Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2015	Jun. 17, 2015	Oct. 31, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	BV
Entity Registrant Name	Bazaarvoice Inc
Entity Central Index Key	0001330421
Current Fiscal Year End Date	--04-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		80,230,018
Entity Public Float			$ 448