Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	Dec. 30, 2023	Dec. 31, 2022
Fair Value Measurements
Transfers into level 2 from level 1 assets	$ 0	$ 0
Transfers into level 1 from level 2 assets	$ 0	$ 0

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

No definition available.

Name:	prts_FairValueAssetsLevel1ToLevel2TransfersAmount1
Namespace Prefix:	prts_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant