CarParts.com, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation (Details Textual)

Stockholders' Equity and Share-Based Compensation (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended	3 Months Ended		6 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended		1 Months Ended		6 Months Ended			6 Months Ended		3 Months Ended			6 Months Ended				6 Months Ended
	May 05, 2009	Apr. 27, 2010	Jun. 29, 2013 Director	Jun. 30, 2012	Jun. 29, 2013 Director	Jun. 30, 2012	Dec. 29, 2012	Mar. 30, 2013 Common Stock [Member] William Blair & Company LLC [Member]	Mar. 30, 2013 Common Stock [Member] William Blair & Company LLC [Member]	Mar. 30, 2013 Series A Convertible Preferred Stock [Member]	Jun. 29, 2013 Series A Convertible Preferred Stock [Member]	Apr. 30, 2013 Series A Convertible Preferred Stock [Member]	Mar. 30, 2013 Series A Convertible Preferred Stock [Member]	Jun. 29, 2013 Series A Convertible Preferred Stock [Member] Vote	Mar. 25, 2013 Series A Convertible Preferred Stock [Member]	Dec. 29, 2012 Series A Convertible Preferred Stock [Member]	Jun. 29, 2013 Minimum [Member]	Jun. 30, 2012 Maximum [Member]	Mar. 30, 2013 Warrants [Member]	Jun. 30, 2012 Warrants [Member]	Mar. 31, 2012 Warrants [Member]	Jun. 29, 2013 Warrants [Member]	Jun. 30, 2012 Warrants [Member]	Apr. 27, 2010 Warrants [Member]	May 05, 2009 Warrants [Member]	Jun. 29, 2013 2007 Omnibus Plan [Member]	Jun. 29, 2013 2007 New Employee Incentive Plan [Member]	Jun. 29, 2013 2007 New Employee Incentive Plan [Member] Stock Option [Member]	Jun. 29, 2013 2006 Equity Incentive Plan [Member]	Jun. 29, 2013 Board of Directors [Member]
Stockholders' Equity and Share Based Compensation (Textual) [Abstract]
Common stock issued			33,209,000		33,209,000		31,128,000																							14,000
Equity value of issued stock awards			$ 21		$ 21
Number of non-employee directors awarded common stock for service fees			1,000		1,000
Sale of common stock to William Blair & Company, LLC									2,050,000
Share Price under common stock purchase agreement								$ 1.09	$ 1.09
Proceeds to the company under common stock purchase agreement								2,235
Issuance costs incurred to company										822
Payment of issuance costs under common stock purchase agreement								223						822
Series A convertible preferred stock, shares authorized														4,150,000	4,150,000	4,150,000
Aggregate Shares to be sold															4,150,000
Series A convertible preferred stock, par value														$ 0.001	$ 0.001	$ 0.001
Preferred stock purchase price per share															$ 1.45
Preferred stock purchase, Amount													6,017
Preferred stock sold												150,000	4,000,000
Aggregate proceeds of preferred stock												217	5,800
Fixed conversion price for Series A Preferred into shares of Common Stock														$ 1.45
Conversion rate of common stock for each share of Series A preferred stock														1
Consecutive trading days for calculating weighted average price for the Common Stock														30 days
Minimum common stock price for consecutive thirty trading days for stock conversion														$ 4.35
Amount per share to series A preferred in case of liquidation														$ 1.45		$ 1.45
Preferred stock quarterly dividend rate														$ 0.058
Preferred stock voting rights per share														1
Cash dividends on amended credit														400
Accrued dividend on Series A convertible preferred stock											64
Common stock authorized																										2,400,000		2,000,000
Maximum number of shares authorized to issued under condition one																										1,500,000
Maximum percentage of shares authorized to issued under condition one																										5.00%
Expiration period																										10 years	10 years
Option grant vesting period																										4 years	4 years
Exercise price of option grants																										100.00%	100.00%
Shares available for future grants																										2,094	782,000		0
Common stock warrants issued during period																								20,000	30
Warrant exercise price for warrants issued during period																								8.32	2.14
Increment of shares in warrant vest																								830	830
Grant date fair value of warrants issued during period																								$ 2.12	$ 1.09
Re-measured fair value of warrants																				$ 3.14	$ 1.42
Warrants exercised during period																			0
Outstanding common stock warrants																						50,000
Aggregate intrinsic value of outstanding and exercisable warrants																						0
Share-based compensation expense recognized related to warrants																						0	16
Unrecognized share-based compensation expense related to warrants outstanding																						0
Revised estimated forfeiture rate																	16.00%	34.00%
Stockholders' Equity and Share Based Compensation (Additional Textual) [Abstract]
Common stock, shares authorized			100,000,000		100,000,000		100,000,000
Shares of common stock issued from option exercises					17,000
Percentage of changes of control of company and sales or other dispositions by company					more than 50%
Weighted-average fair value of options granted					$ 0.80	$ 2.65
Intrinsic value of the exercised options			4	52	4	52
Unrecognized share-based compensation expense			1,399		1,399
Weighted-average period of unrecognized share-based compensation expense					2 years 3 months 15 days
Termination period of warrants after grant date	7 years	7 years
Warrants vest in equal monthly increments	36 months	24 months
Amounts capitalized to internally-developed software			$ 68	$ 85	$ 149	$ 136