Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	TETON WESTWOOD FUNDS
Prospectus Date	rr_ProspectusDate	Jan. 28, 2020
TETON WESTWOOD MIGHTY MITES FUND
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	TETON WESTWOOD MIGHTY MITESSM FUND (the "Mighty Mites Fund")
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Mighty Mites Fund seeks to provide long term capital appreciation by investing primarily in micro-capitalization equity securities.
Expense [Heading]	rr_ExpenseHeading	Fees and Expenses of the Mighty Mites 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 Mighty Mites Fund. You may qualify for sales charge discounts if you or your family invest, or agree to invest in the future, at least $100,000 in the Mighty Mites Fund’s Class A shares. More information about these and other discounts is available from your financial professional and in the section entitled, “Classes of Shares” of the Mighty Mites Fund’s statutory prospectus, in Appendix A, “Sales Charge Reductions and Waivers Available through Certain Intermediaries,” attached to the statutory prospectus, and in the section entitled, “Purchase and Redemption of Shares” of the Mighty Mites Fund’s Statement of Additional Information (“SAI”).
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):
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Mighty Mites 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 the Mighty Mites Fund’s shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Mighty Mites Fund’s performance. During the most recent fiscal year, the Mighty Mites Fund’s portfolio turnover rate was 8% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	8.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you or your family invest, or agree to invest in the future, at least $100,000 in the Mighty Mites Fund’s Class A shares. More information about these and other discounts is available from your financial professional and in the section entitled, “Classes of Shares” of the Mighty Mites Fund’s statutory prospectus, in Appendix A, “Sales Charge Reductions and Waivers Available through Certain Intermediaries,” attached to the statutory prospectus, and in the section entitled, “Purchase and Redemption of Shares” of the Mighty Mites Fund’s Statement of Additional Information (“SAI”).
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 100,000
Expense Example [Heading]	rr_ExpenseExampleHeading	Expense Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the Mighty Mites Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Mighty Mites 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 Mighty Mites Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	You would pay the following expenses if you did not redeem your shares of the Mighty Mites Fund:
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Mighty Mites Fund primarily invests in common stocks of smaller companies that have a market capitalization (defined as shares outstanding times current market price) of $500 million or less at the time of the Mighty Mites Fund’s initial investment. The Mighty Mites Fund focuses on micro-cap companies which appear to be underpriced relative to their “private market value.” Private market value is the value which Gabelli Funds, LLC, the Mighty Mites Fund’s sub-adviser (the “Gabelli Sub-Adviser”), believes informed investors would be willing to pay to acquire a company. The Gabelli Sub-Adviser has disciplines in place that serve as sell signals such as a security reaching a predetermined price target, a change to a company’s fundamentals that make the risk/reward profile unattractive, or a need to improve the overall risk/reward profile of the Fund. Micro-cap companies may also be new or unseasoned companies which are in their very early stages of development. Micro-cap companies can also be engaged in new and emerging industries. Micro-cap companies are generally not well-known to investors and have less of an investor following than larger companies. The Gabelli Sub-Adviser will attempt to capitalize on the lack of analyst attention to micro-cap stocks and the inefficiency of the micro-cap market. The Mighty Mites Fund may also invest up to 25% of its total assets in foreign securities and in European Depositary Receipts (“EDRs”) or American Depositary Receipts (“ADRs”), including in those of companies located in emerging markets. The Mighty Mites Fund may also invest in foreign debt securities.
Risk [Heading]	rr_RiskHeading	Principal Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	You may want to invest in the Fund if: you are a long term investor you seek long term growth of capital you seek an exposure to the micro-cap market segment despite the potential volatility of micro-capitalization stocks The Mighty Mites Fund’s share price will fluctuate with changes in the market value of the Mighty Mites Fund’s portfolio securities. An investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell Mighty Mites Fund shares, they may be worth more or less than what you paid for them. Investing in the Mighty Mites Fund involves the following risks: Equity Market Risk.    The price of equity securities may rise or fall because of changes in the broad market or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Mighty Mites Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. When the value of the Mighty Mites Fund’s securities goes down, your investment in the Mighty Mites Fund decreases in value. Foreign Securities Risk.    Investments in foreign securities involve risks relating to political, social, and economic developments abroad, as well as risks resulting from the differences between the regulations to which U.S. and foreign issuers and markets are subject. These risks include expropriation, differing accounting and disclosure standards, currency exchange risks, settlement difficulties, market illiquidity, difficulties enforcing legal rights, and greater transaction costs. These risks are more pronounced in the securities of companies located in emerging markets. Management Risk.    If the portfolio managers are incorrect in their assessment of the growth prospects of the securities the Mighty Mites Fund holds, then the value of the Mighty Mites Fund’s shares may decline. Small- and Micro-Cap Company Risk.    Although small-cap and micro-cap companies may offer greater potential for capital appreciation than larger companies, investing in securities of small-cap and micro-cap companies may involve greater risks than investing in larger, more established issuers. Small-cap and micro-cap companies generally have limited product lines, markets, and financial resources. Their securities may trade less frequently and in more limited volume than the securities of larger, more established companies. Also, small-cap and micro-cap companies are typically subject to greater changes in earnings and business prospects than larger companies. Consequently, small-cap and micro-cap company stock prices tend to rise and fall in value more than other stocks. The risks of investing in micro-cap stocks and companies are even greater than those of investing in small-cap companies.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the Fund is not a deposit of the 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 [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and table that follow provide an indication of the risks of investing in the Mighty Mites Fund by showing changes in the Mighty Mites Fund’s performance from year to year, and by showing how the Mighty Mites Fund’s average annual returns for one year, five years, and ten years compared with those of a broad based securities market index as well as another relevant index. As with all mutual funds, the Mighty Mites Fund’s past performance (before and after taxes) does not predict how the Mighty Mites Fund will perform in the future. Updated information on the Mighty Mites Fund’s results can be obtained by visiting www.gabelli.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The bar chart and table that follow provide an indication of the risks of investing in the Mighty Mites Fund by showing changes in the Mighty Mites Fund’s performance from year to year, and by showing how the Mighty Mites Fund’s average annual returns for one year, five years, and ten years compared with those of a broad based securities market index as well as another relevant index.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.gabelli.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	As with all mutual funds, the Mighty Mites Fund’s past performance (before and after taxes) does not predict how the Mighty Mites Fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	TETON WESTWOOD MIGHTY MITES FUND (Total returns for Class AAA Shares for the Years Ended December 31)
Bar Chart Narrative [Text Block]	rr_BarChartNarrativeTextBlock
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the calendar years shown in the bar chart, the highest return for a quarter was 12.89% (quarter ended December 31, 2010) and the lowest return for a quarter was (16.17)% (quarter ended December 31, 2018).
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for the years ended December 31, 2019, with maximum sales charge, if applicable)
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. After-tax returns shown are not relevant to investors who hold their Mighty Mites Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts, including Roth IRAs and SEP IRAs (collectively, “IRAs”).
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	In some instances, the “Return After Taxes on Distributions and Sale of Fund Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss from the sale of Mighty Mites Fund shares to offset other taxable gains.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The returns shown for Class I shares prior to its actual inception date are those of the Class A shares of the Mighty Mites Fund. All classes of the Mighty Mites Fund would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the classes do not have the same expenses. 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. In some instances, the "Return After Taxes on Distributions and Sale of Fund Shares" may be greater than "Return Before Taxes" because the investor is assumed to be able to use the capital loss from the sale of Mighty Mites Fund shares to offset other taxable gains. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Mighty Mites Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts, including Roth IRAs and SEP IRAs (collectively, "IRAs").
TETON WESTWOOD MIGHTY MITES FUND | Class AAA Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of redemption or offering price, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fees	rr_RedemptionFeeOverRedemption	2.00%	[1]
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	1.00%
Distribution and Service (Rule 12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.16%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.43%
1 Year	rr_ExpenseExampleYear01	$ 146
3 Years	rr_ExpenseExampleYear03	452
5 Years	rr_ExpenseExampleYear05	782
10 Years	rr_ExpenseExampleYear10	1,713
1 Year	rr_ExpenseExampleNoRedemptionYear01	146
3 Years	rr_ExpenseExampleNoRedemptionYear03	452
5 Years	rr_ExpenseExampleNoRedemptionYear05	782
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,713
2010	rr_AnnualReturn2010	28.12%
2011	rr_AnnualReturn2011	(5.80%)
2012	rr_AnnualReturn2012	18.22%
2013	rr_AnnualReturn2013	40.56%
2014	rr_AnnualReturn2014	0.81%
2015	rr_AnnualReturn2015	(6.27%)
2016	rr_AnnualReturn2016	22.08%
2017	rr_AnnualReturn2017	15.37%
2018	rr_AnnualReturn2018	(13.75%)
2019	rr_AnnualReturn2019	16.93%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2010
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	12.89%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2018
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(16.17%)
Past One Year	rr_AverageAnnualReturnYear01	16.93%
Past Five Years	rr_AverageAnnualReturnYear05	5.89%
Past Ten Years	rr_AverageAnnualReturnYear10	10.41%
TETON WESTWOOD MIGHTY MITES FUND | Class A Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.00%
Maximum Deferred Sales Charge (Load) (as a percentage of redemption or offering price, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fees	rr_RedemptionFeeOverRedemption	2.00%	[1]
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	1.00%
Distribution and Service (Rule 12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses	rr_OtherExpensesOverAssets	0.16%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.68%
1 Year	rr_ExpenseExampleYear01	$ 564
3 Years	rr_ExpenseExampleYear03	908
5 Years	rr_ExpenseExampleYear05	1,276
10 Years	rr_ExpenseExampleYear10	2,308
1 Year	rr_ExpenseExampleNoRedemptionYear01	564
3 Years	rr_ExpenseExampleNoRedemptionYear03	908
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,276
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,308
Past One Year	rr_AverageAnnualReturnYear01	12.00%
Past Five Years	rr_AverageAnnualReturnYear05	4.77%
Past Ten Years	rr_AverageAnnualReturnYear10	9.68%
TETON WESTWOOD MIGHTY MITES FUND | Class C Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of redemption or offering price, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fees	rr_RedemptionFeeOverRedemption	2.00%	[1]
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	1.00%
Distribution and Service (Rule 12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.16%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.18%
1 Year	rr_ExpenseExampleYear01	$ 321
3 Years	rr_ExpenseExampleYear03	682
5 Years	rr_ExpenseExampleYear05	1,169
10 Years	rr_ExpenseExampleYear10	2,513
1 Year	rr_ExpenseExampleNoRedemptionYear01	221
3 Years	rr_ExpenseExampleNoRedemptionYear03	682
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,169
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,513
Past One Year	rr_AverageAnnualReturnYear01	15.07%
Past Five Years	rr_AverageAnnualReturnYear05	5.09%
Past Ten Years	rr_AverageAnnualReturnYear10	9.58%
TETON WESTWOOD MIGHTY MITES FUND | Class I Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of redemption or offering price, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fees	rr_RedemptionFeeOverRedemption	2.00%	[1]
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	1.00%
Distribution and Service (Rule 12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.16%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.02%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.18%
1 Year	rr_ExpenseExampleYear01	$ 120
3 Years	rr_ExpenseExampleYear03	375
5 Years	rr_ExpenseExampleYear05	649
10 Years	rr_ExpenseExampleYear10	1,432
1 Year	rr_ExpenseExampleNoRedemptionYear01	120
3 Years	rr_ExpenseExampleNoRedemptionYear03	375
5 Years	rr_ExpenseExampleNoRedemptionYear05	649
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,432
Past One Year	rr_AverageAnnualReturnYear01	17.21%
Past Five Years	rr_AverageAnnualReturnYear05	6.15%
Past Ten Years	rr_AverageAnnualReturnYear10	10.68%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 11, 2008
TETON WESTWOOD MIGHTY MITES FUND | Return After Taxes on Distributions | Class AAA Shares
Risk/Return:	rr_RiskReturnAbstract
Past One Year	rr_AverageAnnualReturnYear01	15.81%
Past Five Years	rr_AverageAnnualReturnYear05	4.86%
Past Ten Years	rr_AverageAnnualReturnYear10	9.53%
TETON WESTWOOD MIGHTY MITES FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class AAA Shares
Risk/Return:	rr_RiskReturnAbstract
Past One Year	rr_AverageAnnualReturnYear01	10.80%
Past Five Years	rr_AverageAnnualReturnYear05	4.54%
Past Ten Years	rr_AverageAnnualReturnYear10	8.51%
TETON WESTWOOD MIGHTY MITES FUND | Dow Jones U.S. Micro-Cap Total Stock Market Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
Past One Year	rr_AverageAnnualReturnYear01	19.92%
Past Five Years	rr_AverageAnnualReturnYear05	5.87%
Past Ten Years	rr_AverageAnnualReturnYear10	10.58%
TETON WESTWOOD MIGHTY MITES FUND | Lipper Small Cap Value Fund Average (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
Past One Year	rr_AverageAnnualReturnYear01	21.68%
Past Five Years	rr_AverageAnnualReturnYear05	5.79%
Past Ten Years	rr_AverageAnnualReturnYear10	9.83%

[1] (as a percentage of amount redeemed for shares held 7 days or less) payable to the Fund