Document and Entity Information (USD $)
6 Months Ended
Jun. 30, 2013
Aug. 01, 2013
Document and Entity Information    
Entity Registrant Name Esperion Therapeutics, Inc.  
Entity Central Index Key 0001434868  
Document Type 10-Q  
Document Period End Date Jun. 30, 2013  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   15,357,413
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Entity Listing, Par Value Per Share $ 0.001