v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 02, 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  
Entity Registrant Name MELINTA THERAPEUTICS, INC. /NEW/  
Entity Central Index Key 0001461993  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Smaller Reporting Company true  
Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   13,750,691