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Frontier MFG Global Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Summary Section
Objective [Heading] rr_ObjectiveHeading Investment Objective.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The investment objective of the Frontier MFG Global Equity Fund (the “Fund”) is capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund.
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Oct. 31, 2025
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During its most recent fiscal year, the Fund’s portfolio turnover rate was 39% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 39.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Service Class shares had not commenced operations as of June 30, 2023. Accordingly, “Additional Other Expenses” for the Service Class shares are estimated based on other expenses of the Institutional Class shares of the Fund for the fiscal year ended June 30, 2023.
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same.

Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategy.
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests at least 80% of its net assets in a non-diversified portfolio of publicly-traded equity securities issued by U.S. and non-U.S. companies. Equity securities in which the Fund will invest as a principal investment strategy consist of common stocks, American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and Real Estate Investment Trusts (“REITs”). Under normal market conditions, the Fund will allocate its assets among issuers located in at least three different countries and will invest at least 40% of its net assets in non-U.S. companies. The Fund’s subadviser, Magellan Asset Management Limited doing business as MFG Asset Management (“MFG Asset Management”), may reduce the 40% minimum investment amount to 30% if it deems market conditions to be unfavorable. In selecting securities for the Fund, MFG Asset Management seeks to identify high-quality companies at attractive prices while integrating an in-depth macroeconomic understanding in order to manage risk. With respect to its non-U.S. investments, the Fund invests in companies located in developed countries but may also invest in emerging markets as part of its principal investment strategy. The Fund may invest in ADRs, GDRs or the common stock of companies headquartered in China including investments in A-share listings on Chinese stock exchanges. The Fund will generally hold between 20 to 40 companies, typically with a market capitalization in excess of U.S. $10 billion at the time of purchase. The Fund will typically hold up to 20% of its total assets in cash and cash equivalents. The Fund may have significant investments in the technology sector.
Risk [Heading] rr_RiskHeading Principal Investment Risks.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance.
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The return information provided in the following bar chart and table illustrates how the performance of the Fund can vary from year to year, which is one indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year, while the table compares the Fund’s average annual total returns to a broad measure of market performance. Please keep in mind that the Fund’s past performance (before and after taxes) does not necessarily represent how it will perform in the future. Updated performance data is available on the Company’s website at www.frontiermutualfunds.com or by calling toll-free to 1-888-825-2100.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The return information provided in the following bar chart and table illustrates how the performance of the Fund can vary from year to year, which is one indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-888-825-2100
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.frontiermutualfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Please keep in mind that the Fund’s past performance (before and after taxes) does not necessarily represent how it will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns for Institutional Class Shares
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

The Fund’s return from January 1, 2023, through September 30, 2023, was 8.56%.

 

Best and Worst Quarterly Performance (during the periods shown above)

 

Best Quarter Return Worst Quarter Return
   
15.00% (2nd quarter, 2020) (14.00)% (1st quarter, 2020)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s return from January 1, 2023, through September 30, 2023, was
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2023
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 8.56%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 15.00%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.00%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns(1) (For the periods ended December 31, 2022)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns for the Fund were calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred or other tax-advantaged arrangements, such as a 401(k) plan or individual retirement account (“IRA”).
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Institutional Class shares, and the after-tax returns for Service Class shares will vary.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Fund Shares” may be higher than other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are shown only for Institutional Class shares, and the after-tax returns for Service Class shares will vary. After-tax returns for the Fund were calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred or other tax-advantaged arrangements, such as a 401(k) plan or individual retirement account (“IRA”). In certain cases, the figure representing “Return After Taxes on Distributions and Sale of Fund Shares” may be higher than other return figures for the same period. A higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
Frontier MFG Global Equity Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money.
Frontier MFG Global Equity Fund | Market Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market Risks; Recent Market Events. The Fund’s investments are subject to market risk, which may cause the value of the Fund’s investments to decline. If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money. U.S. and international markets have experienced volatility in recent months and years due to a number of economic, political and global macro factors, including rising inflation, trade tensions, the war between Russia and Ukraine, disruption in the banking sector and the impact of the coronavirus (COVID-19) global pandemic. Uncertainties regarding the level of central banks’ interest rate increases, political events, rising government debt in the U.S. and the possibility of a national or global recession have also contributed to market volatility. During periods of volatility, the Fund may experience high levels of shareholder redemptions and may have to sell securities at times when the Fund would otherwise not do so, potentially at unfavorable prices. Certain securities may be difficult to value during such periods.
Frontier MFG Global Equity Fund | Common Stocks Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Common Stocks Risks. Common stocks held by the Fund will fluctuate in value based on the earnings of the company and on general industry and market conditions, leading to fluctuations in the Fund’s share price.
Frontier MFG Global Equity Fund | Stock Selection Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Stock Selection Risks. The stocks selected for the Fund may decline in value or not increase in value when the stock market in general is rising.
Frontier MFG Global Equity Fund | REIT Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock REIT Risks. A REIT’s share price may decline because of adverse developments affecting the underlying industry, including changes to interest rates. The returns of REITs may trail returns of the overall market. The Fund’s investments in REITs may be subject to special tax rules, or a particular REIT may fail to qualify for the favorable federal income tax treatment applicable to REITs, the effect of which may have adverse tax consequences for the Fund and shareholders. The Fund will indirectly bear its proportionate share of expenses incurred by REITs in which the Fund invests in addition to the expenses incurred directly by the Fund.
Frontier MFG Global Equity Fund | Foreign Securities Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Foreign Securities Risks. Investments in securities of foreign companies involve additional risks, including less liquidity, currency-rate fluctuations, political and economic instability, differences in financial reporting standards and securities market regulation, and the imposition of foreign withholding taxes.
Frontier MFG Global Equity Fund | Emerging Markets Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Emerging Markets Risks. Emerging market countries may have relatively unstable governments, weaker economies and less developed legal systems with fewer securities holder rights. Emerging market economies may be based on only a few industries and security issuers may be more susceptible to economic weakness and more likely to default. Emerging market securities also tend to be less liquid.
Frontier MFG Global Equity Fund | China Investing Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock ● China Investing Risks. The Fund may invest in companies headquartered in China, including Hong Kong. Risks associated with investments in China include risks related to governmental policies and risks to the economy from trade or political disputes with China’s trading partners.
Frontier MFG Global Equity Fund | Currency Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Currency Risks. The value of the Fund’s foreign holdings as measured in U.S. dollars may be affected unfavorably by changes in foreign currency exchange rates. The Fund may also incur costs in connection with conversions between various currencies.
Frontier MFG Global Equity Fund | Risk Nondiversified Status [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Non-Diversification Risks. The Fund is non-diversified, which means it may invest more of its assets in a smaller number of companies than funds that are diversified. Gains or losses on a single stock may have greater impact on the Fund than for other funds that invest in a greater number of companies.
Frontier MFG Global Equity Fund | Large Capitalization Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Large Capitalization Risks. Larger, more established companies may be unable to respond quickly to new competitive challenges, such as changes in consumer tastes or innovative, smaller competitors. Large-capitalization companies are also sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion.
Frontier MFG Global Equity Fund | ADR/GDR Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock ADR/GDR Risks. The risks of ADRs and GDRs include many of the risks associated with investing directly in foreign securities, such as currency rate fluctuations and political and economic instability.
Frontier MFG Global Equity Fund | Management Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Management Risks. The Fund is subject to management risk as an actively-managed investment portfolio and is dependent on the decisions of the portfolio management team to achieve the Fund’s investment objective.
Frontier MFG Global Equity Fund | Small Fund Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Small Fund Risks. There can be no assurance that the Fund will grow to or maintain an economically viable size.
Frontier MFG Global Equity Fund | Liquidity Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Liquidity Risks. Liquidity risk is the risk that certain securities may be difficult or impossible to sell, or sell at the time and price desired by MFG Asset Management. MFG Asset Management may have to lower the price, sell other securities instead or forego an investment opportunity.
Frontier MFG Global Equity Fund | Shareholder Ownership and Concentration Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Shareholder Ownership and Concentration Risks. A large percentage of the Fund’s shares are held by institutional investors. In many cases, the Fund does not have visibility as to the underlying beneficial owners of the Fund’s shares. A large redemption by one or more of these shareholders could result in the Fund selling securities when it otherwise would not have done so, accelerating the realization of capital gains and increasing transaction costs. A large redemption could also significantly reduce the Fund’s assets and increase the Fund’s expenses.
Frontier MFG Global Equity Fund | Sector Emphasis Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Sector Emphasis Risks. Sector emphasis risk is the possibility that investments within certain sectors may decline in price due to sector-specific economic developments.
Frontier MFG Global Equity Fund | Technology Sector Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Technology Sector Risks. To the extent that the Fund invests a significant portion of its assets in companies within the technology sector, there are risks that may affect technology companies. These risks include regulatory risks, the risk of a reduction in competitiveness and loss of market share, uncertainty regarding future revenue, and reputational or operational risks from significant data breaches or cyber-attacks.
Frontier MFG Global Equity Fund | Consumer Discretionary Sector Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Consumer Discretionary Sector Risks. To the extent that the Fund invests a significant portion of its assets in companies within the consumer discretionary sector, the Fund will be sensitive to risks affecting consumer discretionary companies. Companies in the consumer discretionary sector depend heavily on disposable household income and consumer spending, and such companies may be strongly affected by social trends and marketing campaigns. These companies may be subject to increased competition, which may have an adverse impact on their profitability.
Frontier MFG Global Equity Fund | Cash and Cash Equivalents Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Cash and Cash Equivalents Risks. Because the Fund typically holds cash and cash equivalents, the Fund risks achieving lower investment returns when the cash is not invested in securities that have appreciated in value, which could negatively impact the Fund’s performance and ability to achieve its investment objective.
Frontier MFG Global Equity Fund | Cybersecurity Risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Cybersecurity Risks. Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund can be potentially breached. The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Frontier MFG Global Equity Fund | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (18.14%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 6.14%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.85%
Frontier MFG Global Equity Fund | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Servicing Fee rr_Component1OtherExpensesOverAssets none
Additional Other Expenses rr_Component2OtherExpensesOverAssets 0.14% [1]
Total Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.94%
Less: Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [2]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.80%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 82
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 271
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 492
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,128
Annual Return 2013 rr_AnnualReturn2013 29.64%
Annual Return 2014 rr_AnnualReturn2014 5.75%
Annual Return 2015 rr_AnnualReturn2015 3.78%
Annual Return 2016 rr_AnnualReturn2016 4.12%
Annual Return 2017 rr_AnnualReturn2017 24.40%
Annual Return 2018 rr_AnnualReturn2018 (0.05%)
Annual Return 2019 rr_AnnualReturn2019 28.83%
Annual Return 2020 rr_AnnualReturn2020 10.19%
Annual Return 2021 rr_AnnualReturn2021 13.26%
Annual Return 2022 rr_AnnualReturn2022 (20.92%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (20.92%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.91%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.88%
Frontier MFG Global Equity Fund | Institutional Class | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (30.37%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 0.78%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 6.30%
Frontier MFG Global Equity Fund | Institutional Class | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (5.12%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.11%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.32%
Frontier MFG Global Equity Fund | Service Class  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Servicing Fee rr_Component1OtherExpensesOverAssets 0.15%
Additional Other Expenses rr_Component2OtherExpensesOverAssets 0.14% [1]
Total Other Expenses rr_OtherExpensesOverAssets 0.29%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.09%
Less: Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [2]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.95%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 97
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 318
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 573
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,303
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess The Service Class had not commenced operations as of the date of this Prospectus.
[1] Service Class shares had not commenced operations as of June 30, 2023. Accordingly, “Additional Other Expenses” for the Service Class shares are estimated based on other expenses of the Institutional Class shares of the Fund for the fiscal year ended June 30, 2023.
[2] Frontegra Asset Management, Inc. (“Frontegra”), the Fund’s investment adviser, has contractually agreed to waive its management fee and/or reimburse the Fund’s operating expenses to the extent necessary to ensure that the Fund’s total operating expenses (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses (“AFFE”) and extraordinary expenses) do not exceed 0.80% and 0.95% of the Fund’s average daily net assets attributable to the Institutional Class and Service Class shares, respectively. Frontegra is entitled to recoup the fees waived and/or expenses reimbursed within a three-year period from the date of the waiver or expense payment if such reimbursement will not cause the Fund’s expense ratio to exceed the lesser of: (a) the expense limitation in place at the time of the waiver and/or expense payment; or (b) the expense limitation in place at the time of the recoupment. The expense cap/reimbursement agreement will continue in effect until October 31, 2025, and may be terminated only by, or with the consent of, the Board of Directors of the Company.