| Form N-CSR Cover | 12 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Northern Lights Fund Trust III |
| Entity Central Index Key | 0001537140 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 6 Months Ended | 12 Months Ended |
| Sep. 30, 2024 USD ($) Holding | Sep. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | ||
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Northern Lights Fund Trust III | |
| Entity Central Index Key | 0001537140 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Sep. 30, 2024 | |
| C000133836 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | The Teberg Fund | |
| Class Name | No-Load Class | |
| Trading Symbol | TEBRX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about The Teberg Fund for the period of April 1, 2024 to September 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.abscapfunds.com | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-866-209-1964 | |
| Additional Information Website | www.abscapfunds.com | |
| 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 No-Load Class $91 1.75% Footnote Reference * Annualized | |
| Expenses Paid, Amount | $ 91 | |
| Expense Ratio, Percent | 1.75% | |
| 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. | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 6 Months 1 Year 5 Years 10 Years The Teberg Fund - No-Load Class 6.68% 38.69% 15.84% 10.10% S&P 500 ® 10.42% 36.35% 15.98% 13.38% Dow Jones Industrial Average 7.35% 28.85% 11.78% 12.03% 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. | |
| AssetsNet | $ 48,189,346 | $ 48,189,346 |
| Holdings Count | Holding | 17 | 17 |
| Advisory Fees Paid, Amount | $ 193,420 | |
| InvestmentCompanyPortfolioTurnover | 0% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $48,189,346 Number of Portfolio Holdings 17 Advisory Fee (net of waivers) $193,420 Portfolio Turnover 0% | |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Common Stocks 7.2% Exchange-Traded Funds 79.8% Money Market Funds 1.9% Open End Funds 1.8% U.S. Government & Agencies 9.3% | |
| Material Fund Change [Text Block] | Material Fund Changes Effective November 27, 2023 the fiscal year end of the Fund was moved to September 30. | |
| C000248905 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | The Teberg Fund | |
| Class Name | Investor Class | |
| Trading Symbol | ABSTX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about The Teberg Fund for the period of April 1, 2024 to September 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.abscapfunds.com | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-866-209-1964 | |
| Additional Information Website | www.abscapfunds.com | |
| 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 Investor Class $140 2.70% Footnote Reference * Annualized | |
| Expenses Paid, Amount | $ 140 | |
| Expense Ratio, Percent | 2.70% | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 6 Months 1 Year 5 Years 10 Years The Teberg Fund - Investor Class 6.29% 38.19% 15.76% 10.06% S&P 500 ® 10.42% 36.35% 15.98% 13.38% Dow Jones Industrial Average 7.35% 28.85% 11.78% 12.03% 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 a shareholder would pay on fund distributions or redemption of fund shares. | |
| AssetsNet | $ 48,189,346 | $ 48,189,346 |
| Holdings Count | Holding | 17 | 17 |
| Advisory Fees Paid, Amount | $ 193,420 | |
| InvestmentCompanyPortfolioTurnover | 0% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $48,189,346 Number of Portfolio Holdings 17 Advisory Fee (net of waivers) $193,420 Portfolio Turnover 0% | |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Common Stocks 7.2% Exchange-Traded Funds 79.8% Money Market Funds 1.9% Open End Funds 1.8% U.S. Government & Agencies 9.3% | |
| Material Fund Change [Text Block] | Material Fund Changes Effective November 27, 2023 the fiscal year end of the Fund was moved to September 30. |
| Shareholder Report, Line Graph (Details) - USD ($) | 6 Months Ended | ||||||||||
| Sep. 30, 2014 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | |
| C000133836 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Teberg Fund - No-Load Class | ||||||||||
| Account Value | $ 10,000 | $ 26,167 | $ 18,868 | $ 14,726 | $ 18,846 | $ 14,132 | $ 12,542 | $ 12,352 | $ 11,160 | $ 9,783 | $ 9,122 |
| C000248905 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Teberg Fund - Investor Class | ||||||||||
| Account Value | $ 10,000 | 26,072 | 18,868 | 14,726 | 18,846 | 14,132 | 12,542 | 12,352 | 11,160 | 9,783 | 9,122 |
| DJ Industrial Average - Total Return | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Dow Jones Industrial Average | ||||||||||
| Account Value | $ 10,000 | 31,143 | 24,171 | 20,281 | 23,419 | 18,863 | 17,845 | 17,124 | 14,180 | 11,303 | 9,789 |
| DJ Industrial Average - Total Return | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Dow Jones Industrial Average | ||||||||||
| Account Value | $ 10,000 | 31,143 | 24,171 | 20,281 | 23,419 | 18,863 | 17,845 | 17,124 | 14,180 | 11,303 | 9,789 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B21">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 | 35,098 | 25,741 | 21,165 | 25,040 | 19,260 | 16,727 | 16,044 | 13,607 | 11,472 | 9,939 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B25">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 | $ 35,098 | $ 25,741 | $ 21,165 | $ 25,040 | $ 19,260 | $ 16,727 | $ 16,044 | $ 13,607 | $ 11,472 | $ 9,939 |
| Shareholder Report, Average Annual Return (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended | |
| Sep. 30, 2024 | Sep. 30, 2014 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | |
| C000133836 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Teberg Fund - No-Load Class | ||||
| C000248905 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Teberg Fund - Investor Class | ||||
| Without Sales Load [Member] | C000133836 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.68% | 38.69% | 15.84% | 10.10% | |
| Without Sales Load [Member] | C000248905 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.29% | 38.19% | 15.76% | 10.06% | |
| DJ Industrial Average - Total Return | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | Dow Jones Industrial Average | ||||
| Average Annual Return, Percent | 7.35% | 28.85% | 11.78% | 12.03% | |
| DJ Industrial Average - Total Return | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | Dow Jones Industrial Average | ||||
| Average Annual Return, Percent | 7.35% | 28.85% | 11.78% | 12.03% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-C25">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 | 10.42% | 36.35% | 15.98% | 13.38% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-C29">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 | 10.42% | 36.35% | 15.98% | 13.38% | |
| Shareholder Report, Holdings (Details) | Sep. 30, 2024 |
| C000133836 | VanEck Semiconductor ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.10% |
| C000133836 | Invesco QQQ Trust Series 1 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.60% |
| C000133836 | iShares Semiconductor ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000133836 | SPDR S&P 500 ETF Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| C000133836 | SPDR Dow Jones Industrial Average ETF Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000133836 | Berkshire Hathaway, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000133836 | iShares Core S&P Small-Cap ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000133836 | United States Treasury Bill, 5.1700, 2024-10-01 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000133836 | United States Treasury Bill, 4.9800, 2024-10-24 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000133836 | iShares Russell 2000 ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000133836 | Fixed Income | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000133836 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000133836 | Insurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000133836 | U.S. Treasury Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| C000133836 | Equity | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 81.30% |
| C000133836 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000133836 | InvestmentType_Exchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 79.80% |
| C000133836 | InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000133836 | InvestmentType_Open End Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000133836 | InvestmentType_U.S. Government & Agencies | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000248905 | VanEck Semiconductor ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.10% |
| C000248905 | Invesco QQQ Trust Series 1 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.60% |
| C000248905 | iShares Semiconductor ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000248905 | SPDR S&P 500 ETF Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.60% |
| C000248905 | SPDR Dow Jones Industrial Average ETF Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000248905 | Berkshire Hathaway, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000248905 | iShares Core S&P Small-Cap ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000248905 | United States Treasury Bill, 5.1700, 2024-10-01 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000248905 | United States Treasury Bill, 4.9800, 2024-10-24 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000248905 | iShares Russell 2000 ETF | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000248905 | Fixed Income | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000248905 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000248905 | Insurance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000248905 | U.S. Treasury Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.30% |
| C000248905 | Equity | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 81.30% |
| C000248905 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000248905 | InvestmentType_Exchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 79.80% |
| C000248905 | InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000248905 | InvestmentType_Open End Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000248905 | InvestmentType_U.S. Government & Agencies | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
