Shareholder Report, Line Graph (Details) 190987_Buffalo Growth - Income Fund_Institutional Class_TSR Annual {Institutional Class} - USD ($) |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
Mar. 31, 2022 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Jul. 01, 2019 |
Mar. 31, 2026 |
|
| Institutional Class | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Buffalo Growth & Income Fund Institutional Class | |||||||
| Accumulated Value | $ 504,477 | $ 470,167 | $ 368,858 | $ 384,384 | $ 338,620 | $ 219,149 | $ 250,000 | $ 553,317 |
| Russell 3000 Index [Member] | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||
| Accumulated Value | 499,505 | 465,873 | 360,323 | 394,141 | 352,149 | 216,670 | 250,000 | $ 589,843 |
| Russell 1000 Index [Member] | ||||||||
| Account Value [Line Items] | ||||||||
| Line Graph and Table Measure Name | Russell 1000 Index | |||||||
| Accumulated Value | $ 510,713 | $ 473,668 | $ 364,731 | $ 398,149 | $ 351,505 | $ 218,887 | $ 250,000 | $ 601,336 |