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Matrix Advisors Value Fund, Inc.  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Matrix Advisors Value Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Matrix Advisors Value Fund (the “Fund”) seeks to achieve a total rate of return which is comprised of capital appreciation and current income.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
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 October 31, 2022
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 most recent fiscal year, the Fund’s portfolio turnover rate was 24% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 24.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you compare the costs of investing in 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. The expenses below reflect the Expense Cap for the first year only.
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 Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Fund invests primarily in both dividend and non-dividend paying common stocks of U.S. companies that the Advisor believes are financially strong and meet specific valuation criteria using the principles of value investing based on Classic Valuation Analysis. Using valuation models, statistics such as earnings growth, dividend growth, return on equity and book value are analyzed versus their historical, current and projected levels to determine a company’s “Intrinsic Value.” The Fund invests primarily in large capitalization companies, which the Advisor defines as companies with minimum market capitalizations of $2 billion at the time of purchase. Stocks will be sold when the Advisor believes they no longer represent value. The Fund may invest in any sector. At times, the Advisor may overweight the Fund’s portfolio in one or more particular sectors, and/or underweight the Fund’s portfolio or not invest in one or more particular sectors.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is a risk that you could lose all or a portion of your investment in the Fund. The following are some of the principal risks that can affect the value of your investment:
Management Risk. The risk that the Advisor may fail to implement the Fund’s investment strategies and meet its investment objective.
Market Risk; Recent Market Events. The Fund’s investments are subject to market risk, which may cause the value of the Fund’s investments to decline. If the value of the Fund’s investments goes down, the share price of the Fund will go down, and you may lose money. U.S. and international markets have experienced volatility in recent months and years due to a number of economic, political and global macro factors, including the impact of the coronavirus (COVID-19) global pandemic, which resulted in a public health crisis, business interruptions, growth concerns in the U.S. and overseas, travel restrictions, changed social behavior, rising inflation and reduced consumer spending. While U.S. and global economies are recovering from the effects of COVID-19, the recovery is proceeding at slower than expected rates and may last for a prolonged period of time. Continuing market volatility may have adverse effects on the Fund.

Common Stock Risk. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change.
Large Capitalization Company Risk. Larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in consumer tastes or innovative, smaller competitors. Also, large-capitalization companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion.
Sector Emphasis Risk. Investing a substantial portion of the Fund’s assets in related industries or sectors may have greater risks, because companies in these sectors may share common characteristics and may react similarly to market developments. In recent years, the Fund has concentrated its investments in the Financials sector, and as a result, it may be more susceptible to the particular risks that may affect companies in the Financials sector, including government regulations, economic conditions, credit rating downgrades, changes in interest rates and decreased liquidity in credit markets.
Value Strategy Risk. The stock of value companies can continue to be undervalued for long periods of time and not realize its expected value. The Advisor may not be able to accurately determine the “Intrinsic Value” of a company, resulting in the purchase of an overvalued security or premature sale of an undervalued company. Additionally, the market may use different criteria to determine a company’s value, which could have unexpected effects on a company’s performance and cause losses for the Fund.
Cyber Security Risk. Investment companies, such as the Fund, and their service providers may be subject to operational and information security risks resulting from cyber-attacks. Cyber-attacks include, among other behaviors, stealing or corrupting data maintained online or digitally, denial of service attacks on websites, the unauthorized release of confidential information or various other forms of cyber security breaches. Cyber-attacks may interfere with the processing of shareholder transactions, impact the Fund’s ability to calculate its net asset value (“NAV”), cause the release of private shareholder information or confidential company information, impede redemptions, subject the Fund to regulatory fines or financial losses, and cause reputational damage. The Fund may also incur additional costs for cyber security risk management purposes. Similar types of cyber security risks are also present for issuers of securities in which the Fund invests.
Risk Lose Money [Text] rr_RiskLoseMoney There is a risk that you could lose all or a portion of your investment in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The following performance information provides some indication of the risks of investing in the Fund. The bar chart below shows how the Fund’s total returns have varied from year to year. The table below shows how the Fund’s average annual total returns for 1-year, 5-year and 10-year periods compare with that of a broad-based market index. The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. Updated performance information is available on the Fund’s website at www.matrixadvisorsvaluefund.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following performance information provides some indication of the risks of investing in the Fund.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.matrixadvisorsvaluefund.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns*
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock * The Fund’s year-to-date return as of September 30, 2021 was 23.30%.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock During the periods shown in the bar chart, the Fund’s highest quarterly return was 23.90% for the quarter ended June 30, 2020, and the lowest quarterly return was -27.68% for the quarter ended March 31, 2020.
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2021
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 23.30%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.90%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (27.68%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2020)
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 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 shown are not relevant to investors who hold their Fund shares through tax-deferred or other tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts.
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 the other return figures for the same period since 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 Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are 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 shown are not relevant to investors who hold their Fund shares through tax-deferred or other tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. In certain cases, the figure representing “Return after taxes on distributions and sale of Fund shares” may be higher than the other return figures for the same period since a higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
Matrix Advisors Value Fund, Inc. | S&P 500® Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel S&P 500® Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 11.24%
5 Years rr_AverageAnnualReturnYear05 15.22%
10 Years rr_AverageAnnualReturnYear10 13.88%
Matrix Advisors Value Fund, Inc. | Matrix Advisors Value Fund, Inc.  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol MAVFX
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.46%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.21%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.22%)
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.99% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 362
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 644
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,446
Annual Return 2011 rr_AnnualReturn2011 (12.80%)
Annual Return 2012 rr_AnnualReturn2012 9.34%
Annual Return 2013 rr_AnnualReturn2013 40.93%
Annual Return 2014 rr_AnnualReturn2014 12.43%
Annual Return 2015 rr_AnnualReturn2015 (8.27%)
Annual Return 2016 rr_AnnualReturn2016 15.15%
Annual Return 2017 rr_AnnualReturn2017 14.03%
Annual Return 2018 rr_AnnualReturn2018 (11.04%)
Annual Return 2019 rr_AnnualReturn2019 28.71%
Annual Return 2020 rr_AnnualReturn2020 11.24%
Label rr_AverageAnnualReturnLabel Return before taxes
1 Year rr_AverageAnnualReturnYear01 18.40%
5 Years rr_AverageAnnualReturnYear05 10.83%
10 Years rr_AverageAnnualReturnYear10 8.77%
Matrix Advisors Value Fund, Inc. | Matrix Advisors Value Fund, Inc. | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions
1 Year rr_AverageAnnualReturnYear01 10.45%
5 Years rr_AverageAnnualReturnYear05 9.77%
10 Years rr_AverageAnnualReturnYear10 8.10%
Matrix Advisors Value Fund, Inc. | Matrix Advisors Value Fund, Inc. | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Return after taxes on distributions and sale of Fund shares
1 Year rr_AverageAnnualReturnYear01 7.20%
5 Years rr_AverageAnnualReturnYear05 8.44%
10 Years rr_AverageAnnualReturnYear10 7.06%
[1] Matrix Asset Advisors, Inc. (the “Advisor”), 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 front-end or contingent deferred loads, taxes, leverage interest, brokerage commissions, acquiring fund fees and expenses, expenses incurred in connection with any merger or reorganization, or extraordinary expenses such as litigation) do not exceed 0.99% of the Fund’s average daily net assets. The Advisor 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 at least October 31, 2022, and may be terminated at any time, and without payment or penalty, by the Fund’s Board of Directors (the “Board”) upon 60 days’ written notice to the Advisor. The agreement may not be terminated by the Advisor without the consent of the Board. Currently, the Advisor has agreed not to seek reimbursement of such management fee waivers and/or expense reimbursements.