v3.8.0.1
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Jun. 06, 2018
Jun. 30, 2017
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
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 No    
Entity Filer Category Smaller Reporting Company    
Entity Public Float     $ 4.2
Trading Symbol ACUR    
Entity Common Stock, Shares Outstanding   21,033,528