TETON WESTWOOD MIGHTY MITES FUND Equity Market Risk [Member] Small And Microcap Company Risk [Member] Industrials Risk [Member] Consumer Discretionary Risk [Member] Foreign Securities Risk [Member] Management Risk [Member] Geopolitical Risk [Member] Keeley Small Cap Fund You May Want To Invest In Fund If [Member] Information Technology Risk [Member] Financial Services Risk [Member] Sector Risk [Member] TETON Convertible Securities Fund Convertible Securities Risk [Member] Information Technology Risks [Member] Credit Risk [Member] High Yield Securities Risk [Member] Interest Rate Risk [Member] Small Cap Company Risk [Member] TETON WESTWOOD EQUITY FUND Large Cap Risk [Member] TETON WESTWOOD BALANCED FUND Prepayment Risk [Member] TETON WESTWOOD MIGHTY MITES FUND CLASS AAA TETON WESTWOOD MIGHTY MITES FUND CLASS A TETON WESTWOOD MIGHTY MITES FUND CLASS C TETON WESTWOOD MIGHTY MITES FUND Class I Keeley Small Cap Fund CLASS AAA Keeley Small Cap Fund CLASS A Keeley Small Cap Fund CLASS C Keeley Small Cap Fund Class I TETON Convertible Securities Fund CLASS AAA TETON Convertible Securities Fund CLASS A TETON Convertible Securities Fund CLASS C TETON Convertible Securities Fund Class I TETON WESTWOOD EQUITY FUND CLASS AAA TETON WESTWOOD EQUITY FUND CLASS A TETON WESTWOOD EQUITY FUND CLASS C TETON WESTWOOD EQUITY FUND Class I TETON WESTWOOD BALANCED FUND CLASS AAA TETON WESTWOOD BALANCED FUND CLASS A TETON WESTWOOD BALANCED FUND CLASS C TETON WESTWOOD BALANCED FUND Class I Russell 2000 Index Dow Jones U.S. Micro-cap Total Stock Market Index Russell 2000 Value Index ICE Bank of America Merrill Lynch U.S. Convertibles Index Standard & Poor’s 500 Index S&P 500 Index Bloomberg Barclays Government/Credit Bond Index 60% S&P 500 Index and 40% Barclays Government/Credit Bond Index