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Pear Tree Polaris Foreign Value Small Cap Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Pear Tree Polaris Foreign Value Small Cap Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective:
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
 Long-term growth of capital and income.
Expense [Heading] rr_ExpenseHeading Fee Table and Expenses of Foreign Value Small Cap 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 Foreign Value Small Cap Fund.
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 Jul. 31, 2023
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
Foreign Value Small Cap 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 Foreign Value Small Cap Fund’s performance. During the most recent fiscal year, Foreign Value Small Cap Fund’s portfolio turnover rate was 29 percent of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 29.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in Foreign Value Small Cap Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in Foreign Value Small Cap Fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5 percent return each year and that Foreign Value Small Cap Fund’s operating expenses remain the same as set forth in the table above. The example also assumes that the fee waiver and expense reimbursement agreements currently in effect expire July 31, 2023; therefore, amounts for 3-, 5- and 10-year periods do not include any adjustment to reflect any fee waivers or expense reimbursements. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, Foreign Value Small Cap Fund invests at least 80 percent of its net assets (plus borrowings for investment purposes) in equity securities issued by foreign markets, small-cap value issuers. A foreign markets issuer is an issuer operating in any industry sector that derives at least 50 percent of its gross revenues or profits from goods or services produced in non-U.S. markets or from sales made in non-U.S. markets. A small-cap issuer is a company having a market capitalization at time of purchase between $50 million to $5 billion. Equity securities include common and preferred shares, warrants and other rights derivative of or convertible into common stocks, American Depositary Receipts (ADRs), and Indian participatory notes (generally an interest in a pool of Indian-listed securities that is traded exclusively outside India by non-Indian registered investors), as well as shares of mutual funds
and exchange-traded funds (ETFs), each of which invests at least 80 percent of its net assets in similar securities issued by foreign markets, small cap value issuers.
To manage Foreign Value Small Cap Fund’s portfolio, its sub-adviser seeks to identify 50 to 100 value securities, that is, foreign markets, small-cap securities that the sub-adviser considers as being mispriced by the market but having the best opportunity for price appreciation to reflect their long-term fundamental valuations and/or future cash flows. To select specific investments, the sub-adviser uses a proprietary quantitative investment process focused on bottom-up fundamental research. Foreign Value Small Cap Fund is "non-diversified," which means that it may invest a higher percentage of its assets in a smaller number of issuers.
Foreign Value Small Cap Fund’s sub-adviser may utilize options in an attempt to improve the risk/return profile of Foreign Value Small Cap Fund’s returns. Foreign Value Small Cap Fund also may for hedging purposes buy and sell forward foreign currency exchange contracts in connection with its investments.
Generally, Foreign Value Small Cap Fund invests in foreign markets issuers in Europe, Australia, as well as the larger capital markets of the Far East. Foreign Value Small Cap Fund, however, also may invest without limit in emerging markets issuers. However, Foreign Value Small Cap Fund may be invested in securities from any country, any industry sector, or of any market capitalization amount.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, Foreign Value Small Cap Fund invests at least 80 percent of its net assets (plus borrowings for investment purposes) in equity securities issued by foreign markets, small-cap value issuers. A foreign markets issuer is an issuer operating in any industry sector that derives at least 50 percent of its gross revenues or profits from goods or services produced in non-U.S. markets or from sales made in non-U.S. markets. A small-cap issuer is a company having a market capitalization at time of purchase between $50 million to $5 billion. Equity securities include common and preferred shares, warrants and other rights derivative of or convertible into common stocks, American Depositary Receipts (ADRs), and Indian participatory notes (generally an interest in a pool of Indian-listed securities that is traded exclusively outside India by non-Indian registered investors), as well as shares of mutual funds
Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
It is possible to lose money by investing in Foreign Value Small Cap Fund. An investment in Foreign Value Small Cap Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Market, Industry and Specific Holdings. The share price of Foreign Value Small Cap Fund may fall because of weakness in and external shocks to the stock markets, generally, weakness with respect to a particular industry in which Foreign Value Small Cap Fund has significant holdings, or weaknesses associated with one or more specific companies in which Foreign Value Small Cap Fund may have substantial investments.
Foreign Securities, including Emerging Markets Securities.  Foreign Value Small Cap Fund’s investments in or exposure to foreign securities (including ADRs) may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar. The risks of foreign investing are heightened for securities of issuers in emerging market countries. Emerging market countries tend to have economic structures that are less diverse and mature and political systems that are less stable. They also are more susceptible to governmental interference, do not require issuers to publish quality current financial information, and tend to have less liquid and efficient trading markets than those of developed countries. The value of a foreign security may change materially at times when U.S. markets are not open for trading.
Value Stock Investing. A value investment style periodically comes into and falls out of favor with investors. Value stocks typically carry the risk that market prices may never recognize their intrinsic values.
Small- and Micro-Capitalization Securities. Investments in small- and micro-capitalization companies typically present greater risks than investments in larger companies and, as a result, the performance of Foreign Value Small Cap Fund may be more volatile than a fund that invests only in large- and mid-cap stocks.
Liquidity Risk.  To meet shareholder redemption requests and other cash requirements, Foreign Value Small Cap Fund may have to sell certain portfolio securities at times when there may be few, if any, buyers, causing Foreign Value Small Cap Fund to accept sale prices below the amounts that had been used by the fund to determine its net asset value.
Investment Strategies, Generally, and Quantitative Investment Risk.  Foreign Value Small Cap Fund’s investment strategy is based on assumptions of market and investor behavior. There are risks that those assumptions are incorrect, become outdated, or do not apply to specific market and political events. In those cases, the investment strategy is likely not to operate as anticipated, causing a loss in the value of Foreign Value Small Cap Fund's portfolio. Foreign Value Small Cap Fund’s quantitative investment model is more complex than a typical non-quantitative strategy, and thus, may be less predictable in how it may react to specific market or political events.
Risks of Investing in ADRs. The risks of investing in ADRs include the risks of investing in individual U.S. equities, but they also include risks associated with investing in foreign equities. In addition, an ADR may not track the price of its associated underlying foreign security.
Currency and Option Contracts and Other Derivatives.  Foreign Value Small Cap Fund’s investments in currency futures, forwards, options and other derivative instruments are subject to a number of risks, such as counterparty risk, the
risk of mispricing or improper valuation, and the risk that the value of the instrument may not increase or decrease as expected. Options contracts also are subject to the risks of leveraged transactions, and it may be difficult or impossible for Foreign Value Small Cap Fund to liquidate an open option contract.
Investments in Other Collective Investment Funds. To the extent that Foreign Value Small Cap Fund invests in mutual funds and exchange-traded funds (ETFs), Foreign Value Small Cap Fund's investment performance would be directly related to the investment performance of the other funds. It also would bear its proportionate share of any management and other fees paid by the other funds, subjecting Foreign Value Small Cap Fund shareholders to some duplication of fees.
Non-Diversification.  Foreign Value Small Cap Fund is “non-diversified,” As a result, a decline in the value of the securities of one issuer could have a significant negative effect on Foreign Value Small Cap Fund.
Sector.  Foreign Value Small Cap Fund does not have a policy of investing a significant portion of its assets in any particular industry sector. From time to time, however, it may have significant investments in one or more specific industry sectors, subjecting it to risks of that sector, which may be greater than general market risk.
Regional/Country Focus.  Foreign Value Small Cap Fund does not have a policy of investing a significant portion of its assets in any particular region or country, However, to the extent that Foreign Value Small Cap Fund focuses its investments in a particular geographic region or country, it may be subject to increased currency, political, regulatory and other risks associated with that region or country.
Please refer to “Fund Objectives, Strategies and Risks” in the Prospectus for further details.
Risk Lose Money [Text] rr_RiskLoseMoney It is possible to lose money by investing in Foreign Value Small Cap Fund.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Foreign Value Small Cap Fund is “non-diversified,” As a result, a decline in the value of the securities of one issuer could have a significant negative effect on Foreign Value Small Cap Fund.
RIsk Not Insured [Text] rr_RiskNotInsured An investment in Foreign Value Small Cap Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Past Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table provide some indication of the risks of investing in Foreign Value Small Cap Fund by showing changes in Foreign Value Small Cap Fund’s performance over time. The tables also compare Foreign Value Small Cap Fund’s performance to a broad measure of market performance that reflects the type of securities in which Foreign Value Small Cap Fund invests. Past performance does not necessarily indicate how Foreign Value Small Cap Fund will perform (before and after taxes) in the future. Updated performance information is available at www.peartreefunds.com
A Note on Performance
Ordinary Shares and Institutional Shares each commenced operations on May 1, 2008. R6 Shares commenced operations on February 6, 2017.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in Foreign Value Small Cap Fund by showing changes in Foreign Value Small Cap Fund’s performance over time.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.peartreefunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance does not necessarily indicate how Foreign Value Small Cap Fund will perform (before and after taxes) in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns — Ordinary Shares The bar chart below provides performance information for Foreign Value Small Cap Fund’s Ordinary Shares.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Calendar year-to-date return of the Ordinary Shares of Foreign Value Small Cap Fund as of June 30, 2022 was (19.57)%.
​ Best Quarter: ​ ​
Q4 2020
 ​ ​ ​ ​ 22.95% ​ ​
​ Worst Quarter: ​ ​
Q1 2020
 ​ ​ ​ ​ (30.70)% ​ ​
Year to Date Return, Label rr_YearToDateReturnLabel Calendar year-to-date return of the Ordinary Shares of Foreign Value Small Cap Fund
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2022
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (19.57%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.95%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (30.70%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns for the periods ended December 31, 2021
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate .  After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Ordinary Shares and after-tax returns for Institutional Shares and R6 Shares may vary.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-Tax Returns.  After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement. After-tax returns are shown only for Ordinary Shares and after-tax returns for Institutional Shares and R6 Shares may vary. Actual after-tax returns may differ depending on your individual circumstances.
Pear Tree Polaris Foreign Value Small Cap Fund | MSCI ACWI ex USA Small Cap (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 13.36%
5 Years rr_AverageAnnualReturnYear05 11.63%
10 Years rr_AverageAnnualReturnYear10 9.86%
Pear Tree Polaris Foreign Value Small Cap Fund | Ordinary Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.26%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets none
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.51%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.10% [1]
Total Annual Fund Operating Expenses after Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.41% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 144
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 467
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 814
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,793
Annual Return 2012 rr_AnnualReturn2012 27.11%
Annual Return 2013 rr_AnnualReturn2013 24.95%
Annual Return 2014 rr_AnnualReturn2014 6.54%
Annual Return 2015 rr_AnnualReturn2015 (1.49%)
Annual Return 2016 rr_AnnualReturn2016 2.46%
Annual Return 2017 rr_AnnualReturn2017 33.06%
Annual Return 2018 rr_AnnualReturn2018 (19.09%)
Annual Return 2019 rr_AnnualReturn2019 20.24%
Annual Return 2020 rr_AnnualReturn2020 6.36%
Annual Return 2021 rr_AnnualReturn2021 15.11%
1 Year rr_AverageAnnualReturnYear01 15.11%
5 Years rr_AverageAnnualReturnYear05 9.65%
10 Years rr_AverageAnnualReturnYear10 10.47%
Pear Tree Polaris Foreign Value Small Cap Fund | Ordinary Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.68%
5 Years rr_AverageAnnualReturnYear05 9.08%
10 Years rr_AverageAnnualReturnYear10 9.95%
Pear Tree Polaris Foreign Value Small Cap Fund | Ordinary Shares | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.47%
5 Years rr_AverageAnnualReturnYear05 7.75%
10 Years rr_AverageAnnualReturnYear10 8.63%
Pear Tree Polaris Foreign Value Small Cap Fund | Institutional Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.26%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets none
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.26%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.22% [1],[2]
Total Annual Fund Operating Expenses after Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.04% [1],[2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 106
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 378
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 671
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,503
1 Year rr_AverageAnnualReturnYear01 15.56%
5 Years rr_AverageAnnualReturnYear05 10.03%
10 Years rr_AverageAnnualReturnYear10 10.81%
Pear Tree Polaris Foreign Value Small Cap Fund | R6 Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.12%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets none
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.12%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.10% [1]
Total Annual Fund Operating Expenses after Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.02% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 346
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 607
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,354
1 Year rr_AverageAnnualReturnYear01 15.69%
[1] The Manager has contractually agreed until July 31, 2023 to waive such portion of the management fees that it would otherwise receive under its agreement with Pear Tree Funds for serving as investment manager to Foreign Value Small Cap Fund such that the aggregate management fee that the Manager would receive during the waiver period for serving as the investment manager of Foreign Value Small Cap Fund would be calculated using an annual rate of 0.90 percent of Foreign Value Small Cap Fund’s net assets. This fee waiver only may be terminated with the approval of the Trustees. The Manager does not have a right to recoup from Foreign Value Small Cap Fund amounts that it has waived under that agreement.
[2] The Manager, in its capacity as transfer agent to Pear Tree Funds, has contractually agreed until July 31, 2023 to waive such portion of the fees that it would otherwise receive for serving as transfer agent under its agreement with Pear Tree Funds such that the aggregate transfer agent fee with respect to Institutional Shares would be calculated using an annual rate of 0.04 percent of Foreign Value Small Cap Fund’s net assets attributable to Institutional Shares. This fee waiver only may be terminated with the approval of the Trustees. This fee waiver does not apply to Ordinary Shares or R6 Shares. The Manager does not have a right to recoup from Foreign Value Small Cap Fund amounts that it has waived under that agreement.