Refers to percentage of borrowing base on eligible accounts by the entity.

No definition available.

Name:	par_BorrowingBasePercentageEligibleAccounts
Namespace Prefix:	par_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Refers to borrowing base percentage on eligible finished goods inventory by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	par_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Refers to borrowing base percentage on eligible raw material inventory by the entity.

+ References

No definition available.

+ Details

Name:	par_BorrowingBasePercentageEligibleRawMaterialInventory
Namespace Prefix:	par_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Borrowing base percentage, total eligible inventory included in borrowing base

+ References

No definition available.

+ Details

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Namespace Prefix:	par_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Consolidated Indebtedness Ratio

+ References

No definition available.

+ Details

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Namespace Prefix:	par_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Refers to fixed charge coverage ratio by the entity during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	par_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Accordion Feature, Borrowing Increments

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
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- Details

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Balance Type:
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- Details

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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=par_CollateralizedMortgageBackedLoanMember
Namespace Prefix:
Data Type:	na
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Period Type:

Debt - Narrative (Details)			12 Months Ended
Debt - Narrative (Details)	Jun. 05, 2018 USD ($)	Nov. 29, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Borrowings on line of credit			$ 7,819,000	$ 950,000
Revolving Loans \| Citizens Bank, N.A.
Debt Instrument [Line Items]
Revolving loans, aggregate principal amount	$ 25,000,000.0
Revolving loans, accordion option	15,000,000.0
Revolving loans, accordion option, borrowing increments	$ 5,000,000
Credit Facility maturity term	3 years
Revolving Loans \| Citizens Bank, N.A. \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Line of Credit \| Credit Agreement
Debt Instrument [Line Items]
Credit agreement term		3 years
Revolving loans, aggregate principal amount		$ 15,000,000
Borrowing base percentage, eligible accounts		80.00%
Borrowing base percentage, eligible raw material inventory		50.00%
Borrowing base percentage, eligible finished goods inventory		35.00%
: Borrowing base percentage, total eligible inventory included in borrowing base		50.00%
Consolidated indebtedness ratio		3.0
Fixed charge coverage ratio		1.25
Secured Debt \| Collateralized Mortgage backed Loan
Debt Instrument [Line Items]
Amount outstanding			$ 0