Document And Entity Information Note To Financial Statement Details Textual Maturity of certificates of deposit Tax at statutory rates Significant Accounting Policies Note 1 - Nature of Business and Significant Accounting Policies Note 2 - Fair Value of Financial Instruments Note 3 - Property and Equipment Note 4 - Land Purchases and Sales Note 5 - Oil and Gas Leases Note 6 - Segment Reporting Share-Based Payment Arrangement, Employee [Member] Note 7 - Concentrations Income Tax Disclosure [Text Block] Note 8 - Income Taxes Note 1 - Nature of Business and Significant Accounting Policies - Property, Plant, and Equipment, Useful Life (Details) Note 2 - Fair Value of Financial Instruments - Financial Instruments (Details) us-gaap_ShareBasedCompensation Share-based compensation Note 3 - Property and Equipment - Property and Equipment (Details) us-gaap_LiabilitiesCurrent Total current liabilities Lessee, Leases [Policy Text Block] Note 4 - Land Purchases and Sales - Land Sale (Details) Note 5 - Oil and Gas Leases - Oil and Gas Leasing Activities (Details) Note 6 - Segment Reporting - Segmented Operations Information (Details) Earnings Per Share, Policy [Policy Text Block] Note 7 - Concentrations - Customers Representing 5% or More of Total Revenue (Details) Note 8 - Income Taxes - Income Taxes - Components of Deferred Taxes (Details) us-gaap_Revenues Total revenue Revenues, Total Note 8 - Income Taxes - Reconciliation of Income Tax Rate (Details) Note 8 - Income Taxes - Deferred Income Taxes (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Income Tax, Policy [Policy Text Block] Total us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) Cash and Cash Equivalents Excluding Certificates of Deposit [Member] Represents cash and cash equivalents excluding certificates of deposit. Depreciation expense Depreciation, Total Depletion expense Depletion, Total us-gaap_DepreciationDepletionAndAmortization Depreciation and depletion us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) us-gaap_AssetsCurrent Total current assets us-gaap_PaymentsToAcquireInvestments Purchases of certificates of deposit Cash and cash equivalents, fair value Share-Based Payment Arrangement [Policy Text Block] Certificates of Deposit [Policy Text Block] Disclosure of certificates of deposits policy. us-gaap_GainLossOnSaleOfProperties Gain on sale of land Gain (Loss) on Sale of Properties Lease fees The amount of revenue relating to lease fees. Surface Segment [Member] The name or description of the segment. Treasury Stock, Common, Shares (in shares) Common stock, 3,000,000 shares authorized, no par value, 2,102,595 and 2,053,129 shares issued and outstanding, respectively, as of December 31, 2025, and 2,066,044 and 2,027,032 shares issued and outstanding, respectively, as of December 31, 2024 Land sold, ownership Represents the ownership percentage of land sold during the period. Financial Instruments [Domain] Fair Value, Recurring and Nonrecurring [Table] Common Stock, Shares Authorized (in shares) Trade payables and accrued expenses Unearned revenue Common Stock, Shares, Issued (in shares) Certificates of Deposit [Member] Financial Instrument [Axis] Stockholders' Equity, Policy [Policy Text Block] Common Stock, No Par Value (in dollars per share) Revenue from Contract with Customer [Policy Text Block] Lessor, Operating Leases [Text Block] us-gaap_LessorOperatingLeaseTermOfContract Lessor, Operating Lease, Term of Contract (Year) Income tax payable Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Product and Service [Axis] Product and Service [Domain] Net deferred tax assets Statistical Measurement [Axis] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted Proceeds from the sale of fixed assets us-gaap_DeferredTaxAssetsLiabilitiesNet Net deferred tax liabilities Cash paid for interest us-gaap_PolicyTextBlockAbstract Accounting Policies Cash paid for income taxes Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Property, Plant and Equipment Disclosure [Text Block] ckx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodFairValue Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Deferred tax assets Property, Plant and Equipment [Table Text Block] Deferred tax liabilities Net deferred tax liabilities Portion at Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Measurement Basis [Axis] Fair Value Hierarchy and NAV [Domain] Customer [Axis] Land Located in Calcasieu, Louisiana [Member] Represents the land located in Calcasieu, Louisiana. Customer [Domain] Fair Value, Inputs, Level 2 [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Grantee Status [Domain] Mineral rights, percent The conveyed percentage of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization. Grantee Status [Axis] Fair Value Hierarchy and NAV [Axis] Current liabilities: us-gaap_Assets Total assets Total assets SUPPLEMENTAL CASH FLOW INFORMATION Land sale Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Furniture and equipment (Year) CASH FLOWS FROM OPERATING ACTIVITIES us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Statement [Line Items] Revenues, leases Operating Lease, Lease Income us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent Accounts Receivable, Allowance for Credit Loss, Current Accrued accounts receivable us-gaap_NumberOfOperatingSegments Number of Operating Segments Timber Properties [Member] us-gaap_NumberOfReportableSegments Number of Reportable Segments Additional paid in capital Deferred tax asset Revenues: us-gaap_CapitalizedContractCostNet Capitalized Contract Cost, Net, Total Miscellaneous income Miscellaneous Income Represents miscellaneous income. Share-Based Payment Arrangement [Text Block] Land and Land Improvements [Member] Stockholders' equity: ckx_DepositAssetsStumpageAgreements Deposit Assets, Stumpage Agreements The amount of stumpage agreements held as deposit assets. Land [Member] Property, Plant and Equipment, Policy [Policy Text Block] Net Operating Loss Carryover [Member] Represents the deferred tax asset for net operating loss carryover. Property, Plant and Equipment [Table] Percentage Depletion Carryover [Member] Represents the deferred tax asset for percentage depletion carryover. Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Segment Reporting Disclosure [Text Block] Award Type [Domain] Effective Income Tax Rate Reconciliation [Table] Exclusive Right to Evaluate and Market Lands For Beneficial Purposes to Compensate for Impact [Member] Related to the exclusive right to evaluate and market lands for beneficial purposes to compensate for the impact on land made by the company. Current assets: Fair Value Disclosures [Text Block] Net income Net income Net income Award Type [Axis] Fair Value, by Balance Sheet Grouping [Table Text Block] ckx_AccruedRoyaltyIncome Accrued Royalty Income Represents the amount of accrued royalty income. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents, beginning of the period Cash and cash equivalents, end of the period Phantom Share Units (PSUs) [Member] Interest income Interest Income Furniture and Equipment [Member] Information pertaining to furniture and equipment. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect NET CHANGE IN CASH AND CASH EQUIVALENTS Restricted Stock Units (RSUs) [Member] Property, Plant and Equipment, Useful Life [Table Text Block] Tabular disclosure of the useful life of physical assets used in the normal conduct of business and not intended for resale. us-gaap_Liabilities Total liabilities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used in financing activities Royalty interests Amount of royalty interest from oil and gas producing activities. Performance Shares [Member] us-gaap_OperatingIncomeLoss Income from operations Income from operations us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Prepaid expense and other assets us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash provided by (used in) investing activities us-gaap_DeferredTaxLiabilities Net deferred tax assets us-gaap_GrossProfit Gross Profit Total Gross Profit Cost of goods and services sold Deferred tax liability Deferred tax assets (liabilities) Consolidation Items [Domain] us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Accumulated depreciation Property and equipment, net Total Consolidation Items [Axis] Property and equipment, gross Concentration Risk, Credit Risk, Policy [Policy Text Block] Oil And Gas Segment [Member] Oil and gas segment. Stock-based Compensation [Member] Represents the deferred tax asset for stock-based compensation. us-gaap_PaymentsOfDividendsCommonStock Payments of Ordinary Dividends, Common Stock us-gaap_CostsAndExpenses Total costs, expenses and (gains) Cost of Goods Sold CASH FLOWS FROM INVESTING ACTIVITIES us-gaap_PaymentsForRepurchaseOfCommonStock Repurchases of common stock Increase (decrease) in current liabilities us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total Retained Earnings [Member] Revenue Revenue Revenues Schedule of Land Property Sales [Table Text Block] Tabular disclosure for property sales. Treasury Stock, Common [Member] Related Party Transaction [Table] us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Additional Paid-in Capital [Member] Intersegment Eliminations [Member] Common Stock [Member] Related Party Transactions Disclosure [Text Block] us-gaap_IncomeTaxExpenseBenefit Total income taxes Equity Components [Axis] Equity Component [Domain] Federal and state income tax expense (benefit): Current us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income before income taxes Income (loss) before income taxes dei_IcfrAuditorAttestationFlag ICFR Auditor Attestation Flag General and administrative expense General & administrative expense us-gaap_TaxesOther Taxes, Other Cash and cash equivalents State and Local Jurisdiction [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Domain] Domestic Tax Jurisdiction [Member] us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities Production costs Equipment [Member] us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes Results before income tax expense us-gaap_ResultsOfOperationsIncomeTaxExpense Estimated income tax expense us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts Results of operations from producing activities excluding corporate overhead Document Annual Report Accounts Receivable [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] ckx_PolicyTable Entity Incorporation, State or Country Code Amendment Flag us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities Oil and Gas, Result of Operation, Revenue Accounting Policies [Abstract] Document Transition Report dei_CityAreaCode City Area Code dei_DocumentFinStmtErrorCorrectionFlag Document Financial Statement Error Correction [Flag] Basis of Accounting, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Concentration Risk Disclosure [Text Block] dei_EntityInteractiveDataCurrent Entity Interactive Data Current Concentration Risk [Table] Oil and Gas, Result of Operation, Producing Activity [Table Text Block] Oil and Gas, Result of Operation, Producing Activity [Table] us-gaap_GainLossOnSaleOfPropertyPlantEquipment Gain on sale of land Gain on Sale of Land us-gaap_SharesOutstanding Balances (in shares) Balances (in shares) Security Exchange Name Common Stock, Shares, Outstanding (in shares) Title of 12(b) Security us-gaap_IncreaseDecreaseInOperatingAssets (Increase) decrease in current assets Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Year Focus dei_DocumentPeriodEndDate Document Period End Date dei_EntityFileNumber Entity File Number Entity Emerging Growth Company Real Estate Disclosure [Text Block] dei_DocumentType Document Type Entity Small Business dei_EntityShellCompany Entity Shell Company us-gaap_SegmentExpenditureAdditionToLongLivedAssets Capital expenditures dei_AuditorName Auditor Name Document Information [Line Items] Document Information [Table] dei_EntityPublicFloat Entity Public Float Entity Filer Category dei_AuditorFirmId Auditor Firm ID dei_EntityCurrentReportingStatus Entity Current Reporting Status dei_EntityVoluntaryFilers Entity Voluntary Filers dei_AuditorLocation Auditor Location dei_EntityWellKnownSeasonedIssuer Entity Well-known Seasoned Issuer Name of Property [Axis] Segments [Axis] Name of Property [Domain] Segments [Domain] Award Timing Disclosures [Line Items] us-gaap_ImpairmentOfLongLivedAssetsHeldForUse Impairment, Long-Lived Asset, Held-for-Use, Total us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding Diluted (in shares) Award Timing, How MNPI Considered [Text Block] Share-based compensation ecd_AwardTmgMnpiCnsdrdFlag Award Timing MNPI Considered [Flag] Entity Tax Identification Number Casualty Loss [Member] The amount of loss pertaining to casualty. Entity Central Index Key Insider Trading Policies and Procedures [Line Items] Deferred Gain [Member] The amount of deferred gain. dei_EntityRegistrantName Entity Registrant Name Major Customers 1 [Member] The customer that makes up a certain percentage of revenue. Liability Class [Axis] Insider Trading Policies and Procedures Adopted [Flag] Insider Trading Policies and Procedures Adopted [Flag] Land Located in Calcasieu, Louisiana 2 [Member] Represents second piece of land located in Calcasieu Louisiana. Major Customers 2 [Member] The customer that makes up a certain percentage of revenue. Fair Value by Liability Class [Domain] Major Customers 3 [Member] The customer that makes up a certain percentage of revenue. Entity [Domain] Major Customers 4 [Member] The customer that makes up a certain percentage of revenue. Asset Class [Axis] Legal Entity [Axis] Major Customers 5 [Member] The customer that makes up a certain percentage of revenue. Asset Class [Domain] Statement [Table] Entity Address, Address Line One Statement of Financial Position [Abstract] us-gaap_EarningsPerShareDiluted Diluted (in dollars per share) Timber Segment [Member] Represents the timber segment. us-gaap_WeightedAverageNumberOfSharesOutstandingBasic Basic (in shares) us-gaap_TreasuryStockValueAcquiredCostMethod Repurchases of common stock ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Other, percent Entity Address, City or Town ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] us-gaap_EffectiveIncomeTaxRateContinuingOperations Income tax on income Entity Address, Postal Zip Code us-gaap_TreasuryStockCommonValue Treasury stock, 49,466 and 39,012 shares, at cost, respectively, as of December 31, 2025 and 2024 us-gaap_EarningsPerShareBasic Basic (in dollars per share) Land Located in Various Locations [Member] Represents land in various locations. Entity Address, State or Province ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Material Terms of Trading Arrangement [Text Block] Statement of Cash Flows [Abstract] dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Trading Arrangements, by Individual [Table] Statement of Stockholders' Equity [Abstract] Income Statement [Abstract] Trading Symbol Stream Wetlands Services [Member] Related to Stream Wetlands Services. Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] dei_LocalPhoneNumber Local Phone Number Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] us-gaap_TableTextBlock Notes Tables Stock-based compensation, percent Accounting Standards Update and Change in Accounting Principle [Table] Depletion, percent Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Issuances under share-based compensation (in shares) Area of land (Acre) Issuances under share-based compensation Other CASH FLOWS FROM FINANCING ACTIVITIES Tax at statutory rates, percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Timber [Member] us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Reported Value Measurement [Member] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Related Party Transaction [Axis] Related Party Transaction [Domain] Retained earnings Surface Leases, Unrelated Parties [Member] Surface leases to external customers. Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Adjustments to reconcile net income to net cash provided by operating activities: us-gaap_StockholdersEquity Total stockholders' equity Balances Balances ckx_RelatedPartyTransactionGuaranteedMinimumPayment Related Party Transaction, Guaranteed Minimum Payment Minimum amount of guaranteed payment from related party transaction. Surface Leases, Related Parties [Member] Surface leases to related parties. Oil and Gas [Member] us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Class of Stock [Axis] us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost Stock-based compensation Deferred income taxes Depletion Surface Leases [Member] Surface leases to unrelated and related parties. Operating Segments [Member] Deferred