Toews Tactical Income Fund Allocation Risk [Member] Belowinvestment Grade Securities Risk [Member] Credit Default Swap Risk [Member] Credit Risk [Member] Derivatives Risk [Member] Etf And Underlying Fund Risk [Member] Fixed Income Risk [Member] Foreign Risk [Member] Futures Risk [Member] Hedging Risk [Member] Interest Rate Risk [Member] Investmentgrade Corporate Bonds [Member] Issuer Risk [Member] Liquidity Risk [Member] Management Risk [Member] Margin Risk [Member] Market And Geopolitical Risk [Member] Options Risk [Member] Portfolio Turnover Risk [Member] Short Selling Risk [Member] Tax Inefficiency Risk [Member] Total Return Swap Risk [Member] U S Treasury Risk [Member] Toews Hedged U.S. Fund Common Stock Risk [Member] Large Cap Risk [Member] Short Sales Risk [Member] Toews Hedged Opportunity Fund Emerging Market Risk [Member] Foreign Currency Risk [Member] Small Cap And Midcap Risk [Member] Toews Unconstrained Income Fund Mortgage Backed Asset Backed And Mortgage Related Instruments Risk [Member] Preferred Stock Risk [Member] Private Placement Risks [Member] Toews Managed Risk Equity Fund Tax Inefficiency [Member] Toews Tactical Income Fund Toews Hedged U.S. Fund Toews Hedged Opportunity Fund Toews Unconstrained Income Fund Toews Managed Risk Equity Fund Morningstar US Core Bond Index (reflects no deduction for fees, expenses, or taxes) Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) S&P 500 Total Return Index (reflects no deduction for fees, expenses, or taxes) S&P 500 Total Return Index Morningstar US Small Cap Total Return Index Morningstar US Core Bond Index Bloomberg U.S. Aggregate Bond Index MSCI World Net Total Return USD Index (reflects no deduction for fees, expenses, or taxes) CBOE S&P 500 BuyWrite Index (BXM) Toews Tactical Income Fund [Default Label] Toews Hedged U.S. Fund [Default Label] Toews Hedged Opportunity Fund [Default Label] Toews Unconstrained Income Fund [Default Label] Toews Managed Risk Equity Fund [Default Label]