Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.3.0.814
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2015
Oct. 26, 2015
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Trading Symbol SGMO  
Entity Registrant Name SANGAMO BIOSCIENCES INC  
Entity Central Index Key 0001001233  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   70,046,841