Document And Entity Information Expected dividend yield Note To Financial Statement Details Textual Tax at statutory rate, amount Significant Accounting Policies Note 2 - Summary of Significant Accounting Policies us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum Risk-free interest rate, Maximum Note 3 - Cash, Cash Equivalents and Restricted Cash Note 5 - Fair value of Marketable Securities Note 6 - Inventories Note 7 - Leases Note 8 - Share-based Compensation Plans Note 9 - Accrued Expenses us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum Risk-free interest rate, Minimum (Rate) Income Tax Disclosure [Text Block] Note 12 - Income Taxes Note 13 - Enactment of the One Big Beautiful Bill Act Note 15 - Concentrations of Credit Risk, Significant Customers and Geographic Information Expected volatility Note 16 - Net Income Per Share us-gaap_LiabilitiesCurrent Total current liabilities Note 2 - Summary of Significant Accounting Policies - Schedule Of Reportable Segments (Details) Note 3 - Cash, Cash Equivalents and Restricted Cash - Schedule of Cash (Details) Note 5 - Fair Value of Marketable Securities - Marketable Securities Purchased (Details) Note 6 - Inventories - Inventories (Details) Expected life in years (Year) Note 7 - Leases - Capitalized Operating Leases (Details) Note 8 - Share-based Compensation Plans - Stock Option Activity (Details) Note 8 - Share-based Compensation Plans - Annualized Weighted Average Values of Significant Assumptions Used to Estimate Fair Values (Details) Note 9 - Accrued Expenses - Accrued Expenses (Details) Note 12 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) Note 12 - Income Taxes - Components of Net Deferred Tax Assets (Details) Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Note 12 - Income Taxes - Summary of Changes in Deferred Tax Asset (Details) Note 12 - Income Taxes - Effective Income Tax Rate Reconciliation for Computed Income Tax Expense (Benefit) (Details) Note 13 - Enactment of the One Big Beautiful Bill Act - Modifications to FDII Expenses (Details) Note 15 - Concentrations of Credit Risk, Significant Customers and Geographic Information - Significant Customers as a Percentage of Total Revenues (Details) Note 14 - Concentrations of Credit Risk, Significant Customers and Geographic Information - Revenue by Geographical Location (Details) Note 16 - Net Income Per Share - Basic and Diluted Earnings Per Share (Details) Share-Based Payment Arrangement, Activity [Table Text Block] Notes To Financial Statements Notes To Financial Statements [Abstract] Sale of marketable securities Rockland Trust Company [Member] Represents Rockland Trust Company. Options exercisable, weighted average exercise price (in dollars per share) Options exercisable, weighted remaining contractual life (Year) Note payable, current portion Options exercisable, Aggregate intrinsic value Options exercisable, shares (in shares) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 Outstanding, weighted remaining contractual life (Year) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue Outstanding, Aggregate intrinsic value Weighted average fair value of grants (in dollars per share) us-gaap_PaymentsToAcquireMarketableSecurities Purchase of marketable securities us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Outstanding, weighted average exercise price (in dollars per share) Outstanding, weighted average exercise price (in dollars per share) Deferred revenue Expired, weighted average exercise price (in dollars per share) Granted, weighted average exercise price (in dollars per share) Exercised, weighted average exercise price (in dollars per share) Accrued expenses Accrued Liabilities, Current Lessee, Operating Leases [Text Block] Accounts payable us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Outstanding, shares (in shares) Outstanding, shares (in shares) Revolving Credit Facility [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod Expired, shares (in shares) Credit Facility [Axis] Credit Facility [Domain] Accrued other Accrued payroll and related expenses us-gaap_PolicyTextBlockAbstract Accounting Policies Customer A [Member] Represents significant customer A. Customer B [Member] Represents significant customer B. Customer C [Member] Represents significant customer C. cpsh_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. Net exercise of stock options us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Accrued legal and accounting Summary Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Tabular disclosure of the summary components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. us-gaap_PaymentsToAcquireIntangibleAssets Acquisition cost of patents and trademarks Other Country [Member] Represents other country. us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Significant Customers A, B, and C [Member] Represents significant customers A, B, and C. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Grantee Status [Domain] Cash paid for income taxes Grantee Status [Axis] Current liabilities: us-gaap_Assets Total Assets Supplemental cash flow information: Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Plan Name [Axis] Plan Name [Domain] Property and equipment: us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Deferred taxes, net Share-Based Payment Arrangement [Text Block] Business Description and Basis of Presentation [Text Block] Award Type [Domain] Effective Income Tax Rate Reconciliation [Table] Enactment of the One Big Beautiful Bill Act [Text Block] The entire disclosure for changes in the Internal Revenue Code as a result of the enactment of the One Big Beautiful Bill Act. 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