v3.26.1
Investment Objectives and Goals
Apr. 29, 2026
Prospectus [Line Items]  
Risk/Return [Heading] FIRSTHAND TECHNOLOGY OPPORTUNITIES FUND (TEFQX)
Firsthand Technology Opportunities Fund  
Prospectus [Line Items]  
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block] Firsthand Technology Opportunities Fund seeks long-term growth of capital.
Firsthand Alternative Energy Fund  
Prospectus [Line Items]  
Objective [Heading] INVESTMENT OBJECTIVE
Objective, Primary [Text Block] Firsthand Alternative Energy Fund seeks long-term growth of capital.