2.4.0.8040 - Disclosure - NOTE 3 - LOANS - (Table 6) (Detail)truefalseIn Thousands, unless otherwise specifiedfalse1false USDtruefalse$Context_3ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_CommercialLoansMemberhttp://www.sec.gov/CIK0000353191duration2012-04-01T00:00:002012-06-30T00:00:00falsefalseCommercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_CommercialLoansMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDtruefalse$Context_6ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_CommercialLoansMemberhttp://www.sec.gov/CIK0000353191duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCommercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_CommercialLoansMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$Context_6ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_CommercialLoansMemberhttp://www.sec.gov/CIK0000353191duration2012-01-01T00:00:002012-06-30T00:00:00falsefalseCommercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_CommercialLoansMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDtruefalse$Context_3ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_CommercialRealEstateOtherReceivableMemberhttp://www.sec.gov/CIK0000353191duration2012-04-01T00:00:002012-06-30T00:00:00falsefalseReal estate - commercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateOtherReceivableMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDtruefalse$Context_6ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_CommercialRealEstateOtherReceivableMemberhttp://www.sec.gov/CIK0000353191duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseReal estate - commercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateOtherReceivableMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6false USDtruefalse$Context_6ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_CommercialRealEstateOtherReceivableMemberhttp://www.sec.gov/CIK0000353191duration2012-01-01T00:00:002012-06-30T00:00:00falsefalseReal estate - commercialus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateOtherReceivableMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7false USDtruefalse$Context_6ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_CommercialRealEstateConstructionFinancingReceivableMemberhttp://www.sec.gov/CIK0000353191duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseReal estate constructionus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateConstructionFinancingReceivableMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8false USDtruefalse$Context_3ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_RealEstateMortgageMemberhttp://www.sec.gov/CIK0000353191duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseReal estate-mortgageus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_RealEstateMortgageMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9false USDtruefalse$Context_6ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_RealEstateMortgageMemberhttp://www.sec.gov/CIK0000353191duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseReal estate-mortgageus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_RealEstateMortgageMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10false USDtruefalse$Context_3ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_OtherLoansPortfolioSegmentMemberhttp://www.sec.gov/CIK0000353191duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseOtherus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_OtherLoansPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$11false USDtruefalse$Context_6ME__30-Jun-2013_FinancingReceivableTroubledDebtRestructuringAxis_OtherLoansPortfolioSegmentMemberhttp://www.sec.gov/CIK0000353191duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseOtherus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_OtherLoansPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$12false USDtruefalse$Context_3ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_InstallmentPortfolioSegmentMemberhttp://www.sec.gov/CIK0000353191duration2012-04-01T00:00:002012-06-30T00:00:00falsefalseInstallmentus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_InstallmentPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$13false USDtruefalse$Context_6ME__30-Jun-2012_FinancingReceivableTroubledDebtRestructuringAxis_InstallmentPortfolioSegmentMemberhttp://www.sec.gov/CIK0000353191duration2012-01-01T00:00:002012-06-30T00:00:00falsefalseInstallmentus-gaap_FinancingReceivableTroubledDebtRestructuringAxisxbrldihttp://xbrl.org/2006/xbrldinovb_InstallmentPortfolioSegmentMemberus-gaap_FinancingReceivableTroubledDebtRestructuringAxisexplicitMemberContractStandardhttp://www.novb.com/20130630Contractnovb0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 4novb_RealEstateAccruingInterestTDRNumberOfContractsnovb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11falsefalsefalse2truefalsefalse11falsefalsefalse3truefalsefalse11falsefalsefalse4truefalsefalse22falsefalsefalse5truefalsefalse11falsefalsefalse6truefalsefalse22falsefalsefalse7truefalsefalse11falsefalsefalse8truefalsefalse11falsefalsefalse9truefalsefalse11falsefalsefalse10truefalsefalse11falsefalsefalse11truefalsefalse11falsefalsefalse12truefalsefalse11falsefalsefalse13truefalsefalse22falsefalsefalsexbrli:integerItemTypeintegerNumber of contracts associated with troubled debt restructuring accruing interest.No definition available.false256Number of contracts2false 4novb_PreModificationOutstandingRecordedInvestmentnovb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse10760001076USD$falsetruefalse2truefalsefalse4500045USD$falsetruefalse3truefalsefalse10760001076USD$falsetruefalse4truefalsefalse278000278USD$falsetruefalse5truefalsefalse290000290USD$falsetruefalse6truefalsefalse278000278USD$falsetruefalse7truefalsefalse7700077USD$falsetruefalse8truefalsefalse201000201USD$falsetruefalse9truefalsefalse201000201USD$falsetruefalse10truefalsefalse4800048USD$falsetruefalse11truefalsefalse4800048USD$falsetruefalse12truefalsefalse2500025USD$falsetruefalse13truefalsefalse7300073USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructuring before the financing receivable has been modified.No definition available.false2Pre-Modification Outstanding Recorded Investment3false 4novb_PostModificationOutstandingRecordedInvestmentnovb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse10760001076USD$falsetruefalse2truefalsefalse4500045USD$falsetruefalse3truefalsefalse10760001076USD$falsetruefalse4truefalsefalse278000278USD$falsetruefalse5truefalsefalse290000290USD$falsetruefalse6truefalsefalse278000278USD$falsetruefalse7truefalsefalse7700077USD$falsetruefalse8truefalsefalse201000201USD$falsetruefalse9truefalsefalse201000201USD$falsetruefalse10truefalsefalse4800048USD$falsetruefalse11truefalsefalse4800048USD$falsetruefalse12truefalsefalse2500025USD$falsetruefalse13truefalsefalse7300073USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructuring after the financing receivable has been modified.No definition available.false2Post-Modification Outstanding Recorded InvestmentfalseNOTE 3 - LOANS - (Table 6) (Detail) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.novb.com/role/NOTE3LOANSTable6Detail133