| Shareholder Report | 12 Months Ended | 120 Months Ended |
| Nov. 30, 2024 USD ($) Holding | Nov. 30, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Northern Lights Fund Trust IV | |
| Entity Central Index Key | 0001644419 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Nov. 30, 2024 | |
| C000169568 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Moerus Worldwide Value Fund | |
| Class Name | Class N | |
| Trading Symbol | MOWNX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Moerus Worldwide Value Fund for the period of December 1, 2023 to November 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.moeruscap.com/regulatory-resources/. You can also request this information by contacting us at 1-844-663-7871. | |
| Additional Information Phone Number | 1-844-663-7871 | |
| Additional Information Website | www.moeruscap.com/regulatory-resources/ | |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class N $170 1.50% | |
| Expenses Paid, Amount | $ 170 | |
| Expense Ratio, Percent | 1.50% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform during the reporting period? The Moerus Worldwide Value Fund (“the Fund”) returned +26.88 (net of fees) for the Class N share class, during the twelve months ended November 30, 2024. By comparison, the MSCI All Country World ex USA Index (“MSCI ACWI ex USA”) returned +13.03% (net), while the MSCI All Country World Index (“MSCI ACWI”) returned +26.12% (net) over the same period. In relative terms, U.S. equities generally outperformed international (as evidenced by the MSCI ACWI outperforming the MSCI ACWI ex USA) and the MSCI ACWI Growth Index (+28.98%) outperformed the MSCI ACWI Value Index (+23.18%), driven by large-cap U.S. Technology stocks. Yet despite the above market factors and conditions, which are generally not
supportive of the relative performance of the Fund’s strategy, the Fund outperformed the MSCI ACWI and significantly outperformed the MSCI ACWI ex USA during the period. The Fund’s value-conscious, opportunistic, and flexible approach typically results in a portfolio of bottom-up investments that tends to have high active share and low overlap with broader market indices. During the twelve months ended November 30, 2024, the Fund’s strong absolute performance and meaningful relative outperformance was driven by significant individual contributors to performance that included (in order of magnitude): Argentine bank Grupo Financiero Galicia S.A.; online travel agency Despegar.com Corp.; financial services provider Jefferies Financial Group Inc.; Argentine bank Banco Macro S.A.; and residential brokerage company Douglas Elliman, Inc. On the negative side, the most significant detractors from the Fund’s absolute performance during the period included: engineering and consulting services provider John Wood Group PLC; grocery retailer Companhia Brasileira de Distribuição; beauty products retailer Natura & Co. Holding S.A.; Latin American McDonald’s franchisee Arcos Dorados Holdings, Inc.; and Indian bank IDFC First Bank Limited. | |
| 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] | Moerus Worldwide Value Fund - Class N MSCI ACWI ex USA Index MSCI ACWI Net May-2016 $10,000 $10,000 $10,000 Nov-2016 $10,600 $10,136 $10,367 Nov-2017 $12,913 $12,933 $12,921 Nov-2018 $11,132 $11,883 $12,795 Nov-2019 $11,521 $13,214 $14,545 Nov-2020 $10,206 $14,472 $16,727 Nov-2021 $12,032 $15,795 $19,951 Nov-2022 $13,631 $13,920 $17,633 Nov-2023 $15,879 $15,209 $19,751 Nov-2024 $20,148 $17,191 $24,909 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception (May 31, 2016) Moerus Worldwide Value Fund - Class N 26.88% 11.83% 8.59% MSCI ACWI ex USA Index 13.03% 5.40% 6.58% MSCI ACWI Net 26.12% 11.36% 11.33% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |
| Performance Inception Date | | May 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. | |
| Material Change Date | Nov. 30, 2024 | |
| AssetsNet | $ 87,027,057 | $ 87,027,057 |
| Holdings Count | Holding | 39 | 39 |
| Advisory Fees Paid, Amount | $ 501,359 | |
| InvestmentCompanyPortfolioTurnover | 46% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $87,027,057 Number of Portfolio Holdings 39 Advisory Fee (net of waivers) $501,359 Portfolio Turnover 46% | |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Other Assets in Excess of Liabilities 1.2% Money Market Funds 2.6% Consumer Staples 3.5% Communications 3.7% Industrials 3.7% Consumer Discretionary 3.9% Energy 8.5% Real Estate 16.5% Materials 17.8% Financials 38.6% | |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Holding Name % of Net Assets Jefferies Financial Group, Inc. 4.1% Douglas Elliman, Inc. 4.1% Grupo Financiero Galicia S.A. - ADR 4.0% Despegar.com Corporation 3.7% Dundee Corporation 3.6% Hong Kong Exchanges & Clearing Ltd. 3.5% Wheaton Precious Metals Corporation 3.3% Standard Chartered PLC 3.1% Enerflex Ltd. 2.9% ESR Group Ltd. 2.9% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended November 30, 2024. | |
| C000169569 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Moerus Worldwide Value Fund | |
| Class Name | Institutional Class | |
| Trading Symbol | MOWIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Moerus Worldwide Value Fund for the period of December 1, 2023 to November 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.moeruscap.com/regulatory-resources/. You can also request this information by contacting us at 1-844-663-7871. | |
| Additional Information Phone Number | 1-844-663-7871 | |
| Additional Information Website | www.moeruscap.com/regulatory-resources/ | |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Class $142 1.25% | |
| Expenses Paid, Amount | $ 142 | |
| Expense Ratio, Percent | 1.25% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform during the reporting period? The Moerus Worldwide Value Fund (“the Fund”) returned +27.13% (net of fees) for the Institutional Class during the twelve months ended November 30, 2024. By comparison, the MSCI All Country World ex USA Index (“MSCI ACWI ex USA”) returned +13.03% (net), while the MSCI All Country World Index (“MSCI ACWI”) returned +26.12% (net) over the same period. In relative terms, U.S. equities generally outperformed international (as evidenced by the MSCI ACWI outperforming the MSCI ACWI ex USA) and the MSCI ACWI Growth Index (+28.98%) outperformed the MSCI ACWI Value Index (+23.18%), driven by large-cap U.S. Technology stocks. Yet despite the above market factors and conditions, which are generally not supportive of the relative performance of the Fund’s strategy, the Fund outperformed the MSCI ACWI and significantly outperformed the MSCI ACWI ex USA during the period. The Fund’s value-conscious, opportunistic, and flexible approach typically results in a portfolio of bottom-up investments that tends to have high active share and low overlap with broader market indices. During the twelve months ended November 30, 2024, the Fund’s strong absolute performance and meaningful relative outperformance was driven by significant individual contributors to performance that included (in order of magnitude): Argentine bank Grupo Financiero Galicia S.A.; online travel agency Despegar.com Corp.; financial services provider Jefferies Financial Group Inc.; Argentine bank Banco Macro S.A.; and residential brokerage company Douglas Elliman, Inc. On the negative side, the most significant detractors from the Fund’s absolute performance during the period included: engineering and consulting services provider John Wood Group PLC; grocery retailer Companhia Brasileira de Distribuição; beauty products retailer Natura & Co. Holding S.A.; Latin American McDonald’s franchisee Arcos Dorados Holdings, Inc.; and Indian bank IDFC First Bank Limited. | |
| 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] | Moerus Worldwide Value Fund - Institutional Class MSCI ACWI ex USA Index MSCI ACWI Net 05/31/16 $100,000 $100,000 $100,000 11/30/16 $106,100 $101,365 $103,669 11/30/17 $129,617 $129,331 $129,211 11/30/18 $112,054 $118,834 $127,947 11/30/19 $116,173 $132,138 $145,445 11/30/20 $103,200 $144,721 $167,275 11/30/21 $121,971 $157,948 $199,509 11/30/22 $138,561 $139,197 $176,325 11/30/23 $161,821 $152,088 $197,509 11/30/24 $205,715 $171,912 $249,093 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception (May 31, 2016) Moerus Worldwide Value Fund - Institutional Class 27.13% 12.11% 8.86% MSCI ACWI ex USA Index 13.03% 5.40% 6.58% MSCI ACWI Net 26.12% 11.36% 11.33% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. | |
| Performance Inception Date | | May 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. | |
| Material Change Date | Nov. 30, 2024 | |
| AssetsNet | $ 87,027,057 | $ 87,027,057 |
| Holdings Count | Holding | 39 | 39 |
| Advisory Fees Paid, Amount | $ 501,359 | |
| InvestmentCompanyPortfolioTurnover | 46% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $87,027,057 Number of Portfolio Holdings 39 Advisory Fee (net of waivers) $501,359 Portfolio Turnover 46% | |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Other Assets in Excess of Liabilities 1.2% Money Market Funds 2.6% Consumer Staples 3.5% Communications 3.7% Industrials 3.7% Consumer Discretionary 3.9% Energy 8.5% Real Estate 16.5% Materials 17.8% Financials 38.6% | |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Holding Name % of Net Assets Jefferies Financial Group, Inc. 4.1% Douglas Elliman, Inc. 4.1% Grupo Financiero Galicia S.A. - ADR 4.0% Despegar.com Corporation 3.7% Dundee Corporation 3.6% Hong Kong Exchanges & Clearing Ltd. 3.5% Wheaton Precious Metals Corporation 3.3% Standard Chartered PLC 3.1% Enerflex Ltd. 2.9% ESR Group Ltd. 2.9% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended November 30, 2024. | |
