S000000584 [Member] Expense Example - BARON SMALL CAP FUND |
Sep. 30, 2025
USD ($)
|
|---|---|
| BARON SMALL CAP FUND | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 134 |
| Expense Example, with Redemption, 3 Years | 418 |
| Expense Example, with Redemption, 5 Years | 723 |
| Expense Example, with Redemption, 10 Years | 1,590 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 108 |
| Expense Example, with Redemption, 3 Years | 337 |
| Expense Example, with Redemption, 5 Years | 585 |
| Expense Example, with Redemption, 10 Years | 1,294 |
| R6 Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 108 |
| Expense Example, with Redemption, 3 Years | 337 |
| Expense Example, with Redemption, 5 Years | 585 |
| Expense Example, with Redemption, 10 Years | $ 1,294 |