v3.4.0.3
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Jan. 31, 2016
Apr. 15, 2016
Jul. 31, 2015
Entity Registrant Name Comarco Inc    
Entity Central Index Key 0000022252    
Trading Symbol cmro    
Current Fiscal Year End Date --01-31    
Entity Filer Category Smaller Reporting Company    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding (in shares)   14,644,165  
Entity Public Float     $ 23
Document Type 10-K    
Document Period End Date Jan. 31, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Amendment Flag false