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Deferred Revenues (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 Customers | Dec. 31, 2013 Customers
Deferred Revenues (Textual) |  |
Deferred license fee revenue | $ 3,403 us-gaap_DeferredRevenueCurrent | $ 3,666 us-gaap_DeferredRevenueCurrent
Prepayments from Future License Fees [Member] |  |
Deferred Revenues (Textual) |  |
Deferred license fee revenue | 3,000 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember | 2,500 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember
Number of customer | 5 neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember | 3 neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember
Deferred Engineering Development Fees [Member] |  |
Deferred Revenues (Textual) |  |
Deferred license fee revenue | $ 400 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember | $ 1,200 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember
Number of customer | 5 neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember | 21 neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember

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- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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