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Reduction in Force Rollforward (Details) (USD $)
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3 Months Ended | |
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Mar. 31, 2015
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Dec. 31, 2014
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| Restructuring Reserve [Roll Forward] | ||
| Accrued separation costs, beginning of period | $ 449,351us-gaap_RestructuringReserve | |
| Accrued separation costs, end of period | 1,055,132us-gaap_RestructuringReserve | 449,351us-gaap_RestructuringReserve |
| Reduction in Force, May 2014 | ||
| Restructuring Reserve [Roll Forward] | ||
| Payments related to reduction in force |
(405,187)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = navb_ReductioninForceMay2014Member |
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| Reduction in Force, March 2015 | ||
| Restructuring Reserve [Roll Forward] | ||
| Payments related to reduction in force |
(28,630)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = navb_ReductioninForceMarch2015Member |
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| Charges incurred with reduction in force |
$ 1,039,598us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = navb_ReductioninForceMarch2015Member |
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- Definition
Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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