v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Oct. 31, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Entity Registrant Name EVOFEM BIOSCIENCES, INC.  
Entity Central Index Key 0001618835  
Common stock, shares outstanding   25,867,248