Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Note 2 - Business Segment Reporting Note 4 - Revenue Recognition Income tax expense Income tax expense ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 5 - Inventories ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 7 - Goodwill us-gaap_RestrictedCashAndCashEquivalents Restricted cash Transferred at Point in Time [Member] Trading Arrangements, by Individual [Table] Note 8 - Stock-based Compensation Material Terms of Trading Arrangement [Text Block] Note 9 - Earnings per Share Note 10 - Debt Note 11 - Leases Note 12 - Cash, Cash Equivalents, and Restricted Cash Note 15 - Noncontrolling Interest Minimum [Member] Note 16 - Accumulated Other Comprehensive Loss Note 2 - Business Segment Reporting - Schedule of Segment Reporting (Details) Statistical Measurement [Domain] Note 4 - Revenue Recognition - Revenues by Revenue Class (Details) Maximum [Member] Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details) Note 5 - Inventories - Schedule of Inventory (Details) Note 7 - Goodwill - Goodwill (Details) Note 8 - Stock-based Compensation - Stock-based Compensation Expense (Details) Note 8 - Stock-based Compensation - Restricted Stock Activity (Details) us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable Note 9 - Earnings Per Share - Schedule of Earnings Per Share (Details) Note 10 - Debt - Debt by Type (Details) Note 11 - Leases - Lease Costs (Details) Note 11 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) Depreciation and amortization us-gaap_CostDepreciationAmortizationAndDepletion Note 11 - Leases - Weighted-average Lease Terms and Discount Rates (Details) Note 11 - Leases - Supplemental Cash Flow Information Related to Leases (Details) Note 11 - Leases - Maturities of Lease Liabilities (Details) Labor us-gaap_CostDirectLabor Note 12 - Cash, Cash Equivalents, and Restricted Cash - Summary of Cash, Cash Equivalents and Restricted Cash (Details) Note 15 - Noncontrolling Interest - Activity of Non-controlling Interest (Details) Note 16 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) Materials us-gaap_CostDirectMaterial Notes To Financial Statements Notes To Financial Statements [Abstract] us-gaap_SecuredDebt Secured Debt us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities Accrued compensation and payroll taxes Salaries and wages us-gaap_LaborAndRelatedExpense us-gaap_LesseeFinanceLeaseDiscountRate Lessee, Finance Lease, Discount Rate Weighted Average [Member] us-gaap_IncreaseDecreaseInInventories Inventories us-gaap_SharesOutstanding Balances (in shares) Balances (in shares) Letter of Credit [Member] Segment Reporting [Text Block] Segment Reporting [Table Text Block] Award Type [Axis] Adjustments to reconcile net income to net cash provided by operating activities us-gaap_Liabilities Liabilities Consolidation Items [Axis] Stock-based compensation expense us-gaap_AllocatedShareBasedCompensationExpense us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Segment Reporting [Table] us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses us-gaap_ShareBasedCompensation Stock-based compensation expense Selling expense Selling expenses Consolidation Items [Domain] Lessee, Lease, Description [Table] Share-Based Payment Arrangement [Text Block] Changes in operating assets and liabilities us-gaap_IncreaseDecreaseInAccountsPayable Accounts payable Restricted cash us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net increase in cash, cash equivalents and restricted cash us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents Cash, cash equivalents and restricted cash shown in the statement of cash flows Effect of exchange rate changes on cash, cash equivalents and restricted cash us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash, cash equivalents and restricted cash - beginning of period Cash, cash equivalents and restricted cash - end of period Statement [Table] us-gaap_LinesOfCreditCurrent Line of Credit, Current Credit Facility [Axis] Operating cash outflows from operating leases Credit Facility [Domain] us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity Line of Credit Facility, Current Borrowing Capacity Revolving Credit Facility [Member] Prepaid expenses us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate Operating leases liabilities Finance leases liabilities Financing cash outflows from finance leases us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Lender [Domain] Lender Name [Axis] Redeemable Noncontrolling Interest [Table Text Block] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Outstanding, weighted average price (in dollars per share) Outstanding, weighted average price (in dollars per share) us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity Line of Credit Facility, Remaining Borrowing Capacity us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod Granted (in shares) Granted, weighted average price (in dollars per share) Long-Term Debt, Type [Axis] Fair value adjustment (accretion to redemption value) Product and Service [Domain] Product and Service [Axis] us-gaap_LineOfCredit Long-Term Line of Credit Ownership [Axis] us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization Accumulated depreciation and amortization Ownership [Domain] Consolidated Entities [Axis] us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization Property and Equipment - gross Consolidated Entities [Domain] us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Thereafter, operating leases us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total lease payments, operating leases us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables Unbilled accounts receivable Finance leases Operating leases Fiscal 2027, operating leases Fiscal 2031, operating leases us-gaap_ProceedsFromIssuanceOfDebt Proceeds from Issuance of Debt us-gaap_OperatingLeaseExpense Operating Lease, Expense Fiscal 2026 (remainder of fiscal year), operating leases Assets [Abstract] Fiscal 2029, operating leases Fiscal 2028, operating leases Statement [Line Items] Fiscal 2030, operating leases Common stock, issued (in shares) Common stock, outstanding (in shares) Award Type [Domain] Common stock, authorized (in shares) Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Common stock, $.01 par value, authorized 50,000 shares; 8,123 issued and outstanding at April 30, 2026 and 8,122 at January 31, 2026 Amortization of ROU assets Schedule of Inventory, Current [Table Text Block] Gulf Insulation Group [Member] Represents Gulf Insulation Group. Trade accounts payable Total lease liabilities, finance leases Total finance lease liabilities Short-Term Debt, Type [Domain] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements ppih_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriod Vested and issued (in shares) The number of equity-based payment instruments, excluding stock (or unit) options, that vested and issued during the reporting period. us-gaap_TableTextBlock Notes Tables Comprehensive Income (Loss) Note [Text Block] Proceeds from revolving credit lines Proceeds from Lines of Credit Thereafter, finance leases Short-Term Debt, Type [Axis] us-gaap_ComprehensiveIncomeNetOfTax Total comprehensive income attributable to common stock Finance lease liability long-term us-gaap_FinanceLeaseLiabilityPaymentsDue Total lease payments, finance leases Loans Payable [Member] Finance lease liability short-term us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount Less: amount representing interest, finance leases Fiscal 2029, finance leases Amount attributable to non-controlling interest Amount of other increase (decrease) in additional paid in capital (APIC) resulting from reclassification to non-controlling interest. Fiscal 2028, finance leases Fiscal 2031, finance leases Short-term debt Short-term debt Fiscal 2030, finance leases Concentration Risk Type [Axis] Other accrued liabilities Fiscal 2027, finance leases Interest on lease liabilities Operating cash outflows from finance leases Related Party [Member] Accrued compensation and payroll taxes Fiscal 2026 (remainder of fiscal year), finance leases Commissions and management incentives payable Long-term finance obligations Long-Term Debt and Lease Obligation, Noncurrent Amount of long-term debt and lease obligation, classified as noncurrent. us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less: amount representing interest, operating leases Operating lease liability long-term Total lease liabilities, operating leases Total operating lease liabilities Operating lease liability short-term JP Morgan Chase Bank [Member] Represents JP Morgan Chase Bank. PNC Bank [Member] Represents PNC Bank. Proceeds from other financing activities Amount of cash inflow from financing activity, classified as other. ppih_PaymentForOtherFinancingActivity Payments of other financing activities Amount of cash outflow from financing activity, classified as other. Accounts Receivable [Member] Concentration Risk Type [Domain] Goodwill [Text Block] Long-Term Debt, Excluding Current Maturities us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment Proceeds from Sale of Property, Plant, and Equipment Total long-term debt us-gaap_LongTermDebt Offsetting Assets [Table] us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Statement of Stockholders' Equity [Abstract] us-gaap_FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Statement of Comprehensive Income [Abstract] Statement of Cash Flows [Abstract] Long-Term Debt, Type [Domain] Stockholders' equity Equity Components [Axis] Revolving Credit Lines Used by Egypt Subsidiaries [Member] Represents information related to revolving credit lines used by Egypt subsidiaries. Equity Component [Domain] Perma-Pipe Canada, Ltd [Member] Information by business combination or series of individually immaterial business combinations. Accumulated Foreign Currency Adjustment Attributable to Parent [Member] AOCI Attributable to Parent [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Provision on uncollectible accounts Revolving Lines, United Arab Emirates [Member] Revolving Lines, United Arab Emirates Revolving Lines, Egypt [Member] Revolving Lines, Egypt Revolving Lines, Saudi Arabia [Member] Revolving Lines, Saudi Arabia Deferred tax assets us-gaap_DeferredIncomeTaxAssetsNet Fixed assets acquired under finance leases - non-cash Other costs of sales us-gaap_OtherCostOfOperatingRevenue Deferred compensation liabilities Total cost of sales Cost of sales Stock-based compensation expense Deferred tax liabilities Fair Value Disclosures [Text Block] Renewal of Revolving Credit Lines Used by Saudi Arabian Subsidiary [Member] Represents revolving credit lines used by Saudi Arabian subsidiary. Supplemental cash flow information Liabilities, Current [Abstract] Non-cash interest expense us-gaap_LiabilitiesCurrent Total current liabilities us-gaap_LettersOfCreditOutstandingAmount Letters of Credit Outstanding, Amount Secured Overnight Financing Rate (SOFR) [Member] us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent Long-Term Debt and Lease Obligation, Current Trade accounts receivable, less allowance for credit losses of $1,564 at April 30, 2026 and $1,571 at January 31, 2026 Customer Concentration Risk [Member] Lease, Cost [Table Text Block] Revenue Benchmark [Member] Accumulated other comprehensive loss General and administrative expenses General and administrative expenses Income before income tax us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income before income taxes Promissory Note [Member] Promissory note. Additional paid-in capital us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Debt Disclosure [Text Block] us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) Noncontrolling Interest Disclosure [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Capital expenditures Distributions to redeemable non-controlling interest holders us-gaap_MinorityInterestOwnershipPercentageByParent Subsidiary, Ownership Percentage, Parent Long-term debt Mortgages [Member] us-gaap_LineOfCreditFacilityCollateralFeesAmount Line of Credit Facility, Collateral Fees, Amount us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Noncontrolling Interest [Table] Current assets us-gaap_DebtWeightedAverageInterestRate Debt, Weighted Average Interest Rate Schedule of Debt [Table Text Block] us-gaap_AssetsCurrent Total current assets Shares issued, net of shares used for tax withholding (in shares) us-gaap_GrossProfit Gross profit Joint Venture [Member] Relating to the Joint Venture. Goodwill [Table] Debt Instrument, Name [Domain] Fair Value Measurement Inputs and Valuation Techniques [Table] us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage Related and Nonrelated Parties [Axis] U A E Dirhams [Member] Represents U.A.E. Dirhams. Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] Non-controlling interest Redeemable noncontrolling interest balance Redeemable noncontrolling interest balance Operating activities Investing activities us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Financing activities us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities us-gaap_PaymentsOfDebtIssuanceCosts Debt issuance costs us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by financing activities ppih_NumberOfMajorCustomers Number of Major Customers Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. One Customer [Member] Represents information pertaining to one customer. Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Transferred at Point in Time Using Input Method [Member] Represents information pertaining to transfers at a point in time using an input method. Specialty Piping Systems And Coating [Member] Represents information pertaining to Specialty Piping Systems and Coating. Sales by product, percent Represents the percentage of revenue from contracts with customers that is attributable to a specified product or service. Operating Segments [Member] Transferred at Point in Time Using Output Method [Member] Represents information pertaining to transfers at a point in time using an output method. Accounting Policies [Abstract] us-gaap_UndistributedEarningsOfForeignSubsidiaries Undistributed Earnings of Foreign Subsidiaries Accounting Standards Update and Change in Accounting Principle [Text Block] Allowance for doubtful accounts us-gaap_UnamortizedDebtIssuanceExpense Unamortized debt issuance costs Unbilled Revenues [Member] Income Statement [Abstract] Change in drafts payable us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Net income attributable to common stock Net income attributable to common stock Net income attributable to common stock ppih_LineOfCreditFacilityCashCollateralMargin Line of Credit Facility, Cash Collateral Margin The cash collateral margin that must be maintained as part of the line of credit. Interest expense, net us-gaap_InterestIncomeExpenseNet Interest expense, net Accumulated Other Comprehensive Income (Loss) [Table] Goodwill, foreign exchange change effect us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage Fixed assets acquired - non-cash Income Tax Disclosure [Text Block] Restricted Stock [Member] Accounting Standards Update and Change in Accounting Principle [Table] Related and Nonrelated Parties [Domain] us-gaap_DeferredFinanceCostsNet Debt Issuance Costs, Net Costs incurred on uncompleted contracts Costs incurred on uncompleted contracts related to percentage of completion Costs in excess of billings, net Costs in excess of billings, net Costs in excess of billings, net related to percentage of completion Less billings to date Billings to date related to percentage of completion ppih_EarnedRevenue Earned revenue Amount of earned revenue. Estimated earnings Estimated earnings related to percentage of completion us-gaap_RepaymentsOfLinesOfCredit Repayments of Lines of Credit Payments of debt on revolving credit lines Common Stock Outstanding [Member] Relating to common stock outstanding. Land and Buildings in Lebanon, Tennessee [Member] Represents the sale leaseback transaction in connection with the land and buildings in Lebanon, Tennessee. Statement of Financial Position [Abstract] Finance Lease Obligations [Member] Represents finance lease obligation. us-gaap_LiabilitiesNoncurrent Total long-term liabilities us-gaap_AssetsNoncurrent Total long-term assets Long-term assets Cash income taxes paid us-gaap_LesseeFinanceLeaseRenewalTerm1 Lessee, Finance Lease, Renewal Term (Year) us-gaap_LesseeFinanceLeaseTermOfContract1 Lessee, Finance Lease, Term of Contract (Year) Revolving Lines, North America [Member] Represents information pertaining to revolving lines in North America. us-gaap_RepaymentsOfSecuredDebt Repayments of Secured Debt Finance leases (Year) Liabilities, Noncurrent [Abstract] Revolving Line, United States [Member] Represents information pertaining to the revolving line in the United States. Other long-term assets Document Type Canadian Mortgage Note [Member] Represents information pertaining to a mortgage note from a bank in Canada, secured by a Canadian manufacturing facility. Operating expenses Document Information [Line Items] Document Quarterly Report us-gaap_ConcentrationRiskPercentage1 Concentration Risk, Percentage EIBOR [Member] Represents information pertaining to the Emirates Inter Bank Offered Rate. us-gaap_LesseeOperatingLeaseTermOfContract Lessee, Operating Lease, Term of Contract (Year) Foreign Revolving Lines [Member] Represents information pertaining to foreign revolving credit facilities. Document Information [Table] Operating leases (Year) us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment Dilutive effect of equity compensation plans (in shares) Entity Interactive Data Current Document Transition Report us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding Diluted (in shares) Weighted average common shares outstanding assuming full dilution (in shares) Mortgage Note Secured by Tennessee Manufacturing Facility [Member] Represents information pertaining to a mortgage note secured by a manufacturing facility in Lebanon, Tennessee. Total operating expenses us-gaap_OperatingExpenses Total operating expenses Earnings per share attributable to common stock us-gaap_WeightedAverageNumberOfSharesOutstandingBasic Basic (in shares) Antidilutive Security, Excluded EPS Calculation [Table] Basic (in dollars per share) Basic (in dollars per share) Effective Income Tax Rate Reconciliation [Table] Restrictions on Cash and Cash Equivalents [Table Text Block] ppih_SaleLeasebackTransactionAnnualRentalPaymentsAmount Sale Leaseback Transaction, Annual Rental Payments, Amount Amount of cash outflow from leaseback transactions. Document Fiscal Period Focus Customer [Domain] Document Fiscal Year Focus Depreciation and amortization us-gaap_DepreciationAndAmortization Amendment Flag Common Stock [Member] Goodwill Goodwill Goodwill Document Period End Date us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding Outstanding, aggregate intrinsic value Long-Lived Asset, Class [Domain] Legal Entity [Axis] Operating lease costs Short-term lease costs (1) us-gaap_LeaseCost Total Lease costs Business Combination [Domain] Entity File Number Entity Tax Identification Number Business Combination [Axis] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table] Entity [Domain] Entity Central Index Key Entity Registrant Name Currency translation adjustments Foreign currency translation adjustment Entity Current Reporting Status Entity Incorporation, State or Country Code Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Current Fiscal Year End Date Entity Filer Category Entity Shell Company ppih_IncreaseDecreaseInCustomerDeposits1 Customers' deposits The increase (decrease) during the period in customer deposits. Entity Emerging Growth Company Entity Small Business us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax Tax effect of currency translation adjustments Customers' deposits The current portion of customer deposits. Income from operations us-gaap_OperatingIncomeLoss Income from operations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] us-gaap_ContractWithCustomerAssetNet Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts Entity Address, State or Province Inventory, Current [Table] Entity Address, City or Town Retained earnings Entity Address, Address Line One Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Costs and estimated earnings in excess of billings on uncompleted contracts City Area Code us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet Other assets and liabilities Long-term Debt, Current Maturities, Excluding North American Revolving Line Long-term Debt, Current Maturities, Excluding North American Revolving Line Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current, excluding north american revolving lines of credit. Local Phone Number Entity Address, Postal Zip Code Revenue from Contract with Customer [Text Block] Cash and Cash Equivalents Disclosure [Text Block] Title of 12(b) Security Security Exchange Name Unbilled accounts receivable Unbilled Receivables, Current Trading Symbol Class of Stock [Axis] Base Rate [Member] Variable Rate [Axis] Variable Rate [Domain] Entity Common Stock, Shares Outstanding Other comprehensive income (loss) Earnings Per Share [Text Block] Other current assets Less: Net income attributable to non-controlling interest Net income attributable to redeemable non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Revolving Credit Lines Used by Saudi Arabian Subsidiary [Member] Represents revolving credit lines used by Saudi Arabian subsidiary. Net income us-gaap_ProfitLoss Net income Deferred tax expense us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable Income taxes payable Lessee, Operating and Finance Leases [Text Block] The entire disclosure for operating and finance leases of lessee. Other general and administrative expense us-gaap_OtherGeneralAndAdministrativeExpense Income taxes payable Finance Leases Assets [Member] Represents information pertaining to finance leases assets. Supplemental Balance Sheet Information Related to Leases [Table Text Block] Tabular disclosure of supplemental balance sheet information related to leases. Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Weighted average common shares outstanding Finance and Operating Lease, Liability, Maturity [Table Text Block] Tabular disclosure of finance and operating lease liability maturity. Weighted-average Lease Terms and Discount Rates [Table Text Block] Tabular disclosure of weighted-average lease terms and discount rates. Supplemental Cash Flow Information Related Leases [Table Text Block] Tabular disclosure of supplemental cash flow information related leases. Common stock, par value (in dollars per share) Other expense, net us-gaap_OtherNonoperatingIncomeExpense Other expense, net ppih_LineOfCreditFacilityCommissionFee Line of Credit Facility, Commission Fee The commission fee payable on the line of credit. Long-Lived Asset, Class [Axis] ppih_LesseeFinanceLeaseAnnualRentIncreasePercentage Lessee, Finance Lease, Annual Rent Increase, Percentage The percentage of annual rent increase on the finance lease of the lessee. ppih_LesseeFinanceLeaseNumberOfOptionsToExtend Lessee, Finance Lease, Number of Options to Extend The number of options to extend the finance lease of the lessee. us-gaap_Assets Assets Total assets Cash and cash equivalents Cash and cash equivalents us-gaap_AllowanceForDoubtfulAccountsReceivable Accounts Receivable, Allowance for Credit Loss us-gaap_CommonStockCapitalSharesReservedForFutureIssuance Common Stock, Capital Shares Reserved for Future Issuance (in shares) Diluted (in dollars per share) Diluted (in dollars per share) us-gaap_ContractWithCustomerLiability Contract with Customer, Liability Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts Customer [Axis] Billings in excess of costs and estimated earnings on uncompleted contracts us-gaap_DepreciationDepletionAndAmortization Depreciation and amortization Accounts and Financing Receivables [Table] Receivables Billing Status [Domain] Disposal Group Name [Domain] Schedule of Assumptions for Long-Duration Contracts by Product and Guarantee [Table Text Block] Billing Status, Type [Axis] Cash interest paid Inventory Disclosure [Text Block] Less: Comprehensive income attributable to non-controlling interests Finished goods us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest Comprehensive income Product [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber Outstanding (in shares) Outstanding (in shares) Inventories Inventories Disposal Group Name [Axis] Revolving Credit Lines Used by Middle Eastern Subsidiaries, 1 [Member] Represents the first revolving credit line used by the Company's Middle Eastern subsidiaries. us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration Disposal Group, Including Discontinued Operation, Consideration Revolving Credit Lines Used by Middle Eastern Subsidiaries, 2 [Member] Represents the second revolving credit line used by the Company's Middle Eastern subsidiaries. Raw materials Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] us-gaap_StockholdersEquity Total stockholders' equity Balance Balance us-gaap_InventoryGross Subtotal us-gaap_IncreaseDecreaseInContractWithCustomerLiability Billings in excess of costs and estimated earnings on uncompleted contracts Goodwill [Table Text Block] Work in process us-gaap_IncreaseDecreaseInContractWithCustomerAsset Costs and estimated earnings in excess of billings on uncompleted contracts Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] us-gaap_InventoryValuationReserves Less allowance us-gaap_FinanceLeaseRightOfUseAsset Property and Equipment - net Operating lease right-of-use asset Operating lease ROU assets Other long-term liabilities ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Net sales Sales by product Net sales Commitments and contingencies (See Part II, Item 1)