XML 41 R23.htm IDEA: XBRL DOCUMENT v2.4.1.9
Interim Period Reporting (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2014
Interim Period Reporting [Abstract]        
Net loss $ (2,072)us-gaap_NetIncomeLoss   $ (4,008)us-gaap_NetIncomeLoss  
Accumulated deficit (168,001)us-gaap_RetainedEarningsAccumulatedDeficit     (165,929)us-gaap_RetainedEarningsAccumulatedDeficit
Net cash used in operating activities $ (1,585)us-gaap_NetCashProvidedByUsedInOperatingActivities   $ (2,646)us-gaap_NetCashProvidedByUsedInOperatingActivities  
Shares registered and available for issuance   5,000,000neond_StockIssuedDuringPeriodSharesFutureOffering