Performance Management |
Mar. 30, 2026 |
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| Saturna Growth Fund | |||||||
| Prospectus [Line Items] | |||||||
| Bar Chart and Performance Table [Heading] | Performance | ||||||
| Performance Narrative [Text Block] | The following bar chart presents the calendar year total returns of the Fund’s Investor Shares before taxes. The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year. A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance data current to the most recent month-end and quarter-end are available on https://www.saturna.com/funds/performance. |
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| Performance Past Does Not Indicate Future [Text] | A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future. | ||||||
| Performance Information Illustrates Variability of Returns [Text] | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategies. | ||||||
| Bar Chart [Heading] | Annual Total Return | ||||||
| Bar Chart Closing [Text Block] |
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| Performance Table Heading | Average Annual Total Returns | ||||||
| Performance Table Narrative | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategies. |
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| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. | ||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | ||||||
| Performance Table Explanation after Tax Higher | In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. | ||||||
| Average Annual Return, Caption [Optional Text] | Periods ended December 31, 2025 | ||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. |
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| Performance Availability Website Address [Text] | https://www.saturna.com/funds/performance | ||||||
| Saturna Growth Fund | Investor Shares | |||||||
| Prospectus [Line Items] | |||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter | ||||||
| Highest Quarterly Return | 25.45% | ||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | ||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter | ||||||
| Lowest Quarterly Return | (17.73%) | ||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | ||||||
| Saturna International Fund | |||||||
| Prospectus [Line Items] | |||||||
| Bar Chart and Performance Table [Heading] | Performance | ||||||
| Performance Narrative [Text Block] | The following bar chart presents the calendar year total returns of the Fund’s Investor Shares before taxes. The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year. A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance data current to the most recent month-end and quarter-end are available on https://www.saturna.com/funds/performance. |
||||||
| Performance Past Does Not Indicate Future [Text] | A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future. | ||||||
| Performance Information Illustrates Variability of Returns [Text] | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index. | ||||||
| Bar Chart [Heading] | Annual Total Return | ||||||
| Bar Chart Closing [Text Block] |
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| Performance Table Heading | Average Annual Total Returns | ||||||
| Performance Table Narrative | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index. |
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| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. | ||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | ||||||
| Performance Table Explanation after Tax Higher | In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. | ||||||
| Average Annual Return, Caption [Optional Text] | Periods ended December 31, 2025 | ||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. |
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| Performance Availability Website Address [Text] | https://www.saturna.com/funds/performance | ||||||
| Saturna International Fund | Investor Shares | |||||||
| Prospectus [Line Items] | |||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter | ||||||
| Highest Quarterly Return | 18.46% | ||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | ||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter | ||||||
| Lowest Quarterly Return | (20.85%) | ||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | ||||||
| Saturna Core Fund | |||||||
| Prospectus [Line Items] | |||||||
| Bar Chart and Performance Table [Heading] | Performance | ||||||
| Performance Narrative [Text Block] | The following bar chart presents the calendar year total returns of the Fund before taxes. The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year. A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance data current to the most recent month-end and quarter-end are available on https://www.saturna.com/funds/performance. |
||||||
| Performance Past Does Not Indicate Future [Text] | A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future. | ||||||
| Performance Information Illustrates Variability of Returns [Text] | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategies. | ||||||
| Bar Chart [Heading] | Annual Total Return | ||||||
| Bar Chart Closing [Text Block] |
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| Performance Table Heading | Average Annual Total Returns | ||||||
| Performance Table Narrative | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and for the life of the Fund compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategies. |
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| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. | ||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | ||||||
| Performance Table Explanation after Tax Higher | In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. | ||||||
| Average Annual Return, Caption [Optional Text] | Periods ended December 31, 2025 | ||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. |
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| Performance Availability Website Address [Text] | https://www.saturna.com/funds/performance | ||||||
| Saturna Core Fund | Saturna Core Fund Shares | |||||||
| Prospectus [Line Items] | |||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter | ||||||
| Highest Quarterly Return | 11.65% | ||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | ||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter | ||||||
| Lowest Quarterly Return | (11.94%) | ||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | ||||||
| Saturna Global Sustainable Bond Fund | |||||||
| Prospectus [Line Items] | |||||||
| Bar Chart and Performance Table [Heading] | Performance | ||||||
| Performance Narrative [Text Block] | The following bar chart presents the calendar year total returns of the Fund before taxes. The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year. A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance data current to the most recent month-end and quarter-end are available on https://www.saturna.com/funds/performance. |
||||||
| Performance Past Does Not Indicate Future [Text] | A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future. | ||||||
| Bar Chart [Heading] | Annual Total Return | ||||||
| Bar Chart Closing [Text Block] |
|
||||||
| Performance Table Heading | Average Annual Total Returns | ||||||
| Performance Table Narrative | The table below presents the average annual returns for the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for 1, 5, and 10 years and the Life of the Fund compare to those of a broad-based securities market index. |
||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. | ||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | ||||||
| Performance Table Explanation after Tax Higher | In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. | ||||||
| Average Annual Return, Caption [Optional Text] | Periods ended December 31, 2025 | ||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income. |
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| Performance Availability Website Address [Text] | https://www.saturna.com/funds/performance | ||||||
| Saturna Global Sustainable Bond Fund | Saturna Global Sustainable Bond Fund Shares | |||||||
| Prospectus [Line Items] | |||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter | ||||||
| Highest Quarterly Return | 5.64% | ||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | ||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter | ||||||
| Lowest Quarterly Return | (4.42%) | ||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 |