v3.25.4
S000000585 [Member] Investment Objectives and Goals - BARON OPPORTUNITY FUND
Sep. 30, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Baron Opportunity Fund
Objective [Heading] Investment Goal
Objective, Primary [Text Block]
The investment goal of Baron Opportunity Fund® (the “Fund”) is capital appreciation through investments primarily in growth companies that benefit from technology advances.