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CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements Of Operations
Sales	$ 6,128us-gaap_SalesRevenueNet	$ 6,482us-gaap_SalesRevenueNet
Cost of sales	3,454us-gaap_CostOfGoodsAndServicesSold	3,726us-gaap_CostOfGoodsAndServicesSold
Gross profit	2,674us-gaap_GrossProfit	2,756us-gaap_GrossProfit
Other costs and expenses:
Research and development	446us-gaap_ResearchAndDevelopmentExpense	332us-gaap_ResearchAndDevelopmentExpense
Professional services	331us-gaap_ProfessionalFees	258us-gaap_ProfessionalFees
Salaries and related costs	1,952us-gaap_SalariesAndWages	907us-gaap_SalariesAndWages
Selling, general and administrative	2,217us-gaap_SellingGeneralAndAdministrativeExpense	1,201us-gaap_SellingGeneralAndAdministrativeExpense
Total other costs and expenses	4,946us-gaap_OtherCostAndExpenseOperating	2,698us-gaap_OtherCostAndExpenseOperating
Income/(loss) from operations	(2,272)us-gaap_OperatingIncomeLoss	58us-gaap_OperatingIncomeLoss
Interest expense, net	(40)us-gaap_InterestIncomeExpenseNet	(28)us-gaap_InterestIncomeExpenseNet
Change in fair value of liabilities, net	1,444us-gaap_UnrealizedGainLossOnDerivatives	(9,599)us-gaap_UnrealizedGainLossOnDerivatives
Total other (expense), net	1,404us-gaap_OtherNonoperatingExpense	(9,627)us-gaap_OtherNonoperatingExpense
Loss before income taxes	(868)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	(9,569)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Provision for income taxes, net	(8)us-gaap_IncomeTaxExpenseBenefit	(38)us-gaap_IncomeTaxExpenseBenefit
Net loss	(876)us-gaap_NetIncomeLoss	(9,607)us-gaap_NetIncomeLoss
Accretion on convertible preferred stock	(222)BVX_AccretionOnConvertiblePreferredStock	(204)BVX_AccretionOnConvertiblePreferredStock
Deemed dividend on conversion of warrants and Series A preferred stock to Series B convertible preferred stock	13,956BVX_DeemedDividendOnBeneficialConversionFeature	0BVX_DeemedDividendOnBeneficialConversionFeature
Net income (loss) attributable to common shareholders	$ 12,858us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ (9,811)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Income (loss) per share
Basic	$ 0.69us-gaap_EarningsPerShareBasic	$ (0.55)us-gaap_EarningsPerShareBasic
Diluted	$ 0.57us-gaap_EarningsPerShareDiluted	$ (0.55)us-gaap_EarningsPerShareDiluted
Weighted average number of shares outstanding- basic	18,615us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	17,684us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average number of shares outstanding - dilutive	20,470us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	17,684us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

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