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Risk/Return:rr_RiskReturnAbstract 
Registrant Namedei_EntityRegistrantNameStarboard Investment Trust
Prospectus Daterr_ProspectusDateNov. 04, 2011
Guardian Diversified Fund | Guardian Diversified Fund
 
Risk/Return:rr_RiskReturnAbstract 
Maximum Sales Charge (Load) Imposed On Purchases (as a % of offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice4.75%
Maximum Deferred Sales Charge (Load) (as a % of the lesser of amount purchased or redeemed)rr_MaximumDeferredSalesChargeOverOther none
Redemption Fee (as a % of amount redeemed)rr_RedemptionFeeOverRedemption none
Management Feesrr_ManagementFeesOverAssets1.00%[1]
Distribution and/or Service (12b-1) Feesrr_DistributionAndService12b1FeesOverAssets0.25%[1]
Other Expensesrr_OtherExpensesOverAssets0.97%[1]
Acquired Fund Fees and Expensesrr_AcquiredFundFeesAndExpensesOverAssets0.05%[1]
Total Annual Fund Operating Expensesrr_ExpensesOverAssets2.27%[1]
Fee Waiver and/or Expense Limitationrr_FeeWaiverOrReimbursementOverAssets0.32%[1],[2]
Net Annual Fund Operating Expensesrr_NetExpensesOverAssets1.95%[1]
1 Yearrr_ExpenseExampleYear01 664
3 Yearsrr_ExpenseExampleYear031,121
Guardian Diversified Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeading
Objective [Heading]rr_ObjectiveHeading
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlock
Expense [Heading]rr_ExpenseHeading
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlock
Shareholder Fees Caption [Text]rr_ShareholderFeesCaption
Operating Expenses Caption [Text]rr_OperatingExpensesCaption
Fee Waiver or Reimbursement over Assets, Date of Terminationrr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationJanuary 1, 2013
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeading
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlock
Expense Breakpoint Discounts [Text]rr_ExpenseBreakpointDiscountsYou may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.
Expense Breakpoint, Minimum Investment Required [Amount]rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 50,000
Other Expenses, New Fund, Based on Estimates [Text]rr_OtherExpensesNewFundBasedOnEstimatesSince the Fund is newly organized, "Other Expenses" are based on estimated expenses for the current fiscal year
Expense Example [Heading]rr_ExpenseExampleHeading
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlock
Strategy [Heading]rr_StrategyHeading
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock
Risk [Heading]rr_RiskHeading
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock
Risk Lose Money [Text]rr_RiskLoseMoneyThe loss of your money is a principal risk of investing in the Fund.
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeading
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlock
Performance One Year or Less [Text]rr_PerformanceOneYearOrLessPerformance information will be available after a full calendar year of operations.
[1]Since the Fund is newly organized, "Other Expenses" are based on estimated expenses for the current fiscal year.
[2]The Advisor has entered into an Expense Limitation Agreement with the Fund under which it has agreed to waive or reduce its fees and to assume other expenses of the Fund, if necessary, in an amount that limits the Fund's annual operating expenses (exclusive of interest, taxes, brokerage fees and commissions, extraordinary expenses, payments under the Rule 12b-1 distribution plan, and acquired fund fees and expenses) to not more than 1.65% of the average daily net assets of the Fund through January 1, 2013. The Expense Limitation Agreement may not be terminated prior to that date. The Advisor cannot recoup from the Fund any amounts paid by the Advisor under the Expense Limitation Agreement.