 2024 ) Fund Size (Thousands) $90,994 Number of Holdings 34 Total Advisory Fee Paid $518,254 Annual Portfolio Turnover 60% |
| Holdings [Text Block] | What did the Fund invest in? (as of September 30, 2024 ) Sector Breakdown (% of net assets) Sector % Consumer, Cyclical 0.311 Communications 0.269 Financial 0.131 Consumer, Non-cyclical 0.124 Technology 0.115 Utilities 0.029 Industrial 0.020 Cash & Cash Equivalents 0.001 Percentages are based on total net assets. Cash & Cash Equivalents represents short-term investments and liabilities in excess of other assets. |
| Largest Holdings [Text Block] | Top Ten Holdings (% of net assets) Apple Inc. 7.1 Costco Wholesale Corp. 6.9 Alphabet, Inc. - Class C 4.8 Amazon.com Inc 4.4 JPMorgan Chase & Co. 4.4 Microsoft Corp. 4.4 Keurig Dr Pepper, Inc. 4.2 UnitedHealth Group, Inc. 3.5 AT&T, Inc. 3.2 American International Group, Inc. 3.2 |
| Material Fund Change [Text Block] | How has the Fund changed? There were no material changes during the reporting period. |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with accountants. |
| Shareholder Report, Line Graph (Details) - USD ($) | Sep. 30, 2024 | 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 | 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 | Jun. 30, 2021 | May 31, 2021 | Apr. 30, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2020 | Oct. 31, 2020 | Sep. 30, 2020 | Aug. 31, 2020 | Jul. 31, 2020 | Jun. 30, 2020 | May 31, 2020 | Apr. 30, 2020 | Mar. 31, 2020 | Feb. 29, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2019 | Oct. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Jul. 31, 2019 | Jun. 30, 2019 | May 31, 2019 | Apr. 30, 2019 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Oct. 31, 2018 | Sep. 30, 2018 | Aug. 31, 2018 | Jul. 31, 2018 | Jun. 30, 2018 | May 31, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Nov. 30, 2017 | Oct. 31, 2017 | Sep. 30, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Jun. 30, 2017 | May 31, 2017 | Apr. 30, 2017 | Mar. 31, 2017 | Feb. 28, 2017 | Jan. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2016 | Oct. 31, 2016 | Sep. 30, 2016 |
| American Customer Satisfaction ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 25,315 | $ 24,651 | $ 24,037 | $ 23,823 | $ 23,169 | $ 21,971 | $ 22,354 | $ 21,732 | $ 21,210 | $ 21,550 | $ 20,485 | $ 18,772 | $ 18,903 | $ 19,818 | $ 20,618 | $ 20,066 | $ 18,705 | $ 18,904 | $ 18,968 | $ 18,849 | $ 19,426 | $ 17,807 | $ 19,358 | $ 18,590 | $ 17,437 | $ 19,095 | $ 19,575 | $ 17,823 | $ 19,263 | $ 19,336 | $ 21,407 | $ 20,782 | $ 21,185 | $ 22,518 | $ 21,599 | $ 21,924 | $ 20,662 | $ 21,746 | $ 21,300 | $ 21,145 | $ 20,725 | $ 20,577 | $ 19,499 | $ 18,828 | $ 18,035 | $ 18,254 | $ 17,648 | $ 15,689 | $ 15,663 | $ 16,137 | $ 15,006 | $ 14,015 | $ 13,595 | $ 13,018 | $ 11,646 | $ 13,845 | $ 14,963 | $ 14,859 | $ 14,558 | $ 14,195 | $ 14,055 | $ 13,724 | $ 14,208 | $ 13,853 | $ 13,109 | $ 13,883 | $ 13,445 | $ 13,378 | $ 12,929 | $ 11,938 | $ 13,371 | $ 13,108 | $ 13,799 | $ 13,817 | $ 13,302 | $ 12,986 | $ 12,729 | $ 12,561 | $ 12,434 | $ 12,637 | $ 13,043 | $ 12,488 | $ 12,395 | $ 11,829 | $ 11,692 | $ 11,540 | $ 11,594 | $ 11,476 | $ 11,447 | $ 11,341 | $ 11,192 | $ 11,211 | $ 10,862 | $ 10,813 | $ 10,574 | $ 10,000 | $ 10,000 |
| American Customer Satisfaction Investable Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 26,761 | 26,045 | 25,381 | 25,138 | 24,431 | 23,151 | 23,545 | 22,876 | 22,315 | 22,660 | 21,525 | 19,709 | 19,836 | 20,788 | 21,618 | 21,025 | 19,585 | 19,783 | 19,836 | 19,702 | 20,298 | 18,593 | 20,205 | 19,391 | 18,187 | 19,909 | 20,399 | 18,556 | 20,048 | 20,112 | 22,259 | 21,596 | 22,005 | 23,379 | 22,411 | 22,738 | 21,415 | 22,529 | 22,054 | 21,881 | 21,436 | 21,270 | 20,142 | 19,437 | 18,609 | 18,826 | 18,191 | 16,161 | 16,124 | 16,604 | 15,427 | 14,400 | 13,963 | 13,369 | 11,953 | 14,206 | 15,349 | 15,231 | 14,912 | 14,533 | 14,381 | 14,033 | 14,517 | 14,145 | 13,376 | 14,158 | 13,701 | 13,625 | 13,160 | 12,145 | 13,603 | 13,325 | 14,016 | 14,030 | 13,499 | 13,164 | 12,895 | 12,720 | 12,583 | 12,783 | 13,187 | 12,620 | 12,518 | 11,939 | 11,792 | 11,631 | 11,679 | 11,544 | 11,514 | 11,401 | 11,235 | 11,248 | 10,892 | 10,819 | 10,575 | 10,000 | 10,000 |
| S&P 500 Total Return Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 31,163 | $ 30,511 | $ 29,788 | $ 29,430 | $ 28,411 | $ 27,069 | $ 28,221 | $ 27,342 | $ 25,956 | $ 25,527 | $ 24,417 | $ 22,374 | $ 22,855 | $ 23,999 | $ 24,387 | $ 23,628 | $ 22,164 | $ 22,068 | $ 21,729 | $ 20,959 | $ 21,483 | $ 20,213 | $ 21,449 | $ 20,314 | $ 18,792 | $ 20,699 | $ 21,579 | $ 19,757 | $ 21,534 | $ 21,495 | $ 23,548 | $ 22,705 | $ 23,406 | $ 24,684 | $ 23,625 | $ 23,790 | $ 22,232 | $ 23,316 | $ 22,628 | $ 22,103 | $ 21,599 | $ 21,449 | $ 20,363 | $ 19,508 | $ 18,985 | $ 19,178 | $ 18,468 | $ 16,646 | $ 17,101 | $ 17,776 | $ 16,584 | $ 15,699 | $ 15,393 | $ 14,693 | $ 13,024 | $ 14,859 | $ 16,192 | $ 16,198 | $ 15,724 | $ 15,173 | $ 14,851 | $ 14,578 | $ 14,813 | $ 14,603 | $ 13,642 | $ 14,567 | $ 14,001 | $ 13,734 | $ 13,306 | $ 12,319 | $ 13,542 | $ 13,271 | $ 14,245 | $ 14,165 | $ 13,718 | $ 13,225 | $ 13,144 | $ 12,835 | $ 12,786 | $ 13,120 | $ 13,622 | $ 12,884 | $ 12,742 | $ 12,363 | $ 12,081 | $ 11,837 | $ 11,801 | $ 11,563 | $ 11,492 | $ 11,332 | $ 11,217 | $ 11,204 | $ 10,776 | $ 10,575 | $ 10,370 | $ 10,000 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 95 Months Ended |
| Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | |
| American Customer Satisfaction ETF | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 33.92% | 12.49% | 12.45% |
| American Customer Satisfaction Investable Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 34.91% | 13.23% | 13.24% |
| S&P 500 Total Return Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 15.44% |
| Shareholder Report, Holdings (Details) - American Customer Satisfaction ETF | Sep. 30, 2024 |
| Apple Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Costco Wholesale Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Alphabet, Inc. - Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Amazon.com Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Keurig Dr Pepper, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| UnitedHealth Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| AT&T, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| American International Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Consumer, Cyclical [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.10% |
| Communications [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.90% |
| Financial [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| Consumer, Non-cyclical [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.40% |
| Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Industrial [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Cash and Cash Equivalents [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
