Document and Entity Information
9 Months Ended
Sep. 30, 2015
Nov. 02, 2015
Document and Entity Information    
Entity Registrant Name INTERMOLECULAR INC  
Entity Central Index Key 0001311241  
Document Type 10-Q  
Document Period End Date Sep. 30, 2015  
Amendment Flag false  
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 Accelerated Filer  
Entity Common Stock, Shares Outstanding   48,920,754
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3