Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Jan. 18, 2019
Jun. 30, 2018
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Registrant Name NeuroMetrix, Inc.    
Entity Central Index Key 0001289850    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 9,257,703
Trading Symbol NURO    
Entity Common Stock, Shares Outstanding   7,680,463  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   454,781