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Income Taxes (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Operating Loss Carryforwards [Line Items] | |||
| Deferred tax assets before valuation allowance | $ 63,203,600us-gaap_DeferredTaxAssetsGross | $ 49,205,121us-gaap_DeferredTaxAssetsGross | |
| R&D credit carryforwards | 8,394,408us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 7,388,463us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | |
| Loss from Cardiosonix | 15,000navb_NetIncomeLossFromSubsidiary | 13,000navb_NetIncomeLossFromSubsidiary | 14,000navb_NetIncomeLossFromSubsidiary |
| Net operating loss carryforwards in Israel | 7,600,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 7,600,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | |
| Domestic Tax Authority [Member] | |||
| Operating Loss Carryforwards [Line Items] | |||
| Net operating loss carryforwards |
153,105,438us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
118,500,000us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
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| Operating loss carryforwards due to stock-based compensation tax deductions in excess of book compensation expense |
15,300,000navb_OperatingLossCarryforwardsStockBasedCompensation / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
15,200,000navb_OperatingLossCarryforwardsStockBasedCompensation / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
|
| R&D credit carryforwards |
8,036,715us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
7,388,463us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
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| Net operating loss carryforwards expired |
20,800,000navb_NetOperatingLossCarryforwardsExpiredInPeriod / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
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| Net tax credit carryforwards expired |
$ 1,100,000navb_NetTaxCreditCarryforwardsExpiredInPeriod / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |
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- Definition
Net Income Loss From Subsidiary No definition available.
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- Definition
Represents the amount of net operating loss carryforwards that have expired during the reporting period. No definition available.
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- Definition
Represents the amount of net tax credit carryforwards that expired during the reporting period. No definition available.
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- Definition
Operating Loss Carryforwards Stock Based Compensation No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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