Acquisition (Details) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2015
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 56,903,000
Net loss	(1,246,000)
Earnings per share [Abstract]
Basic (in dollars per share)	$ (0.08)
Diluted (in dollars per share)	$ (0.08)
Brink Software Inc. [Member]
Business Acquisition [Line Items]
Payments for the acquisition		10,000,000
Period of purchase price payable		2 years
Contingent liability payable, Maximum		7,000,000
Percentage of equity interest (in hundredths)		100.00%
Contingent purchase agreement escrow provision		1,000,000
Net cash paid for purchase of business		5,000,000
Estimated fair value liability for contingent consideration		5,000,000
Fair value of the long term portion of the note payable		1,800,000
Brink Software Inc. [Member] \| Tranche One [Member]
Business Acquisition [Line Items]
Payments for the acquisition		5,000,000
Percentage of equity interest (in hundredths)		51.00%
Brink Software Inc. [Member] \| Tranche Two [Member]
Business Acquisition [Line Items]
Payments for the acquisition		3,000,000
Percentage of equity interest (in hundredths)		49.00%
Brink Software Inc. [Member] \| Tranche Three [Member]
Business Acquisition [Line Items]
Payments for the acquisition		$ 2,000,000

Business acquisition purchase price payable over a certain period of years.

No definition available.

Name:	par_BusinessAcquisitionPeriodOfPurchasePricePayable
Namespace Prefix:	par_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

The agreement provides a portion of the purchase price to be delivered into escrow if one or more claims arise within the first twelve months of the transaction. Such escrow will serve as a source of payment for any indemnification obligations that may arise.

+ References

No definition available.

+ Details

Name:	par_EscrowProvisionForContingentPurchaseAgreement
Namespace Prefix:	par_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This line item represents the estimated fair value liability for contingent consideration.

+ References

No definition available.

+ Details

Name:	par_EstimatedFairValueLiabilityForContingentConsideration
Namespace Prefix:	par_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

+ Details

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

- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

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

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

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

- Definition

Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=par_BrinkSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: