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Deferred Revenues (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015 Customers	Dec. 31, 2014 Customers
Deferred Revenues (Textual)
Deferred license fee revenue	$ 4,146us-gaap_DeferredRevenueCurrent	$ 3,403us-gaap_DeferredRevenueCurrent
Prepayments for Future License Fees [Member]
Deferred Revenues (Textual)
Deferred license fee revenue	2,300us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember	3,000us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember
Number of customer	5neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_PrepaymentsFromFutureLicenseFeesMember
Deferred Engineering Development Fees [Member]
Deferred Revenues (Textual)
Deferred license fee revenue	$ 1,800us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember	$ 400us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember
Number of customer	3neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember	5neond_NumberOfCustomer / us-gaap_DeferredRevenueArrangementTypeAxis = neond_DeferredEngineeringDevelopmentFeesMember

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Number of customer.

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No definition available.

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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

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