Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 30, 2019
May 08, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name U.S. Auto Parts Network, Inc.  
Entity Central Index Key 0001378950  
Current Fiscal Year End Date --12-28  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol PRTS  
Amendment Flag false  
Smaller Reporting Company true  
Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   35,520,871