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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Jun. 30, 2019
Entity Registrant Name dei_EntityRegistrantName FRONTIER FUNDS, INC.
Entity Central Index Key dei_EntityCentralIndexKey 0001014913
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Oct. 28, 2019
Document Effective Date dei_DocumentEffectiveDate Oct. 31, 2019
Prospectus Date rr_ProspectusDate Oct. 31, 2019
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Frontier Phocas Small Cap Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Frontier Phocas Small Cap Value Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Frontier Phocas Small Cap Value Fund (the “Fund”) is long-term total investment return through 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 and hold shares of the Fund.
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 10/31/2021
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 40% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 40.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies.  Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
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 shares of common stock of small-capitalization companies, consistent with companies within the Russell 2000® Value Index. As of September 30, 2019, the largest market capitalization of a company in the Russell 2000® Value Index was $5.521 billion and the weighted average market capitalization was $2.01 billion. The Fund also invests in Real Estate Investment Trusts (“REITs”) as part of its principal investment strategy.
 
The Fund pursues its investment objective by investing in a diversified portfolio of small-capitalization securities selling at discounts to their fair value as assessed by the investment and research team of Phocas Financial Corporation (“Phocas”), the Fund’s subadviser.  Phocas will typically invest in 100 to 120 companies with initial weightings between 0.25% to 1.00% of the Fund’s total assets in order to have broad industry representation and reduce individual security risk within the Fund.  Financial services is a very large segment of the Fund’s benchmark and, as such, it may represent a significant weight of the portfolio, oftentimes exceeding 25% of the Fund’s net assets.  As a result, the Fund may have significant investments in the financial services sector.
Risk [Heading] rr_RiskHeading Principal Investment Risks.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Market Risks.  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.  Volatility in share price is an inherent characteristic of equity markets.  Global economies and financial markets are increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region.  Market volatility may have adverse effects on the Fund.
 
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.
 
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.
 
REIT Risks.  A REIT’s share price may decline because of adverse developments affecting the underlying infrastructure 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.
 
Management Risks.  The Fund is subject to management risk as an actively-managed investment portfolio and depends on the decisions of the portfolio managers to produce the desired results.
 
Small Capitalization Company Risks.  Securities of companies with small market capitalizations are often more volatile, less liquid and more susceptible to market pressures than larger companies.

Value Investing Risks.  The Fund invests primarily in value-style stocks, stocks whose prices Phocas believes are undervalued in relation to fundamental measures.  Value stocks may never increase in price or pay dividends as anticipated by Phocas, or may decline even further if the market fails to recognize the company’s value, if the factors that Phocas believes will increase the price do not occur or if a stock judged to be undervalued is actually appropriately priced.
 
Sector Emphasis Risks.  Although Phocas selects stocks based on their individual merits, some economic sectors will represent a larger portion of the Fund’s overall investment portfolio than other sectors.  Potential negative market or economic developments affecting one of the larger sectors could have a greater impact on the Fund than on a fund with fewer holdings in that sector.
 
Financial Services Sector Risks.  To the extent that the Fund invests a significant portion of its assets in the financial services sector, the Fund’s performance may be adversely affected by volatility in financial and credit markets.  Financial services companies (e.g., banks and insurance companies) are subject to extensive government regulation, interest rate risk, credit losses and price competition, among other factors.
 
Cash and Cash Equivalents Risk.  To the extent the Fund holds cash and cash equivalents positions, the Fund risks achieving lower investment returns if 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.
 
Cybersecurity Risks.  Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund potentially can be breached.  The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Risk Lose Money [Text] rr_RiskLoseMoney If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance.
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The Fund is the successor to the Phocas Small Cap Value Fund (the “Predecessor Fund”) pursuant to a reorganization that was completed on October 8, 2010.  Prior to this date, the Fund had no investment operations.  Accordingly, the performance and financial information for periods prior to October 8, 2010, is historical information for the Predecessor Fund.  The Fund has investment objectives, strategies and policies substantially similar to the Predecessor Fund, which was advised by Phocas, the current subadviser to the Fund.  The Predecessor Fund was subject to different expenses than the Institutional Class shares offered by this prospectus.  Accordingly, the performance for the Predecessor Fund may differ from that of the Fund.
 
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 average annual total returns of the Fund 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(1)
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock
(1)
Returns for the calendar year 2009 and for the period from January 1, 2010, to October 7, 2010, reflect the performance of the Predecessor Fund.  Returns for the period from October 8, 2010, to October 31, 2012, reflect the performance of the Class L shares of the Fund.  Effective November 1, 2012, the Class L shares were redesignated as Institutional Class shares.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
The Fund’s return from January 1, 2019, through September 30, 2019, was 15.52%.

Best and Worst Quarterly Performance (during the periods shown above) 
Best Quarter Return
 
Worst Quarter Return
 
 
 
22.69% (3rd quarter, 2009)
 
(20.63)% (4th quarter, 2018)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s return from January 1, 2019, through September 30, 2019
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2019
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 15.52%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.69%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (20.63%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (For the periods ended December 31, 2018)
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 Phocas Small Cap Value Fund | Institutional Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FPSVX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption none
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.66%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.66%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.52% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.56%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.96% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 367
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 720
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,714
Annual Return 2009 rr_AnnualReturn2009 24.29%
Annual Return 2010 rr_AnnualReturn2010 29.94%
Annual Return 2011 rr_AnnualReturn2011 (5.99%)
Annual Return 2012 rr_AnnualReturn2012 9.75%
Annual Return 2013 rr_AnnualReturn2013 45.63%
Annual Return 2014 rr_AnnualReturn2014 7.19%
Annual Return 2015 rr_AnnualReturn2015 (4.35%)
Annual Return 2016 rr_AnnualReturn2016 23.31%
Annual Return 2017 rr_AnnualReturn2017 8.17%
Annual Return 2018 rr_AnnualReturn2018 (17.52%)
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes [4]
1 Year rr_AverageAnnualReturnYear01 (17.52%) [4]
5 Years rr_AverageAnnualReturnYear05 2.44% [4]
10 Years rr_AverageAnnualReturnYear10 10.59% [4]
Since Inception rr_AverageAnnualReturnSinceInception 6.23% [4],[5]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 29, 2006 [4]
Frontier Phocas Small Cap Value Fund | Institutional Class | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions [4]
1 Year rr_AverageAnnualReturnYear01 (21.67%) [4]
5 Years rr_AverageAnnualReturnYear05 0.55% [4]
10 Years rr_AverageAnnualReturnYear10 9.38% [4]
Since Inception rr_AverageAnnualReturnSinceInception 5.25% [4],[5]
Frontier Phocas Small Cap Value Fund | Institutional Class | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions and Sale of Fund Shares [4]
1 Year rr_AverageAnnualReturnYear01 (8.61%) [4]
5 Years rr_AverageAnnualReturnYear05 1.71% [4]
10 Years rr_AverageAnnualReturnYear10 8.66% [4]
Since Inception rr_AverageAnnualReturnSinceInception 4.97% [4],[5]
Frontier Phocas Small Cap Value Fund | Institutional Class | Russell 2000® Value Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Russell 2000® Value Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (12.86%)
5 Years rr_AverageAnnualReturnYear05 3.61%
10 Years rr_AverageAnnualReturnYear10 10.40%
Since Inception rr_AverageAnnualReturnSinceInception 5.29% [5]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 29, 2006
Frontier Phocas Small Cap Value Fund | Service Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FPVSX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption none
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 585.60%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 585.75%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 586.61% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (585.50%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.11% [1]
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The “Total Annual Fund Operating Expenses” and the “Total Annual Fund Operating Expenses After Fee Waiver” figures for the Service Class do not correlate to the Service Class’ “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because the Service Class shares did not accrue any shareholder servicing fees during the fiscal year ended June 30, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 113 [6]
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 353 [6]
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 612 [6]
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,352 [6]
Label rr_AverageAnnualReturnLabel Service Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (17.47%)
Since Inception rr_AverageAnnualReturnSinceInception 0.89% [7]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2016
Frontier Phocas Small Cap Value Fund | Service Class | Russell 2000® Value Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Russell 2000® Value Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (12.86%)
Since Inception rr_AverageAnnualReturnSinceInception 4.46% [7]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2016
Frontier MFG Core Infrastructure Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Frontier MFG Core Infrastructure Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Frontier MFG Core Infrastructure Fund (the “Fund”) is long-term 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 and hold shares of the Fund.
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 10/31/2021
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 18% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 18.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies.  Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
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 the equity securities of infrastructure companies.  Equity securities in which the Fund invests as part of its principal investment strategy consist of common stocks, stapled securities (an equity security comprised of multiple parts) and Real Estate Investment Trusts (REITs) of infrastructure companies.  The Fund will concentrate in the infrastructure sector and utilities industry.  The Fund will invest in both U.S. and non-U.S. companies of all market capitalizations, with a minimum market capitalization of U.S. $500 million at the time of purchase.

The Fund’s subadviser, Magellan Asset Management Limited doing business as MFG Asset Management (“MFG Asset Management”), seeks to provide investors with exposure to the infrastructure sector and to deliver stable investment returns relative to other equity funds.  The Fund invests in a diversified portfolio of securities of infrastructure companies that MFG Asset Management has determined have an appropriate capital structure, are likely to generate reliable income streams and are likely to benefit from inflation protection.  It is anticipated that the Fund’s portfolio will generally consist of 80 to 100 companies.
Risk [Heading] rr_RiskHeading Principal Investment Risks.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Market Risks.  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 years.  Global economies and financial markets are increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region.  Continuing market volatility may have adverse effects on the Fund.

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.

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.

Stapled Securities Risks.  A stapled security is a security that is comprised of multiple parts — generally, a trust and a share of a company — that cannot be separated from one another and is treated as one unit for trading purposes. The value of a stapled security may go down as a result of the performance of any part of the security.

REIT Risks.  A REIT’s share price may decline because of adverse developments affecting the underlying infrastructure 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.

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 imposition of foreign withholding taxes.

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.

Management Risks.  The Fund is subject to management risk as an actively-managed investment portfolio and depends on the decisions of the portfolio management team to produce the desired results.

Concentration Risk.  The Fund’s investments in infrastructure companies will expose the Fund to potential adverse economic, regulatory, political and other changes affecting such investments.  Issuers of securities in infrastructure-related businesses are subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental or other regulations and the effects of economic slowdowns.  Rising interest rates could lead to higher financing costs and reduced earnings for infrastructure companies.  Specific infrastructure assets in which the Fund invests may be subject to the following additional risks:
 
•
Communication infrastructure companies are subject to risks involving changes in government regulation, competition, dependency on patent protection, equipment incompatibility, changing consumer preferences, technological obsolescence and large capital expenditures and debt burdens.
 
•
Energy infrastructure companies are subject to adverse changes in fuel prices, the effects of energy conservation policies and other risks, such as increased regulation, negative effects of economic slowdowns, reduced demand, cleanup and litigation costs as a result of environmental damage, changing and international politics and regulatory policies of various governments.  Natural disasters or terrorist attacks damaging sources of energy supplies will also negatively impact energy companies.
 
•
Social infrastructure companies are subject to government regulation and the costs of compliance with such regulations and delays or failures in receiving required regulatory approvals.  The enactment of new or additional regulatory requirements may negatively affect the business of a social infrastructure company.
 
•
Transportation infrastructure companies can be significantly affected by economic changes, fuel prices, labor relations, insurance costs and government regulations.  Transportation infrastructure companies will also be negatively impacted by natural disasters or terrorist attacks.
 
•
Utility company revenues and costs are subject to regulation by states and other regulators.  Regulatory authorities also may restrict a company’s access to new markets.  Utilities companies may incur unexpected increases in fuel and other operating costs.  Utilities are also subject to considerable costs associated with environmental compliance, nuclear waste clean-up and safety regulation.
 
Small- and Medium-Capitalization Company Risks.  Small-capitalization and medium-capitalization companies are often more volatile and less liquid than larger companies.  Securities of these companies may be subject to greater and more abrupt price fluctuations and may be more susceptible to market pressures and business failures.  Stocks of small and medium-sized companies may underperform the stocks of larger companies as an asset class.
 
Cybersecurity Risks.  Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund potentially can be breached.  The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Risk Lose Money [Text] rr_RiskLoseMoney If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money.
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 average annual total returns of the Fund 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, 2019, through September 30, 2019, was 22.33%.
 
Best and Worst Quarterly Performance (during the periods shown above)
 
Best Quarter Return
 
Worst Quarter Return
 
 
 
10.37% (1st quarter, 2016)
 
(5.41)% (4th quarter, 2016)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s return from January 1, 2019, through September 30, 2019
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2019
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 22.33%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 30, 2016
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.37%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.41%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (For the periods ended December 31, 2018)
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 Core Infrastructure Fund | S&P Global Infrastructure Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel S&P Global Infrastructure Index
1 Year rr_AverageAnnualReturnYear01 (9.50%)
5 Years rr_AverageAnnualReturnYear05 4.10%
Since Inception rr_AverageAnnualReturnSinceInception 6.62% [8]
Frontier MFG Core Infrastructure Fund | Institutional Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMGIX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [9]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.61% [10]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.52% [10]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 53
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 177
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 322
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 745
Annual Return 2013 rr_AnnualReturn2013 12.41%
Annual Return 2014 rr_AnnualReturn2014 16.63%
Annual Return 2015 rr_AnnualReturn2015 (1.03%)
Annual Return 2016 rr_AnnualReturn2016 6.18%
Annual Return 2017 rr_AnnualReturn2017 20.25%
Annual Return 2018 rr_AnnualReturn2018 (6.61%)
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (6.61%)
5 Years rr_AverageAnnualReturnYear05 6.60%
Since Inception rr_AverageAnnualReturnSinceInception 8.72% [8]
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 18, 2012
Frontier MFG Core Infrastructure Fund | Institutional Class | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (7.11%)
5 Years rr_AverageAnnualReturnYear05 6.08%
Since Inception rr_AverageAnnualReturnSinceInception 8.24% [8]
Frontier MFG Core Infrastructure Fund | Institutional Class | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (3.27%)
5 Years rr_AverageAnnualReturnYear05 5.32%
Since Inception rr_AverageAnnualReturnSinceInception 7.16% [8]
Frontier MFG Core Infrastructure Fund | Institutional Class | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (8.71%)
5 Years rr_AverageAnnualReturnYear05 4.56%
Since Inception rr_AverageAnnualReturnSinceInception 8.59% [8]
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 18, 2012
Frontier MFG Core Infrastructure Fund | Service Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FCIVX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.50%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.25%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02% [9]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.77% [10]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.67% [10]
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Further, the “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.10% for the fiscal year ended June 30, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 68
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 225
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 408
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 935
Label rr_AverageAnnualReturnLabel Service Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (6.54%)
Since Inception rr_AverageAnnualReturnSinceInception 1.76% [8]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2016
Frontier MFG Core Infrastructure Fund | Service Class | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (8.71%)
Since Inception rr_AverageAnnualReturnSinceInception 6.20% [8]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2016
Frontier MFG Core Infrastructure Fund | Service Class | S&P Global Infrastructure Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel S&P Global Infrastructure Index
1 Year rr_AverageAnnualReturnYear01 (9.50%)
Since Inception rr_AverageAnnualReturnSinceInception 2.30% [8]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2016
Frontier MFG Global Equity Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Frontier MFG Global Equity Fund
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 and hold shares of the Fund.
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 10/31/2021
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 34% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies.  Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
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.  MFG Asset Management seeks to identify high-quality companies at attractive prices while integrating an in-depth macroeconomic understanding in order to manage risk.  The Fund will normally hold a limited number (generally 20 to 40) of 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.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Market Risks.  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 years.  Global economies and financial markets are increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region.  Continuing market volatility may have adverse effects on the Fund.
 
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.
 
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.
 
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 funds that invest in a greater number of companies.
 
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.

Large Capitalization Risks.  Large-cap companies perform differently from, and at times and for extended periods of time worse than, stocks of mid- and small-cap companies.  Larger, more established companies may be unable to respond quickly to new competitive challenges.
 
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 imposition of foreign withholding taxes.
 
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.
 
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.
 
Management Risks.  The Fund is subject to management risk as an actively-managed investment portfolio and depends on the decisions of the portfolio manager to produce the desired results.
 
Sector Emphasis Risks.  Although MFG Asset Management selects stocks based on their individual merits, some economic sectors will represent a larger portion of the Fund’s overall investment portfolio than other sectors.  Potential negative market or economic developments affecting one of the larger sectors could have a greater impact on the Fund than on a fund with fewer holdings in that sector.
 
Technology Sector Risk.  To the extent that the Fund invests a significant portion of its assets in established companies within the technology sector, there are risks that may affect such companies. These risks include regulatory risk, 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.
 
Cash and Cash Equivalents Risk.  To the extent the Fund holds cash and cash equivalents the Fund risks achieving lower investment returns if 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.
 
Cybersecurity Risks.  Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund potentially can be breached.  The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Risk Lose Money [Text] rr_RiskLoseMoney If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus 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 funds that invest in a greater number of companies.
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 average annual total returns of the Fund 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, 2019, through September 30, 2019, was 19.70%.
 
Best and Worst Quarterly Performance (during the periods shown above)
Best Quarter Return
 
Worst Quarter Return
 
 
 
11.22% (1st quarter, 2013)
 
(9.24)% (4th quarter, 2018)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s return from January 1, 2019, through September 30, 2019
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2019
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 19.70%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 30, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.22%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (9.24%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (For the periods ended December 31, 2018)
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 | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes) [12]
1 Year rr_AverageAnnualReturnYear01 (8.71%) [12]
5 Years rr_AverageAnnualReturnYear05 4.56% [12]
Since Inception rr_AverageAnnualReturnSinceInception 9.23% [12],[13]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 28, 2011 [12]
Frontier MFG Global Equity Fund | Institutional Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMGEX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.05% [14]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.05%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [15]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.88%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [16]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 270
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 478
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,075
Annual Return 2012 rr_AnnualReturn2012 19.46%
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%)
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes [12]
1 Year rr_AverageAnnualReturnYear01 (0.05%) [12]
5 Years rr_AverageAnnualReturnYear05 7.28% [12]
Since Inception rr_AverageAnnualReturnSinceInception 11.86% [12],[13]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 28, 2011 [12]
Frontier MFG Global Equity Fund | Institutional Class | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions [12]
1 Year rr_AverageAnnualReturnYear01 (2.29%) [12]
5 Years rr_AverageAnnualReturnYear05 6.06% [12]
Since Inception rr_AverageAnnualReturnSinceInception 10.82% [12],[13]
Frontier MFG Global Equity Fund | Institutional Class | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions and Sale of Fund Shares [12]
1 Year rr_AverageAnnualReturnYear01 1.55% [12]
5 Years rr_AverageAnnualReturnYear05 5.62% [12]
Since Inception rr_AverageAnnualReturnSinceInception 9.53% [12],[13]
Frontier MFG Global Equity Fund | Service Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMGSX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.05% [14]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [15]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.03%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [16]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.98%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Service Class shares had not commenced operations as of June 30, 2019.  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, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 318
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 559
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,250
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess The Service Class had not commenced operations as of the date of this prospectus.  Accordingly, the information provided represents returns of the Institutional Class.
Frontier MFG Global Plus Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Frontier MFG Global Plus Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Frontier MFG Global Plus 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 and hold shares of the Fund.
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 10/31/2021
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 56% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 56.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies.  Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
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.  MFG Asset Management seeks to identify high-quality companies at attractive prices while integrating an in-depth macroeconomic understanding in order to manage risk.  The Fund will normally hold a limited number (generally 20 to 40) of companies, typically with a market capitalization in excess of U.S. $25 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.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Market Risks.  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 years.  Global economies and financial markets are increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region.  Continuing market volatility may have adverse effects on the Fund.

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.

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.

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 funds that invest in a greater number of companies.

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.

Large Capitalization Risks.  Large-cap companies perform differently from, and at times and for extended periods of time worse than, stocks of mid- and small-cap companies.  Larger, more established companies may be unable to respond quickly to new competitive challenges.

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 imposition of foreign withholding taxes.

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.

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.

Management Risks.  The Fund is subject to management risk as an actively-managed investment portfolio and depends on the decisions of the portfolio manager to produce the desired results.

Sector Emphasis Risks.  Although MFG Asset Management selects stocks based on their individual merits, some economic sectors will represent a larger portion of the Fund’s overall investment portfolio than other sectors.  Potential negative market or economic developments affecting one of the larger sectors could have a greater impact on the Fund than on a fund with fewer holdings in that sector.

Technology Sector Risk.  To the extent that the Fund invests a significant portion of its assets in established companies within the technology sector, there are risks that may affect such companies. These risks include regulatory risk, 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.

Cash and Cash Equivalents Risk.  To the extent the Fund holds cash and cash equivalents, the Fund risks achieving lower investment returns if 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.

Cybersecurity Risks.  Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund potentially can be breached.  The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Risk Lose Money [Text] rr_RiskLoseMoney If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money. 
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus 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 funds that invest in a greater number of companies.
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 average annual total returns of the Fund 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, 2019, through September 30, 2019, was 19.62%.
 
Best and Worst Quarterly Performance (during the periods shown above)
Best Quarter Return
 
Worst Quarter Return
 
 
 
7.47% (1st quarter, 2017)
 
(9.14)% (4th quarter, 2018)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund’s return from January 1, 2019, through September 30, 2019,
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2019
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 19.62%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.47%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (9.14%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (For the periods ended December 31, 2018)
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 and Class Y 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 and Class Y 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 Plus Fund | Institutional Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMGPX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09% [17]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [18]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.92% [19]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [20]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.83% [18]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 275
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 491
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,114
Annual Return 2016 rr_AnnualReturn2016 3.46%
Annual Return 2017 rr_AnnualReturn2017 24.49%
Annual Return 2018 rr_AnnualReturn2018 (0.12%)
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes [21]
1 Year rr_AverageAnnualReturnYear01 (0.12%) [21]
Since Inception rr_AverageAnnualReturnSinceInception 6.61% [21],[22]
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 23, 2015 [21]
Frontier MFG Global Plus Fund | Institutional Class | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions [21]
1 Year rr_AverageAnnualReturnYear01 (3.32%) [21]
Since Inception rr_AverageAnnualReturnSinceInception 5.43% [21],[22]
Frontier MFG Global Plus Fund | Institutional Class | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Institutional Class Return After Taxes on Distributions and Sale of Fund Shares [21]
1 Year rr_AverageAnnualReturnYear01 1.27% [21]
Since Inception rr_AverageAnnualReturnSinceInception 4.90% [21],[22]
Frontier MFG Global Plus Fund | Institutional Class | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes) [21]
1 Year rr_AverageAnnualReturnYear01 (8.71%) [21]
Since Inception rr_AverageAnnualReturnSinceInception 3.55% [21],[22]
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 23, 2015 [21]
Frontier MFG Global Plus Fund | Service Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMPSX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09% [17]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.24%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [18]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.07% [19]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [20]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.98% [18]
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.09% for the fiscal year ended June 30, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 322
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 572
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,289
Label rr_AverageAnnualReturnLabel Service Class Return Before Taxes [21]
1 Year rr_AverageAnnualReturnYear01 (0.25%) [21]
Since Inception rr_AverageAnnualReturnSinceInception 10.39% [21],[22]
Inception Date rr_AverageAnnualReturnInceptionDate May 09, 2016 [21]
Frontier MFG Global Plus Fund | Service Class | MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel MSCI World Index (Net) (reflects no deductions for fees, expenses or taxes) [21]
1 Year rr_AverageAnnualReturnYear01 (8.71%) [21]
Since Inception rr_AverageAnnualReturnSinceInception 7.33% [21],[22]
Inception Date rr_AverageAnnualReturnInceptionDate May 09, 2016 [21]
Frontier MFG Global Plus Fund | Class Y  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMGYX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09% [17]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.24%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [18]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.32% [19]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [20]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.22% [18]
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Class Y shares had not commenced operations as of June 30, 2019.  Accordingly, “Additional Other Expenses” for the Class Y shares are estimated based on other expenses of the Institutional Class shares of the Fund for the fiscal year ended June 30, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 125
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 400
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 706
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,574
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Class Y shares had not commenced operations as of December 31, 2018.  Accordingly, the information provided represents returns of the Institutional Class and the Service Class.
Frontier MFG Select Infrastructure Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Frontier MFG Select Infrastructure Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Frontier MFG Select Infrastructure Fund (the “Fund”) is to seek attractive risk-adjusted returns over the medium- to long-term, while reducing the risk of permanent capital loss.
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 and hold shares of the Fund.
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 10/31/2021
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 the fiscal period from July 2, 2018 (commencement of operations) to June 30, 2019, the Fund’s portfolio turnover rate was 29%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 29.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies.  Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
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 a minimum of 80% of its net assets in the equity securities of infrastructure companies.  The Fund will invest in common stock, stapled securities (an equity security comprised of multiple parts) and Real Estate Investment Trusts (REITs) of infrastructure companies as part of its principal investment strategy.  The Fund will concentrate in the securities of companies operating in infrastructure-related industries.  The Fund will invest in both U.S. and non-U.S. companies and may invest in companies of any size, with a minimum market capitalization of $500 million.
 
The Fund’s subadviser, Magellan Asset Management Limited doing business as MFG Asset Management (“MFG Asset Management”) seeks to provide investors with exposure to the infrastructure sector and to deliver stable investment returns relative to other equity funds.  The Fund will invest in a non-diversified portfolio of securities of infrastructure companies that MFG Asset Management has determined have an appropriate capital structure, are likely to generate reliable income streams and are likely to benefit from inflation protection.  The Fund will normally hold a limited number (typically 20 to 40) of companies that meet these criteria.  The Fund will typically hold up to 20% of its assets in cash and cash equivalents.
Risk [Heading] rr_RiskHeading Principal Investment Risks.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Market Risks.  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 years.  Global economies and financial markets are increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region.  Continuing market volatility may have adverse effects on the Fund.

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.

REIT Risks.  A REIT’s share price may decline because of adverse developments affecting the underlying infrastructure 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.

Stapled Securities Risks.  A stapled security is a security that is comprised of multiple parts — generally, a trust and a share of a company — that cannot be separated from one another and is treated as one unit for trading purposes.  The value of a stapled security may go down as a result of the performance of any part of the security.

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 funds that invest in a greater number of companies.

Management Risks.  The Fund is subject to management risk as an actively-managed investment portfolio and depends on the decisions of the portfolio manager to produce the desired results.

Concentration Risk.  The Fund’s investments in infrastructure companies will expose the Fund to potential adverse economic, regulatory, political and other changes affecting such investments.  Issuers of securities in infrastructure-related businesses are subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental or other regulations and the effects of economic slowdowns.  Rising interest rates could lead to higher financing costs and reduced earnings for infrastructure companies.  Specific infrastructure assets in which the Fund invests may be subject to the following additional risks:

•
Communication infrastructure companies are subject to risks involving changes in government regulation, competition, dependency on patent protection, equipment incompatibility, changing consumer preferences, technological obsolescence and large capital expenditures and debt burdens.

•
Energy infrastructure companies are subject to adverse changes in fuel prices, the effects of energy conservation policies and other risks, such as increased regulation, negative effects of economic slowdowns, reduced demand, cleanup and litigation costs as a result of environmental damage, changing and international politics and regulatory policies of various governments.  Natural disasters or terrorist attacks damaging sources of energy supplies will also negatively impact energy companies.

•
Social infrastructure companies are subject to government regulation and the costs of compliance with such regulations and delays or failures in receiving required regulatory approvals.  The enactment of new or additional regulatory requirements may negatively affect the business of a social infrastructure company.

•
Transportation infrastructure companies can be significantly affected by economic changes, fuel prices, labor relations, insurance costs and government regulations.  Transportation infrastructure companies will also be negatively impacted by natural disasters or terrorist attacks.

•
Utility company revenues and costs are subject to regulation by states and other regulators.  Regulatory authorities also may restrict a company’s access to new markets.  Utilities companies may incur unexpected increases in fuel and other operating costs.  Utilities are also subject to considerable costs associated with environmental compliance, nuclear waste clean-up and safety regulation.

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.
 
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 imposition of foreign withholding taxes.

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.
 
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.
 
Large Capitalization Risks.  Large-cap companies perform differently from, and at times and for extended periods of time worse than, stocks of mid- and small-cap companies.  Larger, more established companies may be unable to respond quickly to new competitive challenges.
 
New Fund Risks.  As a new fund, there can be no assurance that the Fund will grow or maintain an economically viable size.
 
Cash and Cash Equivalents Risk.  To the extent the Fund holds cash and cash equivalents the Fund risks achieving lower investment returns if 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.
 
Liquidity Risks.  Liquidity risk is the risk that certain securities may be difficult or impossible to sell the quantity or sell at the time and price that MFG Asset Management would like to sell.  MFG Asset Management may have to lower the price, sell other securities instead or forego an investment opportunity.
 
Cybersecurity Risks.  Despite the various protections utilized by the Fund and its service providers, systems, networks, or devices utilized by the Fund potentially can be breached.  The Fund and its shareholders could be negatively impacted as a result of a cybersecurity breach.
Risk Lose Money [Text] rr_RiskLoseMoney If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus 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 funds that invest in a greater number of companies.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance.
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
Performance information for the Fund is not included because the Fund does not have returns for one full calendar year.  Updated performance information is available on the Company’s website, www.frontiermutualfunds.com, or by calling toll-free 1-800-825-2100.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund does not have returns for one full calendar year.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-825-2100
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.frontiermutualfunds.com
Frontier MFG Select Infrastructure Fund | Institutional Class Shares  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMSIX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.44%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.44%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [23]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.25% [24]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [25]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 307
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 599
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,431
Frontier MFG Select Infrastructure Fund | Service Class Shares  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol FMSSX
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Redemption Fee rr_RedemptionFee $ (15.00)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.15%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.45%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.60%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [23]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.41% [24]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.45%) [25]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.96%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.10% for the fiscal period ended June 30, 2019.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 355
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 683
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,611
[1] Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
[2] The “Total Annual Fund Operating Expenses” and the “Total Annual Fund Operating Expenses After Fee Waiver” figures for the Service Class do not correlate to the Service Class’ “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because the Service Class shares did not accrue any shareholder servicing fees during the fiscal year ended June 30, 2019.
[3] 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, AFFE and extraordinary expenses) do not exceed 0.95% and 1.10% 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, 2021 and may be terminated only by, or with the consent of, the Board of Directors of the Company.
[4] Fund returns for the period from January 1, 2008 to October 7, 2010, reflect the performance of the Predecessor Fund. Fund returns for the period from October 8, 2010, to October 31, 2012, reflect the performance of the Class L shares of the Fund. Effective November 1, 2012, the Class L shares were redesignated as Institutional Class shares.
[5] The Institutional Class shares commenced operations on September 29, 2006.
[6] The contractual expense cap of 1.10%, plus AFFE of 0.01%, was used to calculate the Expense Example throughout the 10 years due to the small size of the Service Class shares as of June 30, 2019.
[7] The Service Class shares commenced operations on July 15, 2016.
[8] The Institutional Class and the Service Class commenced operations on January 18, 2012, and July 15, 2016, respectively.
[9] Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
[10] Effective July 1, 2019, the management fee was reduced from 0.70% to 0.50%. Therefore, the “Total Annual Fund Operating Expenses” figure does not correlate to the Institutional Class’ “Ratio of expenses to average net assets before waivers and reimbursements” figure for the Institutional Class in the Financial Highlights section of this Prospectus. Further, the “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.10% for the fiscal year ended June 30, 2019.
[11] 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, AFFE and extraordinary expenses) do not exceed 0.50% and 0.65% of the Fund’s average daily net assets attributable to 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, 2021 and may be terminated only by, or with the consent of, the Board of Directors of the Company.
[12] The Service Class had not commenced operations as of the date of this prospectus. Accordingly, the information provided represents returns of the Institutional Class.
[13] The Institutional Class commenced operations on December 28, 2011.
[14] Service Class shares had not commenced operations as of June 30, 2019. 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, 2019.
[15] Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
[16] 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, 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, 2021 and may be terminated only by, or with the consent of, the Board of Directors of the Company.
[17] Class Y shares had not commenced operations as of June 30, 2019. Accordingly, “Additional Other Expenses” for the Class Y shares are estimated based on other expenses of the Institutional Class shares of the Fund for the fiscal year ended June 30, 2019.
[18] Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
[19] The “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.09% for the fiscal year ended June 30, 2019.
[20] 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, AFFE and extraordinary expenses) do not exceed 0.80%, 0.95% and 1.20% of the Fund’s average daily net assets attributable to the Institutional Class, Service Class and Class Y 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, 2021 and may be terminated only by, or with the consent of, the Board of Directors of the Company.
[21] Class Y shares had not commenced operations as of December 31, 2018. Accordingly, the information provided represents returns of the Institutional Class and the Service Class.
[22] The Institutional Class and the Service Class commenced operations on March 23, 2015, and May 9, 2016, respectively.
[23] Acquired Fund Fees and Expenses (“AFFE”) are fees and expenses incurred by the Fund in connection with its investments in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratio of expenses to average net assets appearing in the Financial Highlights table, which does not include AFFE.
[24] The “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waiver” for Service Class shares do not correlate to the “Ratio of expenses to average net assets” figures in the Financial Highlights section of this Prospectus because Service Class shares accrued shareholder servicing fees in the amount of 0.10% for the fiscal period ended June 30, 2019.
[25] 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, 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, 2021 and may be terminated only by, or with the consent of, the Board of Directors of the Company.