v3.25.4
Shareholder Report, Line Graph (Details) - USD ($)
1 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
MATTHEW 25 FUND                      
Account Value [Line Items]                      
Accumulated Value $ 35,998 $ 30,390 $ 23,857 $ 17,485 $ 25,007 $ 20,452 $ 18,115 $ 12,745 $ 15,825 $ 12,692 $ 10,000
S P 500 Index [Member]                      
Account Value [Line Items]                      
Accumulated Value $ 39,831 $ 33,790 $ 27,028 $ 21,402 $ 26,135 $ 20,306 $ 17,150 $ 13,042 $ 13,640 $ 11,196 $ 10,000