v3.25.3
S000004424 [Member] Investment Objectives and Goals - Ultra-Small Company Market Fund
Jun. 30, 2025
Prospectus [Line Items]  
Risk/Return [Heading] FUND SUMMARY: ULTRA-SMALL COMPANY MARKET FUND
Objective [Heading] Investment Objective:
Objective, Primary [Text Block]
The Ultra-Small Company Market Fund (the “Fund”) seeks to provide a long-term total return on capital, primarily through capital appreciation.