v3.5.0.1
Document And Entity Information - shares
3 Months Ended
Apr. 30, 2016
Jun. 14, 2016
Document Information [Line Items]    
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
Document Type 10-Q  
Document Period End Date Apr. 30, 2016  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Amendment Flag false