Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 06, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol ECOR  
Entity Registrant Name electroCore, Inc.  
Entity Central Index Key 0001560258  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   29,593,535
Entity File Number 001-38538  
Entity Tax Identification Number 203454976  
Entity Address, Address Line One 150 Allen Road  
Entity Address, Address Line Two Suite 201  
Entity Address, City or Town Basking Ridge  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07920  
City Area Code 973  
Local Phone Number 290-0097