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

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