Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
May 06, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name FATE THERAPEUTICS INC  
Entity Central Index Key 0001434316  
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Trading Symbol FATE  
Entity Common Stock, Shares Outstanding   65,185,834
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1