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STOCK OPTIONS (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014
Number and weighted average grant date fair values of options non-vested
Number of Options Non-vested at beginning of period	1,292,161us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Number of Options Non-vested, Granted 2014	592,000BVX_NumberOfOptionsNonvestedGranted
Number of Options Non-vested, Vested in 2014	381,369us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Number of Options Non-vested, Forfeited in 2014	(15,357)us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Number of Options Non-vested at end of period	1,487,435us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Weighted average grant date fair value, Non-vested Options at beginning of period	$ 0.98us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Weighted average grant date fair value, Non-vested Options Granted in 2014	$ 1.87us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Weighted average grant date fair value, Non-vested Options Vested in 2014	$ 1.08BVX_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Weighted average grant date fair value, Non-vested Options Forfeited in 2014	$ 2.15BVX_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresWeightedAverageGrantDateFairValue
Weighted average grant date fair value, Non-vested Options at end of period	$ 3.11us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

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Number of options nonvested granted.

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- Definition

Weighted average fair value as of the grant date of stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

No definition available.

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- Definition

The weighted average fair value as of grant date pertaining to a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average grant-date fair value of non-vested options outstanding.

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