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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

X

- Definition

Deferred Revenue, Gift Card Sales That Will Not Be Redeemed, Percent

+ References

No definition available.

+ Details

Name:	ptlo_DeferredRevenueGiftCardSalesThatWillNotBeRedeemedPercent
Namespace Prefix:	ptlo_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration