Shareholder Report, Line Graph (Details) 190990_Buffalo Flexible Allocation 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 Flexible Allocation Fund Institutional Class | |||||||
| Accumulated Value | $ 436,247 | $ 414,375 | $ 346,445 | $ 349,167 | $ 281,582 | $ 199,488 | $ 250,000 | $ 494,264 |
| 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 |