Document and Entity Information - shares
9 Months Ended
Sep. 30, 2016
Nov. 14, 2016
Document And Entity Information    
Entity Registrant Name POSITIVEID Corp  
Entity Central Index Key 0001347022  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   332,953,028
Trading Symbol PSID  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2016