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Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		12 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2015 USD ($) Customers	Mar. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 JPY (¥)	Mar. 31, 2015 KRW	Mar. 31, 2015 SEK	Mar. 31, 2015 Accounts Receivable [Member]	Dec. 31, 2014 Accounts Receivable [Member]	Mar. 31, 2015 Sales Revenue, Net [Member]	Mar. 31, 2014 Sales Revenue, Net [Member]	Mar. 31, 2015 Hewlett Packard [Member] Sales Revenue, Net [Member]	Mar. 31, 2014 Kobo Inc [Member] Sales Revenue, Net [Member]	Mar. 31, 2014 Leap Frog Enterprises Inc [Member] Sales Revenue, Net [Member]	Mar. 31, 2014 Netronix Inc [Member] Sales Revenue, Net [Member]	Mar. 31, 2014 Sony Corporation [Member] Sales Revenue, Net [Member]	Mar. 31, 2015 Amazon Inc [Member] Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	$ 250,000us-gaap_CashFDICInsuredAmount			¥ 10,000,000us-gaap_CashFDICInsuredAmount	50,000,000us-gaap_CashFDICInsuredAmount	100,000us-gaap_CashFDICInsuredAmount
Allowance for doubtful accounts	167,000us-gaap_AllowanceForDoubtfulAccountsReceivable		167,000us-gaap_AllowanceForDoubtfulAccountsReceivable
Environmental Costs Recognized, Capitalized in Period	613,000us-gaap_EnvironmentalCostsRecognizedCapitalizedInPeriod		200,000us-gaap_EnvironmentalCostsRecognizedCapitalizedInPeriod
Foreign currency translation adjustments	2,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	35,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Foreign currency translation included in general and administrative expense	26,000us-gaap_OtherSellingGeneralAndAdministrativeExpense	26,000us-gaap_OtherSellingGeneralAndAdministrativeExpense
Concentration risk, Percentage							68.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember	87.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_HewlettPackardMember	11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_KoboIncMember	30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_LeapFrogEnterprisesIncMember	14.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_NetronixIncMember	16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_SonyCorporationMember	28.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_MajorCustomersAxis = neond_AmazonIncMember
Advertising costs	20,000us-gaap_AdvertisingExpense	106,000us-gaap_AdvertisingExpense
Exchange rate for the consolidated balance sheets (Swedish Krona to one U.S. Dollar)	8.32us-gaap_ForeignCurrencyExchangeRateTranslation1	6.46us-gaap_ForeignCurrencyExchangeRateTranslation1
Excess of insurance limits	4,000,000neond_ExcessOfInsuranceLimits
Weighted-average exchange rate for consolidated statements of operations (Japanese Yen to one U.S. Dollar)	119.15neond_WeightedAverageExchangeRateForStatementsOfOperationsAndComprehensiveLossOne	102.82neond_WeightedAverageExchangeRateForStatementsOfOperationsAndComprehensiveLossOne
Exchange rate for the consolidated balance sheets (Japanese Yen to one U.S. Dollar)	119.63neond_ForeignCurrencyExchangeRateTranslationOne	119.93neond_ForeignCurrencyExchangeRateTranslationOne
Weighted-average exchange rate for consolidated statements of operations (South Korean won to one U.S. Dollar)	1100.00%neond_WeightedAverageExchangeRateForTheConsolidatedStatementOfOperationsAndOfComprehensiveLossTwo
Exchange rate for the consolidated balance sheets (South Korean Won to one U.S. Dollar )	1104.97%neond_ForeignCurrencyExchangeRateTranslationTwo		1096.73%neond_ForeignCurrencyExchangeRateTranslationTwo
Weighted-average exchange rate (Swedish Krona to one U.S. Dollar)	8.60neond_WeightedAverageExchangeRateForStatementsOfOperationsAndComprehensiveLoss		7.80neond_WeightedAverageExchangeRateForStatementsOfOperationsAndComprehensiveLoss
Number of customers	24neond_NumberOfCustomers
Central Deposit Insurance Corporation	$ 3,000,000neond_CashCentralInsuredAmount
Weighted-average exchange rate (Taiwan Dollar to one U.S)	31.56neond_WeightedAverageExchangeRateForTheConsolidatedStatementOfOperationsAndOfComprehensiveLossThree
Exchange rate for the consolidated balance sheets (Taiwan Dollar to one U.S)	31.20neond_ForeignCurrencyExchangeRateTranslationThree

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