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Stock-Based Compensation (Details 4) (USD $)	3 Months Ended
	Mar. 31, 2015
Summary of outstanding warrants to purchase common stock
Shares	3,335,073neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber
August 2009 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Aug. 25, 2009
Exercise Price	$ 0.50invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_AugustTwoThousandNineEmployeeWarrantsMember
Shares	80,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_AugustTwoThousandNineEmployeeWarrantsMember
Expiration Date	Aug. 25, 2016
2007 Debt Extension Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Sep. 22, 2010
Exercise Price	$ 1.00invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_DebtExtensionWarrantsMember
Shares	16,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_DebtExtensionWarrantsMember
Expiration Date	Sep. 22, 2015
December 2010 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Dec. 03, 2010
Exercise Price	$ 1.63invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_DecemberTwoThousandTenEmployeeWarrantsMember
Shares	200,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_DecemberTwoThousandTenEmployeeWarrantsMember
Expiration Date	Dec. 03, 2015
February 2011 Legal Advisor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Feb. 22, 2011
Exercise Price	$ 2.50invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_FebruaryTwoThousandElevenLegalAdvisorWarrantMember
Shares	80,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_FebruaryTwoThousandElevenLegalAdvisorWarrantMember
Expiration Date	Feb. 22, 2016
March 2011 Investor Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Mar. 09, 2011
Exercise Price	$ 3.13invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_MarchTwoThousandElevenInvestorWarrantsMember
Shares	349,973neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_MarchTwoThousandElevenInvestorWarrantsMember
Expiration Date	Mar. 09, 2016
March 2011 Investor Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Apr. 07, 2011
Exercise Price	$ 3.13invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_MarchTwoThousandElevenInvestorWarrantsOneMember
Shares	34,100neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_MarchTwoThousandElevenInvestorWarrantsOneMember
Expiration Date	Apr. 07, 2016
May 2014 Agent Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	May 15, 2014
Exercise Price	$ 5.09invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_MayTwoThousandFourteenAgentWarrantMember
Shares	75,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_MayTwoThousandFourteenAgentWarrantMember
Expiration Date	Nov. 15, 2015
May 2014 Investor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	May 15, 2014
Exercise Price	$ 5.09invest_InvestmentWarrantsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = neond_MayTwoThousandFourteenInvestorWarrantMember
Shares	2,500,000neond_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsWarrantsOutstandingAndExercisableNumber / us-gaap_ClassOfWarrantOrRightAxis = neond_MayTwoThousandFourteenInvestorWarrantMember
Expiration Date	Nov. 15, 2015

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- Definition

Exercise price of the warrants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column A

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding and exercisable as of the balance sheet date.

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Date the equity-based award expires, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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