Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased Share Repurchase Program, Authorized, Number of Shares Note 3 - Marketable Securities Income tax provision (Note 9) Income Tax Expense (Benefit) us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised Stock options exercised (in shares) Note 4 - Inventories Fair Value Measurement Inputs and Valuation Techniques [Table] ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 5 - Leases ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 6 - Stock-based Compensation Trading Arrangements, by Individual [Table] Note 7 - Earnings Per Share Material Terms of Trading Arrangement [Text Block] Note 10 - Geographic Regions Note 3 - Marketable Securities - Summary of Available-for-sale Securities (Details) Financial Instrument [Axis] Note 3 - Marketable Securities - Summary of Unrealized Gains and Losses on Available-for-sale Securities (Details) Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Note 3 - Marketable Securities - Estimated Fair Value of Securities by Contractual Maturity (Details) Note 4 - Inventories - Summary of Inventories (Details) Gross unrealized losses Minimum [Member] Note 5 - Leases - Future Minimum Lease Payments (Details) Repurchase of treasury shares (in shares) Gross unrealized gains Note 5 - Leases - Schedule of Right-of-use Assets and Operating Lease Liabilities (Details) Statistical Measurement [Domain] Note 6 - Stock-based Compensation - Option Activity (Details) Maximum [Member] Note 7 - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) Note 10 - Geographic Regions - Financial Information by Geographic Region (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] us-gaap_TreasuryStockValue Less treasury stock, at cost Cash flows from operating activities: Cash flows from investing activities: us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Raw materials Cash flows from financing activities: Work-in-process us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash provided by investing activities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used in financing activities Finished goods Counterparty Name [Axis] us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Granted, weighted average exercise price (in dollars per share) Exercised, weighted average exercise price (in dollars per share) Accounting Policies [Abstract] Interest and other income Cash dividends Cash dividends us-gaap_LongTermPurchaseCommitmentAmount Long-Term Purchase Commitment, Amount Accounts receivable, allowance for doubtful accounts Financial Instruments [Domain] US Treasury and Government [Member] us-gaap_StockRepurchasedDuringPeriodShares Stock Repurchased During Period, Shares Income Statement [Abstract] Counterparty Name [Domain] us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) us-gaap_ContractualObligationDueInSecondYear Contractual Obligation, to be Paid, Year Two us-gaap_ContractualObligationDueInThirdYear Contractual Obligation, to be Paid, Year Three us-gaap_NumberOfOperatingSegments Number of Operating Segments Deferred income taxes Segment Reporting [Text Block] us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased Share Repurchase Program, Remaining Authorized, Number of Shares us-gaap_ContractualObligation Contractual Obligation us-gaap_TreasuryStockCommonShares Balance (in shares) Balance (in shares) Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Treasury Stock, Common [Member] Net earnings Net earnings Net earnings Net earnings Adjustments to reconcile net earnings to net cash provided by operating activities: us-gaap_Liabilities Total liabilities Plan Name [Axis] Plan Name [Domain] pke_StockRepurchaseProgramPercentageOfOutstandingSharesAuthorizedToBeRepurchased Stock Repurchase Program, Percentage of Outstanding Shares Authorized to be Repurchased The percent of outstanding stock authorized to be repurchased us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and shareholders' equity us-gaap_AreaOfLand Area of Land Segment Reporting [Table] Selling, general and administrative expenses us-gaap_ShareBasedCompensation Stock-based compensation Subsequent Event [Member] Lessee, Lease, Description [Table] Income Tax Disclosure [Text Block] Share-Based Payment Arrangement [Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Domain] North America [Member] Europe [Member] us-gaap_IncreaseDecreaseInOperatingCapital Changes in operating assets and liabilities Asia [Member] Supplemental cash flow information: us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Increase (decrease) in cash and cash equivalents us-gaap_TreasuryStockValueAcquiredCostMethod Repurchase of treasury shares Repurchase of treasury shares us-gaap_CommonStockDividendsPerShareCashPaid Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) Geographic Regions [Text Block] The entire disclosure for geographic regions. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Antidilutive Securities, Name [Domain] Statement [Table] pke_StockoldersEquityIncludingTreasuryStock Stockholders' Equity, Including Treasury Stock Total of all stockholders' equity (deficit), including treasury stock. us-gaap_OperatingLeasePayments Operating Lease, Payments Fair Value Hierarchy and NAV [Domain] Statement of Financial Position [Abstract] us-gaap_ContractualObligationDueInNextTwelveMonths Contractual Obligation, to be Paid, Year One Goodwill and other intangible assets Cash paid during the period for income taxes, net of refunds Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table Text Block] us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Other assets us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total undiscounted operating lease payments us-gaap_PaymentsForRepurchaseOfCommonStock Purchase of treasury stock us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent Operating Lease, Weighted Average Discount Rate, Percent dei_DocumentType Document Type Document Information [Line Items] Document Quarterly Report 2028 us-gaap_LesseeOperatingLeaseRenewalTerm Lessee, Operating Lease, Renewal Term (Year) us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Operating Lease, Weighted Average Remaining Lease Term (Year) Document Information [Table] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized us-gaap_OperatingLeaseExpense Operating Lease, Expense us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities [Axis] Diluted: 2027 Vested and exercisable (in shares) Net effect of dilutive options (in shares) dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) Vested and exercisable, weighted average exercise price (in dollars per share) Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] 2030 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Balance (in shares) Balance (in shares) Document Transition Report Diluted weighted average shares (in shares) Weighted average common shares outstanding for basic EPS (in shares) 2029 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Balance, weighted average exercise price (in dollars per share) Balance, weighted average exercise price (in dollars per share) Commitments and Contingencies Disclosure [Text Block] Statement [Line Items] Basic: Fair Value Hierarchy and NAV [Axis] 2031 Balance, aggregate intrinsic value us-gaap_CommonStockSharesOutstanding Common Stock, Shares, Outstanding pke_IncomeTaxExpenseBenefitDiscreteAmount Income Tax Expense (Benefit), Discrete Amount Represents the discrete income tax expense (benefit) during the period. Gains on Marketable Securities [Member] Gains on marketable securities. Basic weighted average shares (in shares) Losses on Marketable Securities [Member] Represents losses on marketable securities. Basic earnings per share (in dollars per share) Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Common stock Effective Income Tax Rate Reconciliation [Table] Debt Securities, Available-for-Sale [Table Text Block] Schedule of Inventory, Current [Table Text Block] us-gaap_ProceedsFromIssuanceOfCommonStock Proceeds from Issuance of Common Stock us-gaap_AccountsPayableCurrent Accounts payable us-gaap_PolicyTextBlockAbstract Accounting Policies Amortization of bond premium us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Document Fiscal Period Focus Document Fiscal Year Focus us-gaap_ComprehensiveIncomeNetOfTax Total comprehensive earnings Amendment Flag Common Stock [Member] Proceeds from sales and maturities of marketable securities Concentration Risk [Table] Subsequent Events [Text Block] Accrued liabilities dei_DocumentPeriodEndDate Document Period End Date Outstanding options, granted (in shares) Legal Entity [Axis] us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less imputed interest dei_EntityFileNumber Entity File Number Long-term operating lease liabilities (Note 5) Long-term operating lease liabilities Balance, weighted average remaining contractual term (Year) Entity Tax Identification Number Present value of operating lease payments Total operating lease liabilities Operating lease liabilities (Note 5) Operating lease liabilities Entity [Domain] Entity Central Index Key dei_EntityRegistrantName Entity Registrant Name dei_EntityCurrentReportingStatus Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Vested and exercisable, weighted average remaining contractual term (Year) dei_EntityFilerCategory Entity Filer Category dei_EntityShellCompany Entity Shell Company dei_EntityEmergingGrowthCompany Entity Emerging Growth Company Schedule of Right-of-use Assets and Operating Lease Liabilities [Table Text Block] Tabular disclosure of right-of-use assets and operating lease liabilities. dei_EntitySmallBusiness Entity Small Business Amortized cost basis us-gaap_OperatingIncomeLoss Earnings from operations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Other comprehensive earnings, net of tax: pke_LesseeSubleaseTermOfContract Lessee, Sublease, Term of Contract Term of lessee's sublease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Entity Address, State or Province Statement of Stockholders' Equity [Abstract] Entity Address, City or Town Marketable Securities [Table] Inventory, Current [Table] Statement of Comprehensive Income [Abstract] Thereafter Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Accumulated deficit Entity Address, Address Line One Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Statement of Cash Flows [Abstract] dei_CityAreaCode City Area Code The 2018 Stock Option Plan [Member] Represents the information pertaining to 2018 Stock Option Plan. Sublease in Tulsa, Oklahoma [Member] Represents a sublease in Tulsa, Oklahoma. dei_LocalPhoneNumber Local Phone Number Entity Address, Postal Zip Code Due in one year or less pke_LesseeSubleaseAnnualRentInitialFiveYears Lessee, Sublease, Annual Rent, Initial Five Years Amount of annual rent under sublease for the first five years of the lease. us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent Other comprehensive earnings pke_LesseeSubleaseRenewalTerm Lessee, Sublease, Renewal Term Term of lessee's sublease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Title of 12(b) Security Equity Components [Axis] Security Exchange Name Trading Symbol us-gaap_PaymentsOfStockIssuanceCosts Payments of Stock Issuance Costs us-gaap_ProceedsFromStockOptionsExercised Proceeds from exercise of stock options Class of Stock [Axis] Equity Component [Domain] Available-for-sale securities Fair Value, Inputs, Level 2 [Member] Leases with Renewal Options [Member] Information related to the leases with renewal options. Fair Value, Inputs, Level 3 [Member] AOCI Attributable to Parent [Member] Fair Value, Inputs, Level 1 [Member] Equity [Text Block] dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Additional Paid-in Capital [Member] Retained Earnings [Member] Earnings Per Share [Text Block] Cost of sales Unrealized loss on marketable securities, net of tax Unrealized holding gains arising during the period Property, plant and equipment, net Allowance for credit losses Subsequent Event Type [Domain] Scenario [Axis] Subsequent Event [Table] Scenario [Domain] Subsequent Event Type [Axis] Income taxes payable pke_PercentageOfStockOptionsExercisableOneYearFromDateOfGrant Percentage of Stock Options, Exercisable One Year From Date of Grant Percentage of stock options exercisable one year from date of grant. pke_PercentageOfStockOptionsExercisableOnEachSucceedingYearFromDateOfGrant Percentage of Stock Options Exercisable On Each Succeeding Year from Date of Grant Percentage of stock options exercisable on each succeeding year from the date of grant. pke_MaximumAggregateOfferingPriceOfCommonShares Maximum Aggregate Offering Price Of Common Shares The value of maximum aggregate offering price of common shares. Sale of Stock [Axis] At Market Offering Program [Member] Represents the at market offering program. Investments Classified by Contractual Maturity Date [Table Text Block] Vested and exercisable, aggregate intrinsic value us-gaap_CommonStockParOrStatedValuePerShare Common Stock, Par or Stated Value Per Share Stock-based compensation pke_PercentageOfLegalDefenseAndRemediationCostsAssociatedWithSitesReimbursedByInsuranceCarriers Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers Percentage of legal defense and remediation costs associated with sites reimbursed by insurance carriers. pke_NumberOfUnitsCoveredUnderGeneralLiabilityInsuranceCoverage Number of Units Covered Under General Liability Insurance Coverage Number of units covered under general liability insurance coverage. Shareholders' equity (Note 8) ArianeGroup SAS [Member] Represents ArianeGroup SAS. pke_NumberOfInsuranceCarriers Number of Insurance Carriers Number of insurance carriers. Sale of Stock [Domain] Share-Based Payment Arrangement, Option, Activity [Table Text Block] us-gaap_Assets Total assets Deferred income taxes (Note 9) Cash and cash equivalents Geographical [Domain] Geographical [Axis] Fair Value Disclosures [Text Block] Share-Based Payment Arrangement, Option [Member] Current liabilities us-gaap_LiabilitiesCurrent Total current liabilities Diluted earnings per share (in dollars per share) us-gaap_AccrualForEnvironmentalLossContingencies Accrual for Environmental Loss Contingencies Accounts receivable, less allowance for credit losses of $115 and $111, respectively Depreciation and amortization Marketable securities (Note 3) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod Outstanding options, terminated or expired (in shares) Inventory Disclosure [Text Block] Other Commitments [Table] Accumulated other comprehensive loss Terminated or expired, weighted average exercise price (in dollars per share) Inventories (Note 4) Inventory, Net us-gaap_PaymentsToAcquireMarketableSecurities Purchases of marketable securities Additional paid-in capital us-gaap_StockholdersEquity Total shareholders' equity Balance Balance Prepaid expenses and other current assets us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) us-gaap_PaymentsOfDividendsCommonStock Dividends paid us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property, plant and equipment Lessee, Operating Leases [Text Block] Stock, Class of Stock [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Current assets Operating right-of-use assets (Note 5) Operating right-of-use assets Stock options exercised us-gaap_AssetsCurrent Total current assets Other liabilities ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Sales Net sales us-gaap_GrossProfit Gross profit ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Commitments and Contingencies us-gaap_StockIssuedDuringPeriodSharesNewIssues Stock Issued During Period, Shares, New Issues