• Filing Date: 2019-03-15
  • Form Type: 10-K
  • Description: Annual report
v3.19.1
Document and Entity Information Document - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 11, 2019
Jun. 30, 2018
Entity Information [Line Items]      
Entity Registrant Name ACACIA RESEARCH CORP    
Entity Central Index Key 0000934549    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   49,647,693  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 203,206,000
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false