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CONVERTIBLE PREFERRED STOCK AND WARRANTS (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Beginning Balance	$ 5,749us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
Issuances
Effect of change in exercise price	(421)BVX_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationEffectOfChangeInExercisePrice
Change in fair value	7,285us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease
Ending Balance	12,613us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
2013 Investor Warrants [Member]
Beginning Balance	4,599us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenInvestorWarrantsMember
Issuances
Effect of change in exercise price
Change in fair value	5,947us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenInvestorWarrantsMember
Ending Balance	10,546us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenInvestorWarrantsMember
2013 Placement Agent Warrants [Member]
Beginning Balance	460us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenAgentWarrantsMember
Issuances
Effect of change in exercise price
Change in fair value	538us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenAgentWarrantsMember
Ending Balance	998us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandThirteenAgentWarrantsMember
2010 Investor Warrants [Member]
Beginning Balance	689us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenInvestorWarrantsMember
Issuances
Effect of change in exercise price	(421)BVX_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationEffectOfChangeInExercisePrice / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenInvestorWarrantsMember
Change in fair value	797us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenInvestorWarrantsMember
Ending Balance	1,065us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenInvestorWarrantsMember
2010 Placement Agent Warrants [Member]
Beginning Balance	1us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenPlacementAgentWarrantsMember
Issuances
Effect of change in exercise price
Change in fair value	3us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenPlacementAgentWarrantsMember
Ending Balance	$ 4us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs / us-gaap_DerivativeInstrumentRiskAxis = BVX_TwoThousandTenPlacementAgentWarrantsMember

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- Definition

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+ References

No definition available.

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- Definition

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258



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