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REVENUE RECOGNITION - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 25, 2023 | Jun. 30, 2024 | Jun. 25, 2023
Revenue from Contract with Customer [Abstract] |  |  |  |
Gift card sales that will not be redeemed, percent | 11.00% |  | 11.00% |
Gift card breakage | $ 200 | $ 200 | $ 502 | $ 528

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- Definition Deferred Revenue, Gift Card Sales That Will Not Be Redeemed, Percent + References No definition available. + Details
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Namespace Prefix: | ptlo_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Gift Card Breakage + References No definition available. + Details
Name: | ptlo_GiftCardBreakage
Namespace Prefix: | ptlo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration