Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity Registrant Name Esperion Therapeutics, Inc.  
Entity File Number 001-35986  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 26-1870780  
Entity Address, Address Line One 3891 Ranchero Drive, Suite 150  
Entity Address, City or Town Ann Arbor  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48108  
City Area Code 734  
Local Phone Number 887-3903  
Title of 12(b) Security Common Stock  
Trading Symbol ESPR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   27,327,409
Entity Central Index Key 0001434868  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false