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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Central Index Key dei_EntityCentralIndexKey 0000722885
Pear Tree Polaris Foreign Value Small Cap Fund  
Risk/Return: rr_RiskReturnAbstract  
Investment Objective, Heading rr_ObjectiveHeading
Investment Objective:
Investment Objective, Primary 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 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 rr_OperatingExpensesCaption
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading rr_PortfolioTurnoverHeading
Portfolio Turnover
Portfolio Turnover 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 11 percent of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 11.00%
Expense Example, Heading rr_ExpenseExampleHeading
Example
Expense Example, Narrative 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.  The Example also assumes 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.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading rr_StrategyHeading
Principal Investment Strategies
Investment Strategy, Narrative 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, warrants, and rights derivative of or convertible into common stocks, in each case issued by small cap foreign markets issuers.  Foreign Value Small Cap Fund defines a foreign markets issuer to be an issuer 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.  Foreign Value Small Cap Fund generally will be invested in issuers in ten or more foreign countries.  Foreign Value Small Cap Fund considers a small-cap company to be a company having a market capitalization at time of purchase between $50 million to $3 billion.
 
Foreign Value Small Cap Fund's sub-adviser uses a three-step investment decision making process, with the objective to identify companies with the most undervalued streams of sustainable cash flow.  First, it employs proprietary quantitative investment technology to evaluate data, such as cash flow and interest rates, to produce a ranking of country and industry sectors.  Second, it uses traditional valuation criteria to regularly screen a database of more than 16,000 companies worldwide to identify a pool of approximately 250 or more securities with the greatest potential for undervalued streams of sustainable cash flow or assets.  Third, the sub-adviser conducts rigorous fundamental research on the pool of companies identified by the first two steps of the investment process. The sub-adviser also maintains a “watch-list” of companies which may be used if the valuation of a company held in Foreign Value Small Cap Fund's portfolio falls below established limits.
 
Foreign Value Small Cap Fund's sub-adviser may utilize options. The extent of the sub-adviser's use of options may vary over time based on the sub-adviser's assessment of market conditions and other factors.  Foreign Value Small Cap Fund may also buy and sell forward foreign currency exchange contracts in connection with its investments.
 
Foreign Value Small Cap Fund may invest in other derivatives (i.e., a security or instrument whose value is determined by reference to the value or the change in value of one or more securities, currencies, indices or other financial instruments) for the purpose of hedging the value of the portfolio or to establish a position in the future.  Foreign Value Small Cap Fund also may lend its securities.  Foreign Value Small Cap Fund may hold cash, or it may manage its cash by investing in cash equivalents and money market funds.
Strategy Portfolio Concentration 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, warrants, and rights derivative of or convertible into common stocks, in each case issued by small cap foreign markets issuers.  Foreign Value Small Cap Fund defines a foreign markets issuer to be an issuer 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.  Foreign Value Small Cap Fund generally will be invested in issuers in ten or more foreign countries.  Foreign Value Small Cap Fund considers a small-cap company to be a company having a market capitalization at time of purchase between $50 million to $3 billion.
Risk, Heading rr_RiskHeading
Principal Investment Risks
Risk, Narrative 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 the stock markets, generally, weaknesses 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 Investing.  Foreign Value Small Cap Fund's investments in 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.  These risks are especially acute for emerging markets securities.
 
Value Stock Investing.  A value investment style periodically comes into and falls out of favor with investors.  Value stocks generally carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.
 
Small-Capitalization Securities.  Investments in small-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.  Foreign Value Small Cap Fund may not be able to sell some or all of its securities at desired prices or may be unable to sell the securities at all.
 
Active Management Risk.  The sub-adviser's judgments about the attractiveness, value, or potential appreciation of Foreign Value Small Cap Fund's investments may prove to be incorrect.
 
Non-Diversification.  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.  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 may have significant investments in one or more specific industry sectors, subjecting it to risks greater than general market risk.
 
Securities Lending.  Securities lending involves two primary risks: investment risk and borrower default risk. Investment risk is the risk that Foreign Value Small Cap Fund will lose money from the investment of the cash collateral received from the borrower. Borrower default risk is the risk that Foreign Value Small Cap Fund will lose money due to the failure of a borrower to return a borrowed security in a timely manner.
 
Derivatives. Foreign Value Small Cap Fund's investments in currency futures, 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.
 
Please refer to “Fund Objectives, Strategies and Risks” in the Prospectus for further details.
Risk, Lose Money rr_RiskLoseMoney
It is possible to lose money by investing in Foreign Value Small Cap Fund.
Risk, Nondiversified Status rr_RiskNondiversifiedStatus
Non-Diversification.  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.  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 Depository Institution rr_RiskNotInsuredDepositoryInstitution
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
Performance
Performance, Narrative rr_PerformanceNarrativeTextBlock
The following bar charts and tables indicate some 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. Of course, 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.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns
The following bar charts and tables indicate some 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 Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex
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.
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress
www.peartreefunds.com
Performance Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture
Of course, 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
Annual Return Ordinary Shares (Calendar year ended December 31)
Bar Chart, Closing rr_BarChartClosingTextBlock
Returns for Institutional Shares will differ from the Ordinary Share returns due to differences in expenses between the classes. 
 
Calendar year-to-date return of the Ordinary Shares of Foreign Value Small Cap Fund as of 6/30/2015 is 9.18%.
 
Best Quarter:
Q2 2009
  53.73 %
Worst Quarter:
Q4 2008
  (28.49 )%
Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2015
Year to Date Return rr_BarChartYearToDateReturn 9.18%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel
Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 53.73%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel
Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (28.49%)
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 rr_PerformanceTableOneClassOfAfterTaxShown
After-tax returns are shown only for Ordinary Shares and after-tax returns for Institutional Shares may vary.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher
Actual after-tax returns may differ depending on your individual circumstances.
Performance Table, Closing 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.  Actual after-tax returns may differ depending on your individual circumstances and may differ from those shown.  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 may vary.  Actual after-tax returns may differ depending on your individual circumstances.
Pear Tree Polaris Foreign Value Small Cap Fund | MSCI ACWI  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes
reflects no deduction for fees, expenses or taxes
1 Year rr_AverageAnnualReturnYear01 (3.69%)
5 Years rr_AverageAnnualReturnYear05 7.17%
Since Inception rr_AverageAnnualReturnSinceInception 3.08%
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 0.31%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.57%
1 Year rr_ExpenseExampleYear01 $ 159
3 Years rr_ExpenseExampleYear03 494
5 Years rr_ExpenseExampleYear05 853
10 Years rr_ExpenseExampleYear10 $ 1,863
Annual Return 2009 rr_AnnualReturn2009 83.13%
Annual Return 2010 rr_AnnualReturn2010 20.70%
Annual Return 2011 rr_AnnualReturn2011 (20.02%)
Annual Return 2012 rr_AnnualReturn2012 27.11%
Annual Return 2013 rr_AnnualReturn2013 24.95%
Annual Return 2014 rr_AnnualReturn2014 6.54%
1 Year rr_AverageAnnualReturnYear01 6.54%
5 Years rr_AverageAnnualReturnYear05 10.31%
Since Inception rr_AverageAnnualReturnSinceInception 7.21%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2008
Pear Tree Polaris Foreign Value Small Cap Fund | Ordinary Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.39%
5 Years rr_AverageAnnualReturnYear05 9.75%
Since Inception rr_AverageAnnualReturnSinceInception 6.76%
Pear Tree Polaris Foreign Value Small Cap Fund | Ordinary Shares | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.08%
5 Years rr_AverageAnnualReturnYear05 8.38%
Since Inception rr_AverageAnnualReturnSinceInception 5.85%
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 0.31%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32%
1 Year rr_ExpenseExampleYear01 $ 134
3 Years rr_ExpenseExampleYear03 417
5 Years rr_ExpenseExampleYear05 721
10 Years rr_ExpenseExampleYear10 $ 1,586
1 Year rr_AverageAnnualReturnYear01 6.85%
5 Years rr_AverageAnnualReturnYear05 10.59%
Since Inception rr_AverageAnnualReturnSinceInception 7.46%