Note 11 - Contingencies (Details Textual) $ in Thousands	3 Months Ended	9 Months Ended
Nov. 25, 2018 USD ($)	Nov. 25, 2018 USD ($)
Number of Sites of Company or Subsidiaries That Have Been Named for Potential Environmental Remediation Liability		3
Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers		100.00%
Number of Units Covered Under General Liability Insurance Coverage		2
Environmental Remediation Expense	$ 0
Accrual for Environmental Loss Contingencies, Ending Balance	$ 0	$ 0

Number of sites of the company or subsidiaries that have been named for potential environmental remediation liability.

No definition available.

Name:	pke_NumberOfSitesOfCompanyOrSubsidiariesThatHaveBeenNamedForPotentialEnvironmentalRemediationLiability
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of units covered under general liability insurance coverage.

+ References

No definition available.

+ Details

Name:	pke_NumberOfUnitsCoveredUnderGeneralLiabilityInsuranceCoverage
Namespace Prefix:	pke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of legal defense and remediation costs associated with sites reimbursed by insurance carriers.

+ References

No definition available.

+ Details

Name:	pke_PercentageOfLegalDefenseAndRemediationCostsAssociatedWithSitesReimbursedByInsuranceCarriers
Namespace Prefix:	pke_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

+ Details

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

- Definition

The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109237650&loc=d3e13064-110858

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration