| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Northern Lights Fund Trust II |
| Entity Central Index Key | 0001518042 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Northern Lights Fund Trust II |
| Entity Central Index Key | 0001518042 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000122237 | |
| Shareholder Report [Line Items] | |
| Fund Name | Al Frank Fund |
| Class Name | Advisor Class |
| Trading Symbol | VALAX |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information Phone Number | 1-888-263-6443 |
| Additional Information Website | www.alfrankfunds.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 Class R $62 1.24% |
| Expenses Paid, Amount | $ 62 |
| Expense Ratio, Percent | 1.24% |
| 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] | Al Frank Fund S&P 500 ® Russell 3000 ® Russell 3000 ® Jun-2014 $10,000 $10,000 $10,000 $10,000 Jun-2015 $9,833 $10,742 $10,729 $10,386 Jun-2016 $9,318 $11,171 $10,959 $10,637 Jun-2017 $11,293 $13,170 $12,987 $12,361 Jun-2018 $12,550 $15,064 $14,907 $13,258 Jun-2019 $13,116 $16,633 $16,246 $14,231 Jun-2020 $12,395 $17,881 $17,306 $12,890 Jun-2021 $19,199 $25,175 $24,950 $18,742 Jun-2022 $16,597 $22,503 $21,490 $17,343 Jun-2023 $18,282 $26,912 $25,563 $19,289 Jun-2024 $21,542 $33,521 $31,475 $21,784 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 6 Months 1 Year 5 Years 10 Years Al Frank Fund 8.91% 17.83% 10.43% 7.98% S&P 500 ® 15.29% 24.56% 15.05% 12.86% Russell 3000 ® 13.56% 23.13% 14.14% 12.15% Russell 3000 ® 6.18% 12.93% 8.89% 8.10% 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. |
| 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 | Jun. 30, 2024 |
| AssetsNet | $ 68,970,918 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 258,163 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $68,970,918 Number of Portfolio Holdings 72 Advisory Fee (net of waivers) $258,163 Portfolio Turnover 2% |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Common Stocks 97.1% Money Market Funds 2.9% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the period ended June 30, 2024. |
| Updated Prospectus Web Address | www.alfrankfunds.com |
| Shareholder Report, Line Graph (Details) - USD ($) | 6 Months Ended | ||||||||||
| Jun. 30, 2014 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | |
| C000122237 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Al Frank Fund | ||||||||||
| Account Value | $ 10,000 | $ 21,542 | $ 18,282 | $ 16,597 | $ 19,199 | $ 12,395 | $ 13,116 | $ 12,550 | $ 11,293 | $ 9,318 | $ 9,833 |
| Russell 3000 Value Total Return | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Value Index" id="sjs-B9">Russell 3000<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> Value Index | ||||||||||
| Account Value | $ 10,000 | 21,784 | 19,289 | 17,343 | 18,742 | 12,890 | 14,231 | 13,258 | 12,361 | 10,637 | 10,386 |
| 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 | 33,521 | 26,912 | 22,503 | 25,175 | 17,881 | 16,633 | 15,064 | 13,170 | 11,171 | 10,742 |
| Russell 3000 Total Return | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Total Return Index" id="sjs-B17">Russell 3000<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> Total Return Index | ||||||||||
| Account Value | $ 10,000 | $ 31,475 | $ 25,563 | $ 21,490 | $ 24,950 | $ 17,306 | $ 16,246 | $ 14,907 | $ 12,987 | $ 10,959 | $ 10,729 |
| Shareholder Report, Average Annual Return (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended | |
| Jun. 30, 2024 | Jun. 30, 2014 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2024 | |
| C000122237 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | Al Frank Fund | ||||
| Without Sales Load [Member] | C000122237 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 8.91% | 17.83% | 10.43% | 7.98% | |
| Russell 3000 Value Total Return | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | ®</sup> Value Index" id="sjs-C11">Russell 3000<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> Value Index | ||||
| Average Annual Return, Percent | 6.18% | 12.93% | 8.89% | 8.10% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-C15">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 | 15.29% | 24.56% | 15.05% | 12.86% | |
| Russell 3000 Total Return | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | ®</sup> Total Return Index" id="sjs-C19">Russell 3000<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> Total Return Index | ||||
| Average Annual Return, Percent | 13.56% | 23.13% | 14.14% | 12.15% | |
| Shareholder Report, Holdings (Details) - C000122237 | Jun. 30, 2024 |
| Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Fidelity Government Portfolio | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| JPMorgan Chase & Company | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Microsoft Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Alphabet, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Lam Research Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| EOG Resources, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Capital One Financial Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Prudential Financial, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Seagate Technology Holdings PLC | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.80% |
| Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.20% |
| InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 97.10% |
| InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.90% |
