v3.19.2
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Sep. 12, 2019
Jun. 30, 2018
Document And Entity Information [Abstract]      
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 ACURA PHARMACEUTICALS, INC    
Entity Central Index Key 0000786947    
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 Public Float     $ 2.7
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol ACUR    
Entity Common Stock, Shares Outstanding   21,300,192