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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 false2Bad debt expense8false 6us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivitiesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-510000-510falsefalsefalse2truefalsefalse-78000-78falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of excess tax benefit (tax deficiency) that arises when compensation cost from non-qualified equity-based compensation recognized on the entity's tax return exceeds (is less than) compensation cost from equity-based compensation recognized in financial statements. 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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Accounts receivable11false 7bv_IncreaseDecreaseInPrepaidExpenseAndOtherCurrentAssetbv_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-1766000-1766falsefalsefalse2truefalsefalse-1132000-1132falsefalsefalse3truefalsefalse-1983000-1983falsefalsefalsexbrli:monetaryItemTypemonetaryIncrease decrease in prepaid expense and other current asset.No definition available.false2Prepaid expenses and other current assets12false 7us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-432000-432falsefalsefalse2truefalsefalse-298000-298falsefalsefalse3truefalsefalse9400094falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in other noncurrent operating assets not separately disclosed in the statement of cash flows.No definition available.false2Other non-current assets13false 7us-gaap_IncreaseDecreaseInAccountsPayableus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse974000974falsefalsefalse2truefalsefalse808000808falsefalsefalse3truefalsefalse419000419falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Accounts payable14false 7bv_IncreaseDecreaseInAccruedExpensesAndOtherCurrentLiabilitiesbv_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1328300013283falsefalsefalse2truefalsefalse51760005176falsefalsefalse3truefalsefalse32840003284falsefalsefalsexbrli:monetaryItemTypemonetaryIncrease decrease in accrued expenses and other current liabilities.No definition available.false2Accrued expenses and other current liabilities15false 7us-gaap_IncreaseDecreaseInDeferredRevenueus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse86330008633falsefalsefalse2truefalsefalse1343200013432falsefalsefalse3truefalsefalse1504900015049falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period, excluding the portion taken into income, in the liability reflecting revenue yet to be earned for which cash or other forms of consideration was received or recorded as a receivable.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Deferred revenue16false 7us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilitiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-2699000-2699falsefalsefalse2truefalsefalse-234000-234falsefalsefalse3truefalsefalse4700047falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in other noncurrent operating liabilities not separately disclosed in the statement of cash flows.No definition available.false2Other liabilities, long-term17false 5us-gaap_NetCashProvidedByUsedInOperatingActivitiesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-21806000-21806falsefalsefalse2truefalsefalse-320000-320falsefalsefalse3truefalsefalse-647000-647falsefalsefalsexbrli:monetaryItemTypemonetaryThe net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. 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Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Section Appendix C -Paragraph 5 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Section Appendix C -Paragraph 5 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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