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Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Schedule of property and equipment    
Equipment under capital lease $ 458us-gaap_CapitalLeasedAssetsGross   
Less accumulated depreciation and amortization (350)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (214)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net 654us-gaap_PropertyPlantAndEquipmentNet 335us-gaap_PropertyPlantAndEquipmentNet
Computers, software, furniture and fixtures [Member]    
Schedule of property and equipment    
Computers, software, furniture and fixtures $ 546us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= neond_ComputersSoftwareFurnitureAndFixturesMember
$ 549us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= neond_ComputersSoftwareFurnitureAndFixturesMember