2.4.0.8136 - Disclosure - Commitments and Contingencies - Additional Information (Detail)truefalseIn Millions, unless otherwise specifiedfalse1false falsefalseeol_PE677256--1310-Q0014_STD_28_20130312_0http://www.sec.gov/CIK0001330421duration2013-02-13T00:00:002013-03-12T00:00:002false USDfalsefalse$eol_PE677256--1310-Q0014_STD_0_20130731_0http://www.sec.gov/CIK0001330421instant2013-07-31T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3bv_CommitmentsAndContingenciesDisclosureLineItemsbv_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments and Contingencies Disclosure [Line Items]2false 4us-gaap_LossContingencyDamagesSoughtus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0091.4falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringDescribes the form and magnitude of the award the plaintiff seeks in the legal matter, which may include an unspecified amount of money.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 false0Damages sought in shareholder derivative action3false 4us-gaap_LossContingencyAccrualCarryingValueCurrentus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse34000003.4USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 false2Sales tax liability accrual4false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$eol_PE677256--1310-Q0014_STD_0_20130731_0_711502x711169http://www.sec.gov/CIK0001330421instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseMinimumus-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Minimum5true 3bv_CommitmentsAndContingenciesDisclosureLineItemsbv_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments and Contingencies Disclosure [Line Items]6false 4us-gaap_LossContingencyEstimateOfPossibleLossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse25000002.5USD$falsefalsefalsexbrli:monetaryItemTypemonetaryReflects the estimated amount of loss from the specified contingency as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 false2Sales tax liability estimate7false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse4false USDtruefalse$eol_PE677256--1310-Q0014_STD_0_20130731_0_711502x716112http://www.sec.gov/CIK0001330421instant2013-07-31T00:00:000001-01-01T00:00:00falsefalseMaximumus-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Maximum8true 3bv_CommitmentsAndContingenciesDisclosureLineItemsbv_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments and Contingencies Disclosure [Line Items]9false 4us-gaap_LossContingencyEstimateOfPossibleLossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse40000004.0USD$falsetruefalsexbrli:monetaryItemTypemonetaryReflects the estimated amount of loss from the specified contingency as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 false2Sales tax liability estimatefalseCommitments and Contingencies - Additional Information (Detail) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.bazaarvoice.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation29