Document And Entity Information
3 Months Ended
Mar. 31, 2012
May 11, 2012
Document and Entity Information [Abstract]    
Entity Registrant Name POSITIVEID Corp  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   111,105,658
Amendment Flag false  
Entity Central Index Key 0001347022  
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 Mar. 31, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1