Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v2.4.0.6
Document and Entity Information
9 Months Ended
Sep. 29, 2012
Oct. 31, 2012
Document and Entity Information [Abstract]    
Entity Registrant Name U.S. Auto Parts Network, Inc.  
Entity Central Index Key 0001378950  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 29, 2012  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2012  
Current Fiscal Year End Date --12-29  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   31,128,043