Shareholder Report, Line Graph (Details) 190990_Buffalo Flexible Allocation Fund_Investor Class_TSR Annual {Investor Class} - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
Mar. 31, 2022 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2016 |
Mar. 31, 2026 |
|
| Investor Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Buffalo Flexible Allocation Fund Investor Class | ||||||||||
| Accumulated Value | $ 22,456 | $ 21,352 | $ 17,888 | $ 18,045 | $ 14,574 | $ 10,340 | $ 12,866 | $ 11,943 | $ 11,102 | $ 10,000 | $ 25,409 |
| Russell 3000 Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | ||||||||||
| Accumulated Value | $ 30,620 | $ 28,558 | $ 22,088 | $ 24,161 | $ 21,587 | $ 13,282 | $ 14,616 | $ 13,438 | $ 11,807 | $ 10,000 | $ 36,157 |