Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 05, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name AutoWeb, Inc.  
Entity Central Index Key 0001023364  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business true  
Entity Common Stock, Shares Outstanding   13,146,831
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Entity Interactive Data Current Yes  
Entity Incorporation State Country Code DE  
Entity File Number 001-34761  
Title of 12b security Common Stock, par value $0.001 per share  
Trading Symbol AUTO  
Security Exchange Name NASDAQ