Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Note 6 - Fair Value of Marketable Securities Income tax provision (benefit) Employee option exercises (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Note 7 - Net Income (Loss) Per Common and Common Equivalent Share ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 8 - Commitments & Contingencies ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 10 - Inventories Trading Arrangements, by Individual [Table] Note 11 - Accrued Expenses Material Terms of Trading Arrangement [Text Block] Note 13 - Segment Reporting Note 14 - Income Taxes Note 6 - Fair Value of Marketable Securities - Marketable Securities Purchased (Details) Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Note 7 - Net Income (Loss) Per Common and Common Equivalent Share - Table of Both Basic and Diluted EPS (Details) Note 8 - Commitments & Contingencies - Maturity of Capitalized Lease Liabilities (Details) us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax Unrealized gain (loss) Minimum [Member] Note 10 - Inventories - Inventories (Details) Note 11 - Accrued Expenses - Accrued Expenses (Details) Statistical Measurement [Domain] Note 13 - Segment Reporting - Schedule of Segment Information (Details) Note 15 - Income Taxes - Enactment of the One Big Beautiful Bill Act - Modifications to FDII Expenses (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivables Cash flows from operating activities: Cash flows from investing activities: us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash (used in) operating activities Cash flows from financing activities: Business Description and Basis of Presentation [Text Block] us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities us-gaap_SharesIssuedPricePerShare Shares Issued, Price Per Share (in dollars per share) us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used in financing activities Counterparty Name [Axis] us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Rockland Trust Company [Member] Represents Rockland Trust Company. Change in Accounting Estimate [Table] Accounting Policies [Abstract] Segments [Domain] Accounting Standards Update and Change in Accounting Principle [Text Block] Segments [Axis] us-gaap_StockRepurchasedDuringPeriodShares Stock Repurchased During Period, Shares Leasehold improvements Income Statement [Abstract] us-gaap_IncreaseDecreaseInInventories Inventories Counterparty Name [Domain] The 2009 Stock Incentive Plan [Member] Represents the 2009 stock incentive plan. us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Changes in: us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments us-gaap_TreasuryStockCommonValue Less cost of 217,075 and 144,133 common shares repurchased at each June 27, 2026 and December 27, 2025 Segment Reporting [Text Block] us-gaap_TreasuryStockCommonShares Treasury Stock, Common, Shares (in shares) Treasury Stock, Common [Member] Net income (loss) Net income (loss) Adjustments to reconcile net income (loss) to cash used in operating activities: Award Type [Axis] Segment Reporting [Table Text Block] us-gaap_Liabilities Total liabilities Plan Name [Axis] Plan Name [Domain] us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders’ equity us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense us-gaap_AreaOfRealEstateProperty Area of Real Estate Property Title and Position [Axis] Segment Reporting [Table] Selling, general, and administrative expenses Share-based compensation Income Tax Disclosure [Text Block] Share-Based Payment Arrangement [Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Domain] us-gaap_IncreaseDecreaseInAccountsPayable Accounts payable Accounting Standards Update and Change in Accounting Principle [Table] Other Receivables [Member] Represents information pertaining to receivables classified as other. 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Line of Credit Facility [Table] us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total undiscounted operating lease payments us-gaap_IncreaseDecreaseInDeferredIncomeTaxes Deferred taxes us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent Weighted-average discount rate for capitalized operating leases dei_DocumentType Document Type Document Information [Line Items] Document Quarterly Report us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths 2027 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Weighted-average remaining lease term for capitalized operating leases (in months) (Month) Document Information [Table] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) Dilutive effect (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear Remaining 2026 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Document Transition Report Weighted average number of diluted common shares outstanding (in shares) Commitments and Contingencies Disclosure [Text Block] us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 2028 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Statement [Line Items] us-gaap_CommonStockSharesIssued Common Stock, Shares, Issued (in shares) us-gaap_CommonStockSharesOutstanding Common Stock, Shares, Outstanding (in shares) Award Type [Domain] us-gaap_CommonStockSharesAuthorized Common Stock, Shares Authorized (in shares) us-gaap_GainLossOnSaleOfInvestments Realized gain on sale of marketable securities Weighted average number of basic common shares outstanding (in shares) Net income (loss) per basic common share (in dollars per share) Schedule of Accrued Liabilities [Table Text Block] Net exercise of stock options Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Shares Issued [Member] Represents shares issued. us-gaap_CommonStockValue Common stock, $0.01 par value, authorized 25,000,000 shares; issued 19,605,017 and 18,132,767 shares; outstanding 18,132,767 and 17,988,634 shares at each June 27, 2026 and December 27, 2025 Effective Income Tax Rate Reconciliation [Table] Title and Position [Domain] Schedule of Inventory, Current [Table Text Block] Share Issue us-gaap_ProceedsFromIssuanceOfCommonStock Proceeds from Issuance of Common Stock Accounts payable Net intangible assets us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Document Fiscal Period Focus Document Fiscal Year Focus us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income (loss) Amendment Flag Common Stock [Member] Proceeds from sale of marketable securities Accrued payroll and related expenses Accrued legal and accounting Accrued expenses Total Accrued Expenses dei_DocumentPeriodEndDate Document Period End Date Legal Entity [Axis] Significant Accounting Policies [Text Block] us-gaap_OperatingLeaseCost Operating Lease, Cost Use of Estimates [Text Block] The entire disclosure for the use of estimates. us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less: Imputed interest dei_EntityFileNumber Entity File Number Long term lease liability Long-term lease liability us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Entity Tax Identification Number us-gaap_OperatingLeaseLiability Current lease liability Accrued other Lease liability, current portion Current lease liability 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 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1 Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Outside Directors [Member] Related to outside directors. dei_EntityFilerCategory Entity Filer Category dei_EntityShellCompany Entity Shell Company dei_EntityEmergingGrowthCompany Entity Emerging Growth Company cpsh_LesseeOperatingLeaseAnnualRentPayments Lessee, Operating Lease, Annual Rent Payments The amount of annual rent payments for lessee under operating lease. dei_EntitySmallBusiness Entity Small Business Cost basis us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis Employees [Member] Related to employees. us-gaap_OperatingIncomeLoss Income (loss) from operations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] us-gaap_InterestExpenseDebt Interest Expense, Debt Entity Address, State or Province Statement of Stockholders' Equity [Abstract] Entity Address, City or Town Marketable Securities [Table] Inventory, Current [Table] Accumulated deficit Entity Address, Address Line One Statement of Cash Flows [Abstract] dei_CityAreaCode City Area Code dei_LocalPhoneNumber Local Phone Number Entity Address, Postal Zip Code Other comprehensive income Total other comprehensive income Stockholders’ equity: Title of 12(b) Security Equity Components [Axis] Security Exchange Name Trading Symbol Proceeds from employee stock options Class of Stock [Axis] Equity Component [Domain] Total fair value us-gaap_AvailableForSaleSecuritiesDebtSecurities AOCI Attributable to Parent [Member] Equity [Text Block] Entity Common Stock, Shares Outstanding (in shares) Additional Paid-in Capital [Member] Other comprehensive income (loss) Retained Earnings [Member] Earnings Per Share [Text Block] Cost of product sales Net unrealized gains on available for sale securities us-gaap_PropertyPlantAndEquipmentNet Net property and equipment Scenario [Axis] Scenario [Domain] Deferred taxes, net Forecast [Member] Property and equipment: cpsh_PropertyPlantAndEquipmentGrossExcludingConstructioninprogress Total cost Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. 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Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Receivable [Domain] Reclassification adjustment for gains included in net income Reclassification adjustment for gains included in net income us-gaap_Assets Total Assets Cash and cash equivalents Accounts Payable and Accrued Liabilities Disclosure [Text Block] Fair Value Disclosures [Text Block] Share-Based Payment Arrangement, Option [Member] Supplemental disclosures of cash flows information: Current liabilities: us-gaap_LiabilitiesCurrent Total current liabilities Net income (loss) per diluted common share (in dollars per share) us-gaap_ContractWithCustomerLiabilityNoncurrent Deferred revenue – long term Deferred revenue Accounts receivable Depreciation and amortization Marketable securities, at fair value cpsh_IncreaseDecreaseInPrepaidExpenseAndOtherCurrentAssets Prepaid expenses and other current assets The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services and other assets that bring economic benefits for future periods. Trade Accounts Receivable [Member] us-gaap_PaymentsToAcquireIntangibleAssets Acquisition cost of patents and trademarks Receivable Type [Axis] Cash paid for interest Inventory Disclosure [Text Block] Other Commitments [Table] Finished goods Accumulated other comprehensive income (loss) Inventories, net Inventories, net us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Net income (loss) before income taxes Norton Facility [Member] Represents the company's Norton facility. Raw materials us-gaap_PaymentsToAcquireMarketableSecurities Purchases of marketable securities Additional paid-in capital The 2020 Equity Incentive Plan [Member] Represents information for the 2020 Equity Incentive Plan adopted by the Company. us-gaap_StockholdersEquity Total stockholders’ equity Balance Balance us-gaap_IncreaseDecreaseInContractWithCustomerLiability Deferred revenue us-gaap_InventoryGross Total inventory Debt Disclosure [Text Block] Summary of Foreign-derived Intangible Income [Table Text Block] Tabular disclosure of foreign-derived intangible income. Work in process Prepaid expenses and other current assets us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Share Issue us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment Stock, Class of Stock [Table] Expected expense Amount of expense on unamortized costs on foreign-derived intangible income expected to be recognized. 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