v3.26.1
Shareholder Report, Line Graph (Details) - USD ($)
 6 Months Ended 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Jun. 30, 2016
Jun. 30, 2026
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2026
C000030126                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FAM Value Fund - Investor Shares                    
Accumulated Value $ 10,000   $ 11,568 $ 12,912 $ 14,517 $ 13,864 $ 19,325 $ 16,716 $ 19,410 $ 22,226 $ 25,415 $ 27,494
C000164665                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FAM Value Fund - Institutional Shares                    
Accumulated Value 500,000   578,875 647,274 728,999 697,626 974,110 844,281 982,172 1,126,707 1,290,885 1,398,798
C000030128                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FAM Dividend Focus Fund - Investor Shares                    
Accumulated Value 10,000   11,696 13,004 15,558 15,246 21,449 18,722 22,799 26,423 28,411 27,668
C000110096                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FAM Small Cap Fund - Investor Shares                    
Accumulated Value 10,000   11,585 12,781 12,693 11,710 18,046 16,473 18,974 20,537 22,450 20,141
C000164667                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   FAM Small Cap Fund - Institutional Shares                    
Accumulated Value 500,000   580,135 640,944 637,230 588,500 907,501 829,378 956,532 1,036,171 1,133,700 1,017,723
S&P 500 Index TR                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index TR                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 500,000   589,481 674,213 744,449 800,320 1,126,804 1,007,185 1,204,533 1,500,319 1,727,822 2,113,559
S&P 500 Index TR                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index TR                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index TR                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 500,000   589,481 674,213 744,449 800,320 1,126,804 1,007,185 1,204,533 1,500,319 1,727,822 2,113,559
Russell Midcap Total Return                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   11,648 13,084 14,108 13,792 20,660 17,087 19,637 22,165 25,536 31,060
Russell Midcap Total Return                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 500,000   582,419 654,207 705,400 689,600 1,033,012 854,340 981,846 1,108,263 1,276,779 1,552,996
Russell Midcap Total Return                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   11,648 13,084 14,108 13,792 20,660 17,087 19,637 22,165 25,536 31,060
Russell 2000 Total Return                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value 10,000   12,460 14,649 14,164 13,226 21,429 16,029 18,002 19,812 21,334 30,034
Russell 2000 Total Return                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 2000<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index                    
Accumulated Value $ 500,000   $ 623,004 $ 732,440 $ 708,201 $ 661,282 $ 1,071,446 $ 801,469 $ 900,103 $ 990,619 $ 1,066,711 $ 1,501,703