v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2016
Nov. 04, 2016
Entity Registrant Name Trade Desk, Inc.  
Entity Central Index Key 0001671933  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Class A common stock    
Entity Common Stock, Shares Outstanding   5,366,767
Class B common stock    
Entity Common Stock, Shares Outstanding   33,206,209