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OTHER SUBSEQUENT EVENT (Details) (Subsequent Event [Member], USD $)	Mar. 14, 2013
Subsequent Event [Line Items]
Employment Agreement, extension of term period	1 year
Chief Executive Officer [Member]
Subsequent Event [Line Items]
Initial base salaries provided for by Amended and Restated Employment Agreements	215,515
President and Chief Sales and Marketing Officer [Member]
Subsequent Event [Line Items]
Initial base salaries provided for by Amended and Restated Employment Agreements	305,184
Senior Vice President [Member]
Subsequent Event [Line Items]
Initial base salaries provided for by Amended and Restated Employment Agreements	204,777

X

- Definition

Annual initial base salaries due to an amended, restated employment agreement.

+ References

No definition available.

+ Details

Name:	bvx_AnnualInitialBaseSalariesAmendedRestatedEmploymentAgreement
Namespace Prefix:	bvx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Term period of the Amended and Restated Employment Agreement.

+ References

No definition available.

+ Details

Name:	bvx_EmploymentAgreementExtensionOfTermPeriod
Namespace Prefix:	bvx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration