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

Annual report pursuant to Section 13 and 15(d)

Borrowings - Additional Information (Detail)

Borrowings - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended		12 Months Ended	0 Months Ended		5 Months Ended	6 Months Ended	12 Months Ended	18 Months Ended
Borrowings - Additional Information (Detail) (USD $)	Jan. 03, 2015	Jan. 02, 2015	Jan. 01, 2015	Jan. 01, 2015	Jul. 01, 2016	Jan. 03, 2016	May 31, 2016	Dec. 31, 2016	Dec. 31, 2016	Jun. 30, 2016	Dec. 28, 2013
Line of Credit Facility [Line Items]
Revolving loan payable	$ 11,022,000us-gaap_LinesOfCreditCurrent										$ 6,774,000us-gaap_LinesOfCreditCurrent
Total capital leases payable	9,539,000
Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Number of consecutive days excess availability is above required amount	45 days
Event of default amount	0
JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Net orderly liquidation value inventory advance rate		90.00%	85.00%
Minimum availability required trigger amount (if less than)	4,000,000	4,000,000		6,000,000
Number of consecutive days excess availability is above required amount		45 days
Maximum borrowing capacity	25,000,000
Maximum revolving commitment upon fulfillment of certain conditions	40,000,000
Line of credit facility maturity date	Apr. 26, 2017
Revolving loan payable	11,022,000
Unused credit commitment fee	0.25%
Cash dominion period exit amount of excess availability (greater than)	4,000,000
Excess availability under credit facility	8,329,000
Early repayment premium percentage	0.50%
London Interbank Offered Rate (LIBOR) \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
LIBOR based interest rate, principal	11,000,000
Interest rate	2.44%
London Interbank Offered Rate (LIBOR) \| JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Applicable margin for LIBOR-based interest rate/ Applicable margin for Alternate base rate	2.25%
Base Rate \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Interest rate	3.50%
Prime Based Rate Principal	22,000
Base Rate \| JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Applicable margin for LIBOR-based interest rate/ Applicable margin for Alternate base rate	0.25%
Scenario, Forecast \| JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Minimum availability required trigger amount (if less than)								2,000,000	2,000,000
Testing period the Company is subject to a fixed charge coverage ratio							5 months		12 months
Decrease to the applicable margin					0.50%
Limited security by foreign subsidiaries' capital stock percentage										65.00%
Premium required						0
Minimum availability required under availability block										2,000,000
Minimum fixed charge coverage ratio if less than minimum excess availability					1.0
Line of Credit \| JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Net orderly liquidation value inventory advance rate		90.00%	85.00%
Minimum availability required trigger amount (if less than)		4,000,000		6,000,000
Number of consecutive days excess availability is above required amount		45 days
Line of Credit \| Scenario, Forecast \| JPMorgan Chase Bank \| Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Minimum availability required trigger amount (if less than)									$ 2,000,000
Number of consecutive days excess availability is above required amount									45 days
Testing period the Company is subject to a fixed charge coverage ratio							5 months		12 months