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v3.25.1

Leases - Schedule of Lease Terminations (Details) $ in Thousands | 3 Months Ended
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Mar. 30, 2025 USD ($) Termination | Mar. 31, 2024 USD ($) Termination
Leases [Abstract] |  |
Leases terminated | Termination | 2 | 1
Lease termination (income) costs | $ (578,000) | $ 200
Right-of-use assets derecognized upon lease termination | 309,000 | 416
Lease liabilities derecognized upon lease termination | 344,000 | 506
(Gain) loss recognized upon lease termination | $ (613,000) | $ 110

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- Definition Lease liabilities derecognized upon lease termination. + References No definition available. + Details
Name: | pbpb_LeaseLiabilitiesDerecognizedUponLeaseTermination
Namespace Prefix: | pbpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of Lease termination fees. + References No definition available. + Details
Name: | pbpb_LeaseTerminationIncomeCosts
Namespace Prefix: | pbpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number of leases terminated. + References No definition available. + Details
Name: | pbpb_NumberOfLeasesTerminated
Namespace Prefix: | pbpb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Right-of-use assets derecognized upon lease termination. + References No definition available. + Details
Name: | pbpb_RightOfUseAssetsDerecognizedUponLeaseTermination
Namespace Prefix: | pbpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479092/842-20-40-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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