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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash flows from operating activities |  |  |
Net Income (loss) | $ (17,282)us-gaap_NetIncomeLoss | $ (4,339)us-gaap_NetIncomeLoss | $ 617 us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 731 us-gaap_DepreciationDepletionAndAmortization | 739 us-gaap_DepreciationDepletionAndAmortization | 742 us-gaap_DepreciationDepletionAndAmortization
Amortization of intangible assets | 145 us-gaap_DepreciationAndAmortization | 88 us-gaap_DepreciationAndAmortization | 115 us-gaap_DepreciationAndAmortization
Provision for inventory obsolescence | 733 us-gaap_InventoryWriteDown | 12 us-gaap_InventoryWriteDown | (93)us-gaap_InventoryWriteDown
Gain (loss) on disposal of property and equipment, net | 14 us-gaap_GainLossOnDispositionOfAssets | 16 us-gaap_GainLossOnDispositionOfAssets | (41)us-gaap_GainLossOnDispositionOfAssets
Stock-based compensation | 388 us-gaap_ShareBasedCompensation | 506 us-gaap_ShareBasedCompensation | 161 us-gaap_ShareBasedCompensation
Non cash other income - warrants | 7,285 us-gaap_OtherNoncashIncome | 884 us-gaap_OtherNoncashIncome | (20)us-gaap_OtherNoncashIncome
Benefit (provision) for deferred income taxes | 3,975 us-gaap_OtherNoncashIncomeTaxExpense | (1,613)us-gaap_OtherNoncashIncomeTaxExpense | 210 us-gaap_OtherNoncashIncomeTaxExpense
Changes in current assets and liabilities: |  |  |
Trade receivables | (3)us-gaap_IncreaseDecreaseInAccountsReceivable | 884 us-gaap_IncreaseDecreaseInAccountsReceivable | (658)us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses | (259)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 406 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (241)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Inventories | 1,955 us-gaap_IncreaseDecreaseInInventories | (884)us-gaap_IncreaseDecreaseInInventories | 287 us-gaap_IncreaseDecreaseInInventories
Deposits and other assets | 952 us-gaap_IncreaseDecreaseInDeposits | (234)us-gaap_IncreaseDecreaseInDeposits | (227)us-gaap_IncreaseDecreaseInDeposits
Accounts payable | 494 us-gaap_IncreaseDecreaseInAccountsPayable | 257 us-gaap_IncreaseDecreaseInAccountsPayable | (284)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued and other liabilities | 455 us-gaap_IncreaseDecreaseInAccruedLiabilities | 742 us-gaap_IncreaseDecreaseInAccruedLiabilities | (403)us-gaap_IncreaseDecreaseInAccruedLiabilities
Net cash (used in) provided by operating activities | (417)us-gaap_NetCashProvidedByUsedInOperatingActivities | (2,536)us-gaap_NetCashProvidedByUsedInOperatingActivities | 165 us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities |  |  |
Purchases of property and equipment | (630)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (588)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (753)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities | (630)us-gaap_NetCashProvidedByUsedInInvestingActivities | (588)us-gaap_NetCashProvidedByUsedInInvestingActivities | (753)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities |  |  |
Proceeds from convertible preferred stock, options and warrants | 259 us-gaap_ProceedsFromStockOptionsExercised | 7,048 us-gaap_ProceedsFromStockOptionsExercised |
Change in restricted cash | (899)us-gaap_IncreaseDecreaseInRestrictedCash |  |
Proceeds from mortgage note payable | 3,173 us-gaap_RepaymentsOfLongTermDebt |  |
Repayment of long-term debt | (3,257)BVX_RepaymentOfIndustrialRevenueBonds | (162)BVX_RepaymentOfIndustrialRevenueBonds | (130)BVX_RepaymentOfIndustrialRevenueBonds
Repurchase of warrants | (420)us-gaap_PaymentsForRepurchaseOfWarrants |  |
Net cash provided by (used in) financing activities | (1,144)us-gaap_NetCashProvidedByUsedInFinancingActivities | 6,886 us-gaap_NetCashProvidedByUsedInFinancingActivities | (130)us-gaap_NetCashProvidedByUsedInFinancingActivities
Net change in cash and cash equivalents | (2,191)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 3,762 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (718)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period | 7,924 us-gaap_CashAndCashEquivalentsAtCarryingValue | 4,162 us-gaap_CashAndCashEquivalentsAtCarryingValue | 4,880 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | 5,733 us-gaap_CashAndCashEquivalentsAtCarryingValue | 7,924 us-gaap_CashAndCashEquivalentsAtCarryingValue | 4,162 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash paid for: |  |  |
Interest paid, net | 151 us-gaap_InterestPaid | 195 us-gaap_InterestPaid | 232 us-gaap_InterestPaid
Income taxes |  |  |

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- Definition The aggregate amount paid by the entity to reacquire the right to purchase equity shares at a predetermined price, usually issued together with corporate debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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