3.26.1 html 224 506 1 true 76 0 false 5 false false R1.htm 75000 - Document - Document and Entity Information Sheet http://karman-sd.com/20251231/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 75010 - Statement - Consolidated Balance Sheets Sheet http://karman-sd.com/20251231/taxonomy/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 75020 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://karman-sd.com/20251231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 75030 - Statement - Consolidated Statements of Operations and Comprehensive Income (Loss) Sheet http://karman-sd.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss Consolidated Statements of Operations and Comprehensive Income (Loss) Statements 4 false false R5.htm 75040 - Statement - Consolidated Statements of Equity Sheet http://karman-sd.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfEquity Consolidated Statements of Equity Statements 5 false false R6.htm 75050 - Statement - Consolidated Statements of Cash Flows Sheet http://karman-sd.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 7 false false R8.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 8 false false R9.htm 995457 - Disclosure - Cybersecurity Risk Management, Strategy and Governance Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance Cybersecurity Risk Management, Strategy and Governance Notes 9 false false R10.htm 995467 - Disclosure - Formation and Nature of Business Operations Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureFormationAndNatureOfBusinessOperations Formation and Nature of Business Operations Notes 10 false false R11.htm 995477 - Disclosure - Summary of Significant Accounting Policies Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 11 false false R12.htm 995487 - Disclosure - Property and Equipment Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipment1 Property and Equipment Notes 12 false false R13.htm 995507 - Disclosure - Business Combinations Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinations Business Combinations Notes 13 false false R14.htm 995517 - Disclosure - Goodwill and Intangibles Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangibles Goodwill and Intangibles Notes 14 false false R15.htm 995527 - Disclosure - Debt Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureDebt Debt Notes 15 false false R16.htm 995547 - Disclosure - Lease Obligations Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligations Lease Obligations Notes 16 false false R17.htm 995557 - Disclosure - Retirement Plans Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureRetirementPlans Retirement Plans Notes 17 false false R18.htm 995567 - Disclosure - Stockholders' Equity and Membership Units Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureStockholdersEquityAndMembershipUnits Stockholders' Equity and Membership Units Notes 18 false false R19.htm 995577 - Disclosure - Share-Based Compensation Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensation Share-Based Compensation Notes 19 false false R20.htm 995587 - Disclosure - Net Income Per Common Share and Common Unit Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureNetIncomePerCommonShareAndCommonUnit Net Income Per Common Share and Common Unit Notes 20 false false R21.htm 995597 - Disclosure - Segment Reporting Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSegmentReporting Segment Reporting Notes 21 false false R22.htm 995607 - Disclosure - Provision for (Benefit from) Income Taxes Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxes Provision for (Benefit from) Income Taxes Notes 22 false false R23.htm 995617 - Disclosure - Commitments and Contingencies Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 23 false false R24.htm 995627 - Disclosure - Subsequent Events Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSubsequentEvents1 Subsequent Events Notes 24 false false R25.htm 995637 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies 25 false false R26.htm 995647 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies 26 false false R27.htm 995657 - Disclosure - Property and Equipment (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipment1 27 false false R28.htm 995677 - Disclosure - Business Combination (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinationTables Business Combination (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinations 28 false false R29.htm 995687 - Disclosure - Goodwill and Intangibles (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangiblesTables Goodwill and Intangibles (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangibles 29 false false R30.htm 995697 - Disclosure - Debt (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureDebtTables Debt (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureDebt 30 false false R31.htm 995707 - Disclosure - Lease Obligations (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligationsTables Lease Obligations (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligations 31 false false R32.htm 995727 - Disclosure - Share-Based Compensation (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensationTables Share-Based Compensation (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensation 32 false false R33.htm 995737 - Disclosure - Net Income Per Common Share and Common Unit (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureNetIncomePerCommonShareAndCommonUnitTables Net Income Per Common Share and Common Unit (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureNetIncomePerCommonShareAndCommonUnit 33 false false R34.htm 995747 - Disclosure - Segment Reporting (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSegmentReportingTables Segment Reporting (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureSegmentReporting 34 false false R35.htm 995757 - Disclosure - Provision for (Benefit from) Income Taxes (Tables) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables Provision for (Benefit from) Income Taxes (Tables) Tables http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxes 35 false false R36.htm 995767 - Disclosure - Formation and Nature of Business Operations - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureFormationAndNatureOfBusinessOperationsAdditionalInformationDetails Formation and Nature of Business Operations - Additional Information (Details) Details 36 false false R37.htm 995777 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails Summary of Significant Accounting Policies - Additional Information (Details) Details 37 false false R38.htm 995787 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details1) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails1 Summary of Significant Accounting Policies - Additional Information (Details1) Details 38 false false R39.htm 995797 - Disclosure - Summary of Significant Accounting Policies - Summary of Contract Assets And Liabilities (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfContractAssetsAndLiabilitiesDetails Summary of Significant Accounting Policies - Summary of Contract Assets And Liabilities (Details) Details 39 false false R40.htm 995807 - Disclosure - Summary of Significant Accounting Policies - Summary of Changes In Contract Assets And Contract Liabilities (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfChangesInContractAssetsAndContractLiabilitiesDetails Summary of Significant Accounting Policies - Summary of Changes In Contract Assets And Contract Liabilities (Details) Details 40 false false R41.htm 995817 - Disclosure - Summary of Significant Accounting Policies - Summary of Revenue Disaggregated Into Markets (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfRevenueDisaggregatedIntoMarketsDetails Summary of Significant Accounting Policies - Summary of Revenue Disaggregated Into Markets (Details) Details 41 false false R42.htm 995827 - Disclosure - Summary of Significant Accounting Policies - Summary of Revenue Growth by Market (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfRevenueGrowthByMarketDetails Summary of Significant Accounting Policies - Summary of Revenue Growth by Market (Details) Details 42 false false R43.htm 995837 - Disclosure - Summary of Significant Accounting Policies - Schedule of Inventory (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfInventoryDetails Summary of Significant Accounting Policies - Schedule of Inventory (Details) Details 43 false false R44.htm 995847 - Disclosure - Summary of Significant Accounting Policies - Summary of Prepaid and Other Current Assets (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfPrepaidAndOtherCurrentAssetsDetails Summary of Significant Accounting Policies - Summary of Prepaid and Other Current Assets (Details) Details 44 false false R45.htm 995857 - Disclosure - Summary of Significant Accounting Policies - Summary of Accounts Receivable and Allowance For Credit Losses (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfAccountsReceivableAndAllowanceForCreditLossesDetails Summary of Significant Accounting Policies - Summary of Accounts Receivable and Allowance For Credit Losses (Details) Details 45 false false R46.htm 995867 - Disclosure - Summary of Significant Accounting Policies - Summary of Other Current Liabilities (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfOtherCurrentLiabilitiesDetails Summary of Significant Accounting Policies - Summary of Other Current Liabilities (Details) Details 46 false false R47.htm 995877 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetails Property and Equipment - Schedule of Property and Equipment (Details) Details 47 false false R48.htm 995887 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Parenthetical) (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentParentheticalDetails Property and Equipment - Schedule of Property and Equipment (Parenthetical) (Details) Details 48 false false R49.htm 995897 - Disclosure - Property and Equipment - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetails Property and Equipment - Additional Information (Details) Details 49 false false R50.htm 995907 - Disclosure - Asset Acquisitions - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureAssetAcquisitionsAdditionalInformationDetails Asset Acquisitions - Additional Information (Details) Details 50 false false R51.htm 995917 - Disclosure - Asset Acquisitions - Summary of Intangible Assets Acquired (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureAssetAcquisitionsSummaryOfIntangibleAssetsAcquiredDetails Asset Acquisitions - Summary of Intangible Assets Acquired (Details) Details 51 false false R52.htm 995927 - Disclosure - Business Combinations - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetails Business Combinations - Additional Information (Details) Details 52 false false R53.htm 995937 - Disclosure - Business Combinations - Schedule of Estimated Fair Values of Assets Acquired, and Liabilities Assumed in Connection with Acquisition (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinationsScheduleOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedInConnectionWithAcquisitionDetails Business Combinations - Schedule of Estimated Fair Values of Assets Acquired, and Liabilities Assumed in Connection with Acquisition (Details) Details 53 false false R54.htm 995947 - Disclosure - Business Combinations - Schedule of Intangible Assets Acquired in Acquisition (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureBusinessCombinationsScheduleOfIntangibleAssetsAcquiredInAcquisitionDetails Business Combinations - Schedule of Intangible Assets Acquired in Acquisition (Details) Details 54 false false R55.htm 995957 - Disclosure - Goodwill and Intangibles - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangiblesAdditionalInformationDetails Goodwill and Intangibles - Additional Information (Details) Details 55 false false R56.htm 995967 - Disclosure - Goodwill and Intangibles - Schedule of Goodwill (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangiblesScheduleOfGoodwillDetails Goodwill and Intangibles - Schedule of Goodwill (Details) Details 56 false false R57.htm 995977 - Disclosure - Goodwill and Intangibles - Schedule Of Carrying Amount Identifiable Intangible Assets (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangiblesScheduleOfCarryingAmountIdentifiableIntangibleAssetsDetails Goodwill and Intangibles - Schedule Of Carrying Amount Identifiable Intangible Assets (Details) Details 57 false false R58.htm 995987 - Disclosure - Goodwill and Intangibles - Schedule Of Amortization Expense (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureGoodwillAndIntangiblesScheduleOfAmortizationExpenseDetails Goodwill and Intangibles - Schedule Of Amortization Expense (Details) Details 58 false false R59.htm 995997 - Disclosure - Debt - Schedule of Notes Payable (Details) Notes http://karman-sd.com/20251231/taxonomy/role/DisclosureDebtScheduleOfNotesPayableDetails Debt - Schedule of Notes Payable (Details) Details 59 false false R60.htm 996017 - Disclosure - Debt - Schedule of Principal Repayment Requirements on the Notes Payable (Details) Notes http://karman-sd.com/20251231/taxonomy/role/DisclosureDebtScheduleOfPrincipalRepaymentRequirementsOnTheNotesPayableDetails Debt - Schedule of Principal Repayment Requirements on the Notes Payable (Details) Details 60 false false R61.htm 996027 - Disclosure - Debt - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureDebtAdditionalInformationDetails Debt - Additional Information (Details) Details 61 false false R62.htm 996037 - Disclosure - Lease Obligations - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligationsAdditionalInformationDetails Lease Obligations - Additional Information (Details) Details 62 false false R63.htm 996047 - Disclosure - Lease Obligations - Schedule of Lease Activity (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligationsScheduleOfLeaseActivityDetails Lease Obligations - Schedule of Lease Activity (Details) Details 63 false false R64.htm 996057 - Disclosure - Lease Obligations - Schedule of Supplemental Cash Flow Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligationsScheduleOfSupplementalCashFlowInformationDetails Lease Obligations - Schedule of Supplemental Cash Flow Information (Details) Details 64 false false R65.htm 996067 - Disclosure - Lease Obligations - Schedule of Maturities of Lease Liabilities (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureLeaseObligationsScheduleOfMaturitiesOfLeaseLiabilitiesDetails Lease Obligations - Schedule of Maturities of Lease Liabilities (Details) Details 65 false false R66.htm 996087 - Disclosure - Retirement Plans - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureRetirementPlansAdditionalInformationDetails Retirement Plans - Additional Information (Details) Details 66 false false R67.htm 996097 - Disclosure - Stockholders' Equity and Membership Units - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureStockholdersEquityAndMembershipUnitsAdditionalInformationDetails Stockholders' Equity and Membership Units - Additional Information (Details) Details 67 false false R68.htm 996117 - Disclosure - Share-Based Compensation - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensationAdditionalInformationDetails Share-Based Compensation - Additional Information (Details) Details 68 false false R69.htm 996127 - Disclosure - Share-Based Compensation - Summary of Assumptions for Estimated Fair value of Share-Based Compensation at Grant Date (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensationSummaryOfAssumptionsForEstimatedFairValueOfSharebasedCompensationAtGrantDateDetails Share-Based Compensation - Summary of Assumptions for Estimated Fair value of Share-Based Compensation at Grant Date (Details) Details 69 false false R70.htm 996137 - Disclosure - Share-Based Compensation - Summary of Vested and Nonvested Incentive Units (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSharebasedCompensationSummaryOfVestedAndNonvestedIncentiveUnitsDetails Share-Based Compensation - Summary of Vested and Nonvested Incentive Units (Details) Details 70 false false R71.htm 996147 - Disclosure - Net Income Per Common Share and Common Unit - Schedule of Net Income per Common Share or Unit (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureNetIncomePerCommonShareAndCommonUnitScheduleOfNetIncomePerCommonShareOrUnitDetails Net Income Per Common Share and Common Unit - Schedule of Net Income per Common Share or Unit (Details) Details 71 false false R72.htm 996157 - Disclosure - Net Income Per Common Share and Common Unit - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureNetIncomePerCommonShareAndCommonUnitAdditionalInformationDetails Net Income Per Common Share and Common Unit - Additional Information (Details) Details 72 false false R73.htm 996167 - Disclosure - Segment Reporting - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetails Segment Reporting - Additional Information (Details) Details 73 false false R74.htm 996177 - Disclosure - Segment Reporting - Summary of Revenues, Net Income and Significant Expenses (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSegmentReportingSummaryOfRevenuesNetIncomeAndSignificantExpensesDetails Segment Reporting - Summary of Revenues, Net Income and Significant Expenses (Details) Details 74 false false R75.htm 996187 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule Of Pre-tax Book Income (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfPretaxBookIncomeDetails Provision for (Benefit from) Income Taxes - Schedule Of Pre-tax Book Income (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 75 false false R76.htm 996197 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule of Provision for Income Taxes (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfProvisionForIncomeTaxesDetails Provision for (Benefit from) Income Taxes - Schedule of Provision for Income Taxes (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 76 false false R77.htm 996207 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Federal Statutory Tax Rate After the Adoption of ASU 2023-09 (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndFederalStatutoryTaxRateAfterTheAdoptionOfAsu2 Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Federal Statutory Tax Rate After the Adoption of ASU 2023-09 (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 77 false false R78.htm 996217 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule of Cash Income Taxes Paid (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfCashIncomeTaxesPaidDetails Provision for (Benefit from) Income Taxes - Schedule of Cash Income Taxes Paid (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 78 false false R79.htm 996227 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Federal Statutory Tax Rate Previously Disclosed (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndFederalStatutoryTaxRatePreviouslyDisclosedDetail Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Federal Statutory Tax Rate Previously Disclosed (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 79 false false R80.htm 996237 - Disclosure - Provision for (Benefit from) Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesSummaryOfDeferredTaxAssetsAndLiabilitiesDetails Provision for (Benefit from) Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 80 false false R81.htm 996247 - Disclosure - Provision for (Benefit from) Income Taxes - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesAdditionalInformationDetails Provision for (Benefit from) Income Taxes - Additional Information (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 81 false false R82.htm 996257 - Disclosure - Provision for (Benefit from) Income Taxes - Summary of Tax Credit Carryforwards (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesSummaryOfTaxCreditCarryforwardsDetails Provision for (Benefit from) Income Taxes - Summary of Tax Credit Carryforwards (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 82 false false R83.htm 996267 - Disclosure - Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesScheduleOfReconciliationOfUnrecognizedTaxBenefitsDetails Provision for (Benefit from) Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) Details http://karman-sd.com/20251231/taxonomy/role/DisclosureProvisionForBenefitFromIncomeTaxesTables 83 false false R84.htm 996277 - Disclosure - Subsequent Events - Additional Information (Details) Sheet http://karman-sd.com/20251231/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetails Subsequent Events - Additional Information (Details) Details 84 false false All Reports Book All Reports krmn-20251231.htm krmn-20251231.xsd http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/cyd/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 false false