CarParts.com, Inc. Annual report pursuant to Section 13 and 15(d)

Restructuring Costs (Detail)

Restructuring Costs (Detail) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended		3 Months Ended	0 Months Ended
Restructuring Costs (Detail) (USD $)	Aug. 31, 2012 employee	Mar. 30, 2013 employee	Jun. 29, 2013 employee	Dec. 28, 2013	Jan. 03, 2015	Jan. 03, 2015	Jul. 25, 2014 employee
Fiscal 2012 \| Lasalle, Illinois
Restructuring Cost and Reserve [Line Items]
Headcount reduction, number of employees	71
Fiscal 2012 \| Employee severance
Restructuring Cost and Reserve [Line Items]
Severance charges	640,000
Fiscal 2012 \| Employee severance \| Fulfillment Expense
Restructuring Cost and Reserve [Line Items]
Severance charges	228,000
Fiscal 2012 \| Employee severance \| Marketing expense
Restructuring Cost and Reserve [Line Items]
Severance charges	396,000
Fiscal 2012 \| Employee severance \| Technology expense
Restructuring Cost and Reserve [Line Items]
Severance charges	16,000
Fiscal 2013
Restructuring Cost and Reserve [Line Items]
Headcount reduction, number of employees		176	15
Fiscal 2013 \| United States
Restructuring Cost and Reserve [Line Items]
Headcount reduction, number of employees		13
Fiscal 2013 \| Philippines
Restructuring Cost and Reserve [Line Items]
Headcount reduction, number of employees		163
Fiscal 2013 \| Employee severance
Restructuring Cost and Reserve [Line Items]
Severance payable				0
Severance charges				723,000
Adjustments to severance payable				0
Fiscal 2013 \| Employee severance \| Fulfillment Expense
Restructuring Cost and Reserve [Line Items]
Severance charges				58,000
Fiscal 2013 \| Employee severance \| Marketing expense
Restructuring Cost and Reserve [Line Items]
Severance charges				394,000
Fiscal 2013 \| Employee severance \| General and administrative expense
Restructuring Cost and Reserve [Line Items]
Severance charges				109,000
Fiscal 2013 \| Employee severance \| Technology expense
Restructuring Cost and Reserve [Line Items]
Severance charges				162,000
Fiscal 2014
Restructuring Cost and Reserve [Line Items]
Number of remaining warehouses					2	2
Fiscal 2014 \| Inventory transfers \| Cost of Sales
Restructuring Cost and Reserve [Line Items]
Inventory not deemed economically transferable					130,000
Inventory write-down					767,000
Aggregate inventory charge					897,000
Fiscal 2014 \| Employee severance
Restructuring Cost and Reserve [Line Items]
Severance payable					0	0
Fiscal 2014 \| Employee severance \| Fulfillment Expense
Restructuring Cost and Reserve [Line Items]
Reduction in severance charges						$ 26,000
Fiscal 2014 \| Facility Closure \| Carson, California
Restructuring Cost and Reserve [Line Items]
Headcount reduction, number of employees							77