Shareholder Report, Average Annual Return (Details) 190988_Buffalo International Fund_Institutional Class_TSR Annual {Institutional Class} |
12 Months Ended | 60 Months Ended | 81 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
|
| Institutional Class | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Buffalo International Fund Institutional Class | ||
| Average Annual Return, Percent | 9.34% | 3.95% | 7.10% |
| FTSE Global All Cap ex US Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | FTSE Global All Cap ex US Index | ||
| Average Annual Return, Percent | 25.86% | 7.45% | 8.87% |
| FTSE All-World ex US Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | FTSE All-World ex US Index | ||
| Average Annual Return, Percent | 25.56% | 7.63% | 8.97% |