Number of insurance carriers.

No definition available.

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

- Definition

Number of insurance carriers that have filed answers to the lawsuit.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, net of estimated reinsurance recoveries.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

+ Details

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

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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

- Details

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

- Details

Name:	us-gaap_LitigationStatusAxis=pke_InsuranceCarrierOoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_LitigationStatusAxis=pke_TwoInsuranceCarriersMember
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Note 11 - Contingencies (Details Textual) (USD $)	3 Months Ended			9 Months Ended
Note 11 - Contingencies (Details Textual) (USD $)	Nov. 30, 2014	Dec. 01, 2013	Feb. 26, 2012	Nov. 30, 2014	Dec. 01, 2013	Mar. 02, 2014
Loss Contingency [Abstract]
Liability for Asbestos and Environmental Claims, Net	$ 0			$ 0		$ 0
Number of Sites of Company or Subsidiaries That Have Been Named for Potential Environmental Remediation Liability				4
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				3
Litigation Settlement, Expense	$ 1,000us-gaap_LitigationSettlementExpense	$ 1,000us-gaap_LitigationSettlementExpense		$ 25,000us-gaap_LitigationSettlementExpense	$ 20,000us-gaap_LitigationSettlementExpense
Number of Insurance Carriers				2pke_NumberOfInsuranceCarriers
Number of Insurance Carriers That Have Filed Answers to Lawsuit			3
Insurance Carrier One [Member]
Loss Contingency [Abstract]
Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers			45.00%
Two Insurance Carriers [Member]
Loss Contingency [Abstract]
Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers				100.00%