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Stockholders' Equity (Details Textual) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 16, 2013 | Apr. 04, 2013 | Dec. 31, 2014 | Dec. 31, 2012 | Mar. 21, 2013 | Feb. 27, 2013 | Dec. 31, 2011 | Dec. 03, 2010 | Dec. 31, 2013 | Aug. 12, 2013 | Feb. 26, 2013 | Mar. 16, 2012
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock | $ 7,700,000 us-gaap_StockIssuedDuringPeriodValueOther |  | $ 10,000,000 us-gaap_StockIssuedDuringPeriodValueOther |  |  |  |  |  |  |  |  |
Issuance of common stock, shares | 1,168,939 us-gaap_StockIssuedDuringPeriodSharesOther |  | 2,500,000 us-gaap_StockIssuedDuringPeriodSharesOther |  |  |  |  |  |  |  |  |
Shares price per share |  |  | $ 4.00 us-gaap_SaleOfStockPricePerShare |  |  |  |  |  |  |  |  |
Proceeds from sale of stock after expenses and fees | 6,900,000 us-gaap_SaleOfStockConsiderationReceivedOnTransaction |  | 9,300,000 us-gaap_SaleOfStockConsiderationReceivedOnTransaction |  |  |  |  |  |  |  |  |
Placement agent fee |  |  | 600,000 neond_PlacementAgentFee |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  | 2,500,000 neond_PurchaseOfCommonStockByWarrantIssued | 361,000 neond_PurchaseOfCommonStockByWarrantIssued |  |  |  |  |  |  |  |
Additional warrants issued to purchase shares of common stock |  |  |  | 122,238 neond_AdditionalWarrantsToPurchaseCommonStock |  |  |  |  |  |  |  |
Exercise price |  | $ 1.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 5.09 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 1.38 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  |  |  |  |  |  |  |
Common stock purchased by exercise of warrants |  |  |  | 235,144 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights |  |  |  |  |  |  |  |
Warrants issued to placement agent |  |  | 75,000 neond_WarrantsIssuedToPlacementAgent |  |  |  |  |  |  |  |  |
Stock purchase warrant |  | 40,000 neond_StockPurchaseWarrant |  |  |  |  |  |  |  |  |  |
Estimated fair value of the warrants |  | 166,000 us-gaap_FairValueAdjustmentOfWarrants |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of warrants |  | 40,000 us-gaap_ProceedsFromIssuanceOfWarrants | 12,725,000 us-gaap_ProceedsFromIssuanceOfWarrants | 168,668 us-gaap_ProceedsFromIssuanceOfWarrants |  |  |  |  |  |  |  |
Issuance costs | 800,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock conversion ratio per share of common stock |  |  | 132.07 neond_PreferredStockConversionRatio / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference |  |  | $ 0.001 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  | $ 0.001 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |
Conversion of shares |  |  | 10,962 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 19 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 8 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 4 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |
Conversion of stock, shares issued |  |  |  | 2,509 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 929 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 528 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |  |
Preferred stock voting rights description |  |  | The holders of shares of Series B Preferred stock have one vote for each share of Series B Preferred stock held by them. |  |  |  |  |  |  |  |  |
Preferred stock conversion description |  |  | Each share of Series B Preferred stock was convertible into one share of our common stock. |  |  |  |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Conversion of shares |  |  |  |  | 83 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Conversion of stock, shares issued |  |  |  |  | 39,790 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Exercise price |  |  |  |  |  |  |  |  | $ 3.13 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Exercise price |  |  |  |  |  |  |  |  | $ 1.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  | 17,000 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 17,500 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  | 1,815,368 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |
Additional warrants issued to purchase shares of common stock |  |  | 11,500 neond_AdditionalWarrantsToPurchaseCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  | 429,536 neond_AdditionalWarrantsToPurchaseCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |
Exercise price |  |  | $ 3.13 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | $ 3.13 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  |  |  |  |
Common stock purchased by exercise of warrants |  |  | 10,053 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  | 20,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 120,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 1,384,719 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |
Estimated fair value of the warrants |  |  |  |  |  |  | 75,000 us-gaap_FairValueAdjustmentOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 198,000 us-gaap_FairValueAdjustmentOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |
Proceeds from issuance of warrants |  |  | 36,000 us-gaap_ProceedsFromIssuanceOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember | 54,775 us-gaap_ProceedsFromIssuanceOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |  |  | 714,000 us-gaap_ProceedsFromIssuanceOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |  |
Warrant [Member] | Phenning Holdings Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  | 227,661 neond_PurchaseOfCommonStockByWarrantIssued / dei_LegalEntityAxis = neond_PhenningHoldingsLtdMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  | 182,890 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / dei_LegalEntityAxis = neond_PhenningHoldingsLtdMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |
Warrant [Member] | David Brunton [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  |  | 320,000 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefFinancialOfficerMember |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  |  | 266,228 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefFinancialOfficerMember |
Warrant [Member] | Thomas Eriksson [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  | 400,000 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  | 326,608 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Warrant [Member] | Per Bystedt [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  | 387,773 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember |  |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  | 316,624 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember |  |
Warrant [Member] | Mats Dahlin [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  | 215,724 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_MatsDahlinMember |  |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  | 176,143 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_MatsDahlinMember |  |
Warrant [Member] | John Reardon [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |
Placement agent fee |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 neond_PlacementAgentFee / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_JohnReardonMember
Warrants issued to purchase shares of common stock |  |  |  |  |  |  |  |  |  | 80,000 neond_PurchaseOfCommonStockByWarrantIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_JohnReardonMember |  |
Common stock purchased by exercise of warrants |  |  |  |  |  |  |  |  |  | 65,322 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_JohnReardonMember |  | 174,798 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember / us-gaap_TitleOfIndividualAxis = neond_JohnReardonMember

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- Definition Warrants issued to placement agent. + References No definition available. + Details
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- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Describe the conversion features of preferred stock if preferred stock is convertible. That is, shares of preferred stock into which another convertible security was converted, or shares of preferred stock into which another class of preferred stock was converted. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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