Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2012
Mar. 15, 2013
Document Information [Line Items]    
Document Type 10-K  
Amendment Flag false  
Document Period End Date Dec. 31, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus FY  
Trading Symbol KBIO  
Entity Registrant Name KALOBIOS PHARMACEUTICALS INC  
Entity Central Index Key 0001293310  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   24,147,815
Entity Public Float   $ 113,500,000