Document and Entity Information	0 Months Ended
Mar. 31, 2014
Risk/Return:
Document Type	485BPOS
Document Period End Date	Mar. 31, 2014
Registrant Name	BUFFALO FUNDS
Central Index Key	0001135300
Amendment Flag	false
Document Creation Date	Jul. 23, 2014
Document Effective Date	Jul. 29, 2014
Prospectus Date	Jul. 29, 2014
Buffalo Discovery Fund \| Buffalo Discovery Fund
Risk/Return:
Trading Symbol	BUFTX
Buffalo Dividend Focus Fund \| Buffalo Dividend Focus Fund
Risk/Return:
Trading Symbol	BUFDX
Buffalo Emerging Opportunities Fund \| Buffalo Emerging Opportunities Fund
Risk/Return:
Trading Symbol	BUFOX
Buffalo Flexible Income Fund \| Buffalo Flexible Income Fund
Risk/Return:
Trading Symbol	BUFBX
Buffalo Growth Fund \| Buffalo Growth Fund
Risk/Return:
Trading Symbol	BUFGX
Buffalo High Yield Fund \| Buffalo High Yield Fund
Risk/Return:
Trading Symbol	BUFHX
Buffalo International Fund \| Buffalo International Fund
Risk/Return:
Trading Symbol	BUFIX
Buffalo Large Cap Fund \| Buffalo Large Cap Fund
Risk/Return:
Trading Symbol	BUFEX
Buffalo Mid Cap Fund \| Buffalo Mid Cap Fund
Risk/Return:
Trading Symbol	BUFMX
Buffalo Small Cap Fund \| Buffalo Small Cap Fund
Risk/Return:
Trading Symbol	BUFSX

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The date the document was made available and submitted, in CCYY-MM-DD format. The date of submission, date of acceptance by the recipient, and the document effective date are all potentially different.

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The date when a document, upon receipt and acceptance, becomes officially effective, in CCYY-MM-DD format. Usually it is a system-assigned date time value, but it may be declared by the submitter in some cases.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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