Pear Tree Polaris Small Cap Fund Market, Industry and Specific Holdings [Member] Investment Strategies, Generally, and Quantitative Investment Risk [Member] Small-Capitalization Securities [Member] Growth and Value Stock Investing [Member] Foreign Securities [Member] Risks of Investing in ADRs [Member] Liquidity Risk [Member] Specific Industry, Sector Concentration, including Financial Services [Member] Investments in Other Collective Investment Funds [Member] Currency and Option Contracts and Other Derivatives [Member] Cybersecurity and Technology Risk [Member] Pear Tree Quality Fund Difficulty in Comparing Fund Performance with Target Portfolio Performance [Member] Inability to Conduct Due Diligence on Target Portfolio's Investment Adviser [Member] Potential Impact on Target Portfolio [Member] Accuracy of Target Portfolio Information [Member] Large- and Mid-Capitalization Securities [Member] Specific Industry, Sector Concentration [Member] Derivatives [Member] Pear Tree Essex Environmental Opportunities Fund Sector Concentration Risk [Member] Mid- and Small-Capitalization Securities [Member] Growth Stock Investing [Member] Active Management Risk [Member] Pear Tree Polaris Foreign Value Fund Foreign Securities, including Emerging Markets Securities [Member] Value Stock Investing [Member] Small- and Micro-Capitalization Securities [Member] Regional/Country Focus [Member] Pear Tree Polaris Foreign Value Small Cap Fund Pear Tree Polaris International Opportunities Fund Opportunistic Stock Investing [Member] Pear Tree Polaris Small Cap Fund - Ordinary Shares Pear Tree Polaris Small Cap Fund - Institutional Shares Pear Tree Polaris Small Cap Fund - R6 Shares Pear Tree Quality Fund - Ordinary Shares Pear Tree Quality Fund - Institutional Shares Pear Tree Quality Fund - R6 Shares Pear Tree Essex Environmental Opportunities Fund - Ordinary Shares Pear Tree Essex Environmental Opportunities Fund - Institutional Shares Pear Tree Essex Environmental Opportunities Fund - R6 Shares Pear Tree Polaris Foreign Value Fund - Ordinary Shares Pear Tree Polaris Foreign Value Fund - Institutional Shares Pear Tree Polaris Foreign Value Fund - R6 Shares Pear Tree Polaris Foreign Value Small Cap Fund - Ordinary Shares Pear Tree Polaris Foreign Value Small Cap Fund - Institutional Shares Pear Tree Polaris Foreign Value Small Cap Fund - R6 Shares Pear Tree Polaris International Opportunities Fund - Ordinary Shares Pear Tree Polaris International Opportunities Fund - Institutional Shares Pear Tree Polaris International Opportunities Fund - R6 Shares S&P 500 Index (reflects no deductions for fees, expenses or taxes) Russell 2000® Index (reflects no deductions for fees, expenses or taxes) MSCI World Index (reflects no deductions for fees, expenses or taxes) MSCI EAFE Index (reflects no deductions for fees, expenses or taxes) MSCI ACWI ex USA (reflects no deduction for fees, expenses or taxes) MSCI ACWI ex USA Small Cap (reflects no deduction for fees, expenses or taxes) Pear Tree Polaris Small Cap Fund Pear Tree Polaris Small Cap Fund - Ordinary Shares Pear Tree Polaris Small Cap Fund - Institutional Shares Pear Tree Polaris Small Cap Fund - R6 Shares S&P 500 Index (reflects no deductions for fees, expenses or taxes) Russell 2000® Index (reflects no deductions for fees, expenses or taxes) Pear Tree Quality Fund Pear Tree Quality Fund - Ordinary Shares Pear Tree Quality Fund - Institutional Shares Pear Tree Quality Fund - R6 Shares Pear Tree Essex Environmental Opportunities Fund Pear Tree Essex Environmental Opportunities Fund - Institutional Shares Pear Tree Essex Environmental Opportunities Fund - Ordinary Shares Pear Tree Essex Environmental Opportunities Fund - R6 Shares MSCI World Index (reflects no deductions for fees, expenses or taxes) Pear Tree Polaris Foreign Value Fund Pear Tree Polaris Foreign Value Fund - Ordinary Shares Pear Tree Polaris Foreign Value Fund - Institutional Shares Pear Tree Polaris Foreign Value Fund - R6 Shares MSCI EAFE Index (reflects no deductions for fees, expenses or taxes) Pear Tree Polaris Foreign Value Small Cap Fund Pear Tree Polaris Foreign Value Small Cap Fund - Ordinary Shares Pear Tree Polaris Foreign Value Small Cap Fund - Institutional Shares Pear Tree Polaris Foreign Value Small Cap Fund - R6 Shares MSCI ACWI ex USA (reflects no deduction for fees, expenses or taxes) MSCI ACWI ex USA Small Cap (reflects no deduction for fees, expenses or taxes) Pear Tree Polaris International Opportunities Fund Pear Tree Polaris International Opportunities Fund - Ordinary Shares Pear Tree Polaris International Opportunities Fund - Institutional Shares Pear Tree Polaris International Opportunities Fund - R6 Shares Cybersecurity and Technology Risk. Regional/Country Focus. Specific Industry, Sector Concentration. Investments in Other Collective Investment Funds. Currency and Option Contracts and Other Derivatives. Risks of Investing in ADRs. Investment Strategies, Generally, and Quantitative Investment Risk. Liquidity Risk. Small- and Micro-Capitalization Securities. Large- and Mid-Capitalization Securities. Opportunistic Stock Investing. Foreign Securities, including Emerging Markets Securities. Market, Industry and Specific Holdings. Value Stock Investing. Foreign Securities. Active Management Risk. Growth Stock Investing. Mid- and Small-Capitalization Securities. Sector Concentration Risk. Derivatives. Accuracy of Target Portfolio Information. Potential Impact on Target Portfolio. Inability to Conduct Due Diligence on Target Portfolio's Investment Adviser. Difficulty in Comparing Fund Performance with Target Portfolio Performance. Specific Industry, Sector Concentration, including Financial Services. Growth and Value Stock Investing. Small-Capitalization Securities.