| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| 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 |
| Shareholder Report | 6 Months Ended | 120 Months Ended |
| Nov. 30, 2024 USD ($) Holding | Nov. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| 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 | |
| C000172959 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | LGM Risk Managed Total Return Fund | |
| Trading Symbol | LBETX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about LGM Risk Managed Total Return Fund for the period of June 1, 2024 to November 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at www.LGMCapitalmanagement.com | |
| Additional Information Phone Number | 1-844-655-9371 | |
| Additional Information Website | www.LGMCapitalmanagement.com | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (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 $283 2.73% | |
| Expenses Paid, Amount | $ 283 | |
| Expense Ratio, Percent | 2.73% | |
| 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] | LGM Risk Managed Total Return Fund - Institutional Class Bloomberg Global Aggregate Index S&P 500 ® Jun-2017 $10,000 $10,000 $10,000 Nov-2017 $10,470 $10,236 $11,003 Nov-2018 $11,425 $9,947 $11,693 Nov-2019 $11,813 $10,779 $13,577 Nov-2020 $10,662 $11,682 $15,947 Nov-2021 $11,068 $11,297 $20,400 Nov-2022 $11,163 $9,398 $18,521 Nov-2023 $11,792 $9,590 $21,084 Nov-2024 $13,655 $10,035 $28,230 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception (June 12, 2017) LGM Risk Managed Total Return Fund - Institutional Class 15.79% 2.94% 4.26% Bloomberg Global Aggregate Index 4.64% - 0.05% S&P 500 ® 33.89% 15.77% 14.91% 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 | Jun. 12, 2017 | |
| 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 | $ 15,751,193 | $ 15,751,193 |
| Holdings Count | Holding | 4 | 4 |
| Advisory Fees Paid, Amount | $ 70,775 | |
| InvestmentCompanyPortfolioTurnover | 73% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $15,751,193 Number of Portfolio Holdings 4 Advisory Fee $70,775 Portfolio Turnover 73% | |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Exchange-Traded Funds 44.7% Money Market Funds 55.3% | |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the period ended November 30, 2024. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||
| Jun. 12, 2017 | Nov. 30, 2024 | Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017 | |
| C000172959 | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | LGM Risk Managed Total Return Fund - Institutional Class | ||||||||
| Account Value | $ 10,000 | $ 13,655 | $ 11,792 | $ 11,163 | $ 11,068 | $ 10,662 | $ 11,813 | $ 11,425 | $ 10,470 |
| Bloomberg Global Aggregate Index | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | Bloomberg Global Aggregate Index | ||||||||
| Account Value | $ 10,000 | 10,035 | 9,590 | 9,398 | 11,297 | 11,682 | 10,779 | 9,947 | 10,236 |
| S&P 500® Index | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B13">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | ||||||||
| Account Value | $ 10,000 | $ 28,230 | $ 21,084 | $ 18,521 | $ 20,400 | $ 15,947 | $ 13,577 | $ 11,693 | $ 11,003 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 90 Months Ended | |
| Jun. 12, 2017 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | |
| C000172959 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | LGM Risk Managed Total Return Fund - Institutional Class | |||
| Without Sales Load [Member] | C000172959 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 15.79% | 2.94% | 4.26% | |
| Bloomberg Global Aggregate Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Bloomberg Global Aggregate Index | |||
| Average Annual Return, Percent | 4.64% | (1.42%) | 0.05% | |
| S&P 500® Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B15">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | |||
| Average Annual Return, Percent | 33.89% | 15.77% | 14.91% |
| Shareholder Report, Holdings (Details) - C000172959 | Nov. 30, 2024 |
| 61747C582 | Morgan Stanley Institutional Liquidity - Treasury Portfolio, Institutional Class | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.50% |
| 78462F103 | SPDR S&P 500 ETF Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.30% |
| 921937835 | Vanguard Total Bond Market ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| 81369Y803 | Technology Select Sector SPDR Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fixed Income | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Equity | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.80% |
| Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 55.50% |
| InvestmentType_Exchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 44.70% |
| InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 55.30% |
