Document And Entity Information Note To Financial Statement Details Textual Note 3 - Shareholders' Equity Provision for income taxes Provision for income taxes Options exercised (in shares) Exercised, options (in shares) Note 5 - Inventories ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 7 - Accrued Liabilities us-gaap_EquityMethodInvestmentDividendsOrDistributions Proceeds from Equity Method Investment, Distribution ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 8 - Basic and Diluted Earnings Per Common Share Trading Arrangements, by Individual [Table] Note 10 - Segments Reporting us-gaap_IncomeLossAttributableToParent Income before provision for income taxes Material Terms of Trading Arrangement [Text Block] Note 11 - Financial Information About Geographic Areas Related and Nonrelated Parties [Axis] Note 13 - Leases Note 3 - Shareholders' Equity - Restricted Stock Activity (Details) Note 3 - Shareholders' Equity - Information About Stock Options (Details) Note 5 - Inventories - Inventory (Details) Equity investment in unconsolidated affiliate us-gaap_StockRepurchasedAndRetiredDuringPeriodShares Stock Repurchased and Retired During Period, Shares (in shares) Common stock repurchased and retired (in shares) Note 7 - Accrued Liabilities - Accrued Liabilities (Details) Note 8 - Basic and Diluted Earnings Per Common Share - Reconciliation of Net Income and Number of Shares Used in Computations of Basic and Diluted EPS (Details) Note 10 - Segments Reporting - Segment Information (Details) Equity in income of unconsolidated affiliate Income (Loss) from Equity Method Investments Equity in income of unconsolidated affiliate Note 10 - Segments Reporting - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details) Note 10 - Segments Reporting - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable, net Note 11 - Financial Information About Geographic Areas - Consolidated Net Sales and Long-lived Asset Information by Geographic Area (Details) us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Accounts payable and accrued liabilities Note 13 - Leases - Future Minimum Lease Payment (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Cash Flows From Operating Activities: Cash Flows From Investing Activities: us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash and cash equivalents provided by (used in) operating activities Raw materials Cash Flows From Financing Activities: Work in process us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash and cash equivalents used in investing activities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash and cash equivalents used in financing activities Finished goods Alpha Pro Tech Engineered Products [Member] Alpha ProTech Engineered Products [Member] apt_ExpenseToAcquireInventory Expense To Acquire Inventory Purchases from our Joint venture. apt_CumulativeEquityInIncomeOfUnconsolidatedAffiliate Cumulative Equity In Income Of Unconsolidated Affiliate CumulativeEquityInIncomeOfUnconsolidatedAffiliate Building Supply [Member] Building Supply [Member] Disposable Protective Apparel [Member] Disposable Protective Apparel [Member] Exercised, weighted average exercise price (in dollars per share) apt_TotalConsolidatedAssets Assets Total consolidated assets Operating Segments [Member] Accounting Policies [Abstract] Segments [Domain] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Accounting Standards Update and Change in Accounting Principle [Text Block] Interest income, net Long-lived assets us-gaap_NoncurrentAssets Segments [Axis] Income Statement [Abstract] us-gaap_IncreaseDecreaseInInventories Inventory, net us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Segment Reporting [Text Block] Income Tax Contingency [Table] Net income Net income Segment net income Adjustments to reconcile net income to net cash and cash equivalents provided by (used in) operating activities: Award Type [Axis] Segment Reporting [Table Text Block] us-gaap_Liabilities Total liabilities Plan Name [Axis] Plan Name [Domain] Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and shareholders' equity us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense Consolidation Items [Axis] us-gaap_AreaOfRealEstateProperty Area of Real Estate Property (Square Foot) us-gaap_IncreaseDecreaseInPrepaidExpense Prepaid expenses Segment Reporting [Table] Condensed Balance Sheet Statement [Table] Selling, general and administrative Selling, general and administrative Stock-based compensation Subsequent Event [Member] Consolidation Items [Domain] Reportable Geographical Components [Member] Manufacturing Coated Material and Sewing Proprietary Disposable Protective Apparel [Member] Indicates a facility used for manufacturing coated material and sewing proprietary disposable protective apparel. Sewing Proprietary Disposable Protective Apparel [Member] Indicates a facility used for sewing proprietary disposable protective apparel. Manufacturing Building Products [Member] Indicates a facility used for manufacturing building products. Income Tax Disclosure [Text Block] Lessee, Lease, Description [Table] Restricted Stock [Member] Manufacturing Of Building Products [Member] Indicates a facility used for manufacturing of building products. Changes in operating assets and liabilities: Accounting Standards Update and Change in Accounting Principle [Table] Reclassification [Table] us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital Proceeds from Equity Method Investment, Distribution, Return of Capital Supplemental disclosure of non-cash transactions: us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Increase (decrease) in cash and cash equivalents apt_TariffRefunds Tariff Refunds Amount of refunds received related to previously paid tariffs. Related and Nonrelated Parties [Domain] Related Party Transaction [Table] Related Party Transactions Disclosure [Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents, beginning of the period Cash and cash equivalents, end of the period Statement [Table] us-gaap_IncreaseDecreaseInDueFromRelatedParties Accounts receivable, related party Prepaid expenses Other income: us-gaap_EquityMethodInvestments Equity Method Investments Statement of Financial Position [Abstract] us-gaap_NonoperatingIncomeExpense Total other income Other income us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment Equity Method Investment, Other than Temporary Impairment us-gaap_EquityMethodInvestmentOwnershipPercentage Equity Method Investment, Ownership Percentage us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Outstanding, shares (in shares) Outstanding (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Outstanding, weighted average grant date price (in dollars per share) Outstanding, weighted average grant date price (in dollars per share) Nature of Operations [Text Block] Granted to employees and directors, shares (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Granted to employees and directors, weighted average grant date price (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Canceled/expired/forfeited, shares (in shares) Condensed Statement of Comprehensive Income [Table] Product and Service [Domain] Product and Service [Axis] Vested, weighted average grant date price (in dollars per share) 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 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested, shares (in shares) us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive Thereafter The2004 Plan Member Represents information regarding the 2004 plan. us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total future minimum lease payments us-gaap_PaymentsForRepurchaseOfCommonStock Repurchase of common stock Payments for Repurchase of Common Stock us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent Operating Lease, Weighted Average Discount Rate, Percent dei_DocumentType Document Type Operating expenses: Document Information [Line Items] dei_DocumentQuarterlyReport Document Quarterly Report us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths Remaining six months of 2026 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive 2030 us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Operating Lease, Weighted Average Remaining Lease Term (Year) Document Information [Table] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant us-gaap_OperatingLeaseExpense Operating Lease, Expense us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber Options exercisable, options (in shares) dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice Options exercisable, weighted average exercise price (in dollars per share) Harmony [Member] Information by name of investment. Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Assets us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Options outstanding, options (in shares) Options outstanding, options (in shares) us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree 2028 dei_DocumentTransitionReport Document Transition Report Commitments and Contingencies Disclosure [Text Block] Diluted weighted average common shares outstanding (in shares) Diluted weighted average common shares outstanding (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Options outstanding, weighted average exercise price (in dollars per share) Options outstanding, weighted average exercise price (in dollars per share) us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 2027 Statement [Line Items] us-gaap_OperatingExpenses Total operating expenses us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour 2029 Common Stock, Shares, Issued (in shares) Common Stock, Shares, Outstanding (in shares) Balance (in shares) Balance (in shares) Award Type [Domain] us-gaap_CommonStockSharesAuthorized Common Stock, Shares Authorized (in shares) Financial Information about Geographic Areas [Text Block] Entire disclosure for financial information about geographic areas. Add: dilutive effect of common stock options (in shares) Basic weighted average common shares outstanding (in shares) us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 Share Repurchase Program, Remaining Authorized, Amount us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Basic earnings per common share (in dollars per share) Schedule of Accrued Liabilities [Table Text Block] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Common stock, $.01 par value: 50,000,000 shares authorized; 10,120,851 and 10,131,565 shares outstanding as of June 30, 2026 and December 31, 2025, respectively Title and Position [Domain] Schedule of Inventory, Current [Table Text Block] Accounts payable us-gaap_FinanceLeaseLiability Finance Lease, Liability, Total us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Commissions and bonuses payable and general accrued liabilities Comprehensive Income (Loss) Note [Text Block] Document Fiscal Period Focus Document Fiscal Year Focus us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income Investment, Name [Domain] Amendment Flag Common Stock [Member] Payroll expenses and taxes payable Goodwill Subsequent Events [Text Block] Accrued liabilities Total accrued liabilities dei_DocumentPeriodEndDate Document Period End Date Nonrelated Party [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Legal Entity [Axis] Related Party [Member] Significant Accounting Policies [Text Block] Amortization of right-of-use assets us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less imputed interest dei_EntityFileNumber Entity File Number Lease liabilities, net of current portion Proceeds from exercise of stock options The cash inflow from or (outflow of) cash for stock options exercised during the period. Entity Tax Identification Number Total lease liabilities us-gaap_OperatingLeaseLiability Operating Lease, Liability, Total 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 us-gaap_ProceedsFromSaleOfProductiveAssets Proceeds from Sale of Productive Assets Current Fiscal Year End Date Capitalization, Equity [Table] dei_EntityFilerCategory Entity Filer Category dei_EntityShellCompany Entity Shell Company dei_EntityEmergingGrowthCompany Entity Emerging Growth Company us-gaap_EquityMethodInvestmentAggregateCost Equity Method Investment, Aggregate Cost dei_EntitySmallBusiness Entity Small Business us-gaap_OperatingIncomeLoss Income from operations apt_NumberOfStoresOwned Number Of Stores Owned Represents the number of stores owned. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] apt_NumberOfStoresRented Number Of Stores Rented Represents the number of stores rented. Net non-cash changes to operating leases The amount of noncash changes to operating leases. Entity Address, State or Province Statement of Stockholders' Equity [Abstract] Entity Address, City or Town Inventory, Current [Table] Statement of Comprehensive Income [Abstract] Retained earnings Entity Address, Address Line One Statement of Cash Flows [Abstract] dei_CityAreaCode City Area Code us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Treasury stock excise tax Other comprehensive income (loss) dei_LocalPhoneNumber Local Phone Number Entity Address, Postal Zip Code us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Entity Address, Country Shareholders' equity: Title of 12(b) Security Equity Components [Axis] Security Exchange Name Trading Symbol us-gaap_IncreaseDecreaseInOperatingLeaseLiability Lease liabilities Maple Industries and Associates [Member] Maple industries and associates [member Class of Stock [Axis] Equity Component [Domain] AOCI Attributable to Parent [Member] Entity Common Stock, Shares Outstanding (in shares) Additional Paid-in Capital [Member] Retained Earnings [Member] Earnings Per Share [Text Block] Cost of goods sold, excluding depreciation and amortization Cost of goods sold Chief Executive Officer [Member] Property and equipment, net INDIA Subsequent Event Type [Domain] Subsequent Event [Table] Subsequent Event Type [Axis] Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] us-gaap_CommonStockParOrStatedValuePerShare Common Stock, Par or Stated Value Per Share (in dollars per share) Investment, Name [Axis] Stock-based compensation expense Share-Based Payment Arrangement, Option, Activity [Table Text Block] us-gaap_Assets Total assets Deferred income tax liabilities, net Cash and cash equivalents Accounts Payable and Accrued Liabilities Disclosure [Text Block] Geographical [Domain] Geographical [Axis] us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Share-Based Payment Arrangement, Option [Member] Current liabilities: us-gaap_CommonStockCapitalSharesReservedForFutureIssuance Common Stock, Capital Shares Reserved for Future Issuance us-gaap_LiabilitiesCurrent Total current liabilities Diluted earnings per common share (in dollars per share) Accounts receivable Equity Method Investments and Joint Ventures Disclosure [Text Block] Depreciation and amortization Depreciation and amortization us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation Treasury stock excise tax Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Legal Entity Type of Counterparty [Domain] Legal Entity of Counterparty, Type [Axis] Inventory Disclosure [Text Block] Other Commitments [Table] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Shareholders' Equity and Share-Based Payments [Text Block] Inventories, net Total inventory apt_OtherComprehensiveIncomeLossForeignCurrencyTranslationGainLossAdjustment Other comprehensive income - foreign currency translation gain (loss) Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity. Incentive Plan 2020 [Member] Represents the 2020 incentive plan. Additional paid-in capital us-gaap_StockholdersEquity Total shareholders' equity Balance Balance Canceled/expired/forfeited, weighted average grant date price (in dollars per share) us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment Lessee, Operating Leases [Text Block] Stock, Class of Stock [Table] UNITED STATES Non-US [Member] us-gaap_StockRepurchasedAndRetiredDuringPeriodValue Common stock repurchased and retired Right-of-use assets Operating Lease, Right-of-Use Asset Options exercised us-gaap_AssetsCurrent Total current assets us-gaap_NumberOfStores Number of Stores ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Revenues Net sales Segment sales us-gaap_GrossProfit Gross profit ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Commitments and contingincies