Revenue Recognition - Deferred Revenue for Long-term (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Revenue, Remaining Performance Obligation [Roll Forward]
Beginning balance - January 1	$ 11,454	$ 13,584
Acquired deferred revenue (Note 3)	7,680	0
Recognition of deferred revenue	(42,052)	(14,112)
Deferral of revenue	38,333	14,682
Ending balance - June 30	$ 15,415	$ 14,154

Contract With Customer, Liability, Liability Recorded

No definition available.

Name:	par_ContractWithCustomerLiabilityLiabilityRecorded
Namespace Prefix:	par_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contract with Customer, Liability, Revenue Recognized Including Liabilities Incurred In The Current Period

+ References

No definition available.

+ Details

Name:	par_ContractWithCustomerLiabilityRevenueRecognizedIncludingLiabilitiesIncurredInTheCurrentPeriod
Namespace Prefix:	par_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenue, Remaining Performance Obligation [Roll Forward]

+ References

No definition available.

+ Details

Name:	par_RevenueRemainingPerformanceObligationRollForward
Namespace Prefix:	par_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant