Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of State NOL Carryforwards Expiration Year (Detail)

v2.4.1.9
Income Taxes - Summary of State NOL Carryforwards Expiration Year (Detail) (State, USD $)
In Thousands, unless otherwise specified
Jan. 03, 2015
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 73,610us-gaap_OperatingLossCarryforwards
2015-2022  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 40,553us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ prts_TaxPeriodAxis
= prts_TaxCreditCarryforwardExpirationPeriodOneMember
2023-2032  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 33,057us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ prts_TaxPeriodAxis
= prts_TaxCreditCarryforwardExpirationPeriodTwoMember