v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Jan. 31, 2013
Apr. 25, 2013
Jul. 31, 2012
Document and Entity Information [Abstract]      
Entity Registrant Name COMARCO INC    
Document Type 10-K    
Current Fiscal Year End Date --01-31    
Entity Common Stock, Shares Outstanding   14,259,839  
Entity Public Float     $ 1,600,000
Amendment Flag false    
Entity Central Index Key 0000022252    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Smaller Reporting Company    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jan. 31, 2013    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY