Quarterly report pursuant to Section 13 or 15(d)

Investment in R-NAV, LLC (Details)

v2.4.1.9
Investment in R-NAV, LLC (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule of Equity Method Investments [Line Items]    
Equity in loss of R-NAV, LLC $ 262,227us-gaap_IncomeLossFromEquityMethodInvestments $ 0us-gaap_IncomeLossFromEquityMethodInvestments
R-NAV    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
 
Equity in loss of R-NAV, LLC 262,227us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
 
Commitment to provide services 500,000navb_EquityMethodInvestmentCommitmenttoProvideServices
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
 
Cost of services provided 21,000navb_EquityMethodInvestmentCostofServicesProvided
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
 
Remaining commitment to provide services $ 441,000navb_EquityMethodInvestmentRemainingCommitmenttoProvideServices
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember