v3.25.2
Form N-1A Cover
Aug. 01, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name FORUM FUNDS
Entity Central Index Key 0000315774
Entity Investment Company Type N-1A
Document Period End Date Aug. 01, 2025
Prospectus Date Aug. 01, 2025