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Debt - Additional Information (Details) (USD $)
3 Months Ended 0 Months Ended 1 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jan. 31, 2015
Oct. 31, 2014
Jun. 30, 2014
Jun. 30, 2014
Tranche
Feb. 28, 2010
Debt Instrument [Line Items]              
Warrants to purchase shares 71,257us-gaap_ClassOfWarrantOrRightOutstanding            
Warrant exercise price per share $ 9.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1            
Warrants fair value and financing fees $ 212,073us-gaap_DebtInstrumentUnamortizedDiscount            
Interest rate on loan 9.00%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd            
Debt Instrument, description of variable rate basis The loan bears interest equal to the greater of either 9.0%, plus the Prime Rate as reported in The Wall Street Journal, less 3.25% or 9.0%            
Debt instrument, payment terms Interest only is due and payable through January 2016, with principal and interest payments due commencing February 2016            
Debt instrument maturity period 2018-01            
End of term charge 300,000neot_DebtInstrumentEndOfTermCharge            
Interest expense 271,846us-gaap_InterestExpenseDebt 4,186us-gaap_InterestExpenseDebt          
Letter of Credit | LJ Gateway, LLC              
Debt Instrument [Line Items]              
Line of credit     200,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember
/ us-gaap_LeaseArrangementTypeAxis
= neot_LJGatewayLimitedLiabilityCompanyMember
       
Line of credit facility, expiration date     2020-05        
Minimum              
Debt Instrument [Line Items]              
Percentage of prepayment charge on debt 1.00%neot_PercentageOfPrepaymentChargeOnDebt
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
           
Maximum              
Debt Instrument [Line Items]              
Percentage of prepayment charge on debt 3.00%neot_PercentageOfPrepaymentChargeOnDebt
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
           
Prime Rate | Minimum              
Debt Instrument [Line Items]              
Debt Instrument, basis spread on variable rate 3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
           
Prime Rate | Maximum              
Debt Instrument [Line Items]              
Debt Instrument, basis spread on variable rate 9.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
           
2010 Loan and Security Agreement | Silicon Valley Bank              
Debt Instrument [Line Items]              
Line of credit facility collateralized             3,750,000us-gaap_SecuredLongTermDebt
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
Debt instrument, interest rate         7.78%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
7.78%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
 
Interest expense 0us-gaap_InterestExpense
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
4,186us-gaap_InterestExpense
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
         
2010 Loan and Security Agreement | Silicon Valley Bank | Interest Rate Floor              
Debt Instrument [Line Items]              
Debt instrument, interest rate         8.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateFloorMember
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
8.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateFloorMember
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
 
2010 Loan and Security Agreement | Silicon Valley Bank | Common Stock              
Debt Instrument [Line Items]              
Converted warrants issued to purchase shares             24,419neot_ConversionOfPreferredWarrantsToCommonWarrants
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
2010 Loan and Security Agreement | Silicon Valley Bank | Series B Convertible Preferred Stock              
Debt Instrument [Line Items]              
Warrants to purchase shares             64,865us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
2010 Loan and Security Agreement | Silicon Valley Bank | Series C Convertible Preferred Stock              
Debt Instrument [Line Items]              
Warrants to purchase shares             75,000us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_LineOfCreditFacilityAxis
= neot_SiliconValleyBankMember
/ us-gaap_LongtermDebtTypeAxis
= neot_TwoThousandTenLoanAndSecurityAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
Hercules Technology Growth Capital Inc Loan And Security Agreement              
Debt Instrument [Line Items]              
Maximum borrowing capacity         10,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
10,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
 
Number of tranches           2neot_NumberOfTranchesUnderLoanAgreement
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
 
Amount borrowed under loan agreement       6,000,000us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
4,000,000us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
   
Warrants fair value and financing fees         133,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
133,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
 
Principal balance outstanding 10,000,000us-gaap_NotesPayableToBank
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
           
Hercules Technology Growth Capital Inc Loan And Security Agreement | Initial Public Offering              
Debt Instrument [Line Items]              
Warrant exercise price per share         $ 8.54us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
$ 8.54us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
 
Warrant expiration period from date of issuance         8 years    
Hercules Technology Growth Capital Inc Loan And Security Agreement | Common Stock | Initial Public Offering              
Debt Instrument [Line Items]              
Converted warrants issued to purchase shares         46,838neot_ConversionOfPreferredWarrantsToCommonWarrants
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
46,838neot_ConversionOfPreferredWarrantsToCommonWarrants
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
 
Hercules Technology Growth Capital Inc Loan And Security Agreement | Series C Convertible Preferred Stock              
Debt Instrument [Line Items]              
Warrants issued as percentage of loan amount         4.00%neot_WarrantsIssuedAsPercentageOfLoanAdvancedAmount
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
   
Fair value of warrants issued         $ 207,429neot_FairValueOfWarrantsIssued
/ us-gaap_LongtermDebtTypeAxis
= neot_HerculesTechnologyGrowthCapitalIncLoanAndSecurityAgreementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
$ 207,429neot_FairValueOfWarrantsIssued
/ us-gaap_LongtermDebtTypeAxis
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/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember