Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Mar. 15, 2016
Document and Entity Information    
Entity Registrant Name Neos Therapeutics, Inc.  
Entity Central Index Key 0001467652  
Trading Symbol neos  
Document Type 10-K  
Document Period End Date Dec. 31, 2015  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Public Float   $ 160.6
Entity Common Stock, Shares Outstanding   16,035,048
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus FY