Initial cash proceeds received Proceeds from Divestiture of Businesses OIL AND NATURAL GAS PROPERTIES Oil and Gas, Property and Equipment [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Estimated future contributions Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year Class of warrant or right, exercise price Class of Warrant or Right, Exercise Price Class of Warrant or Right, Exercise Price Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Net cash provided by discontinued operations Cash Provided by (Used in) Discontinued Operation Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-in Capital [Member] Equity in income of affiliates Equity in income of affiliates Income (Loss) from Equity Method Investments KD Kona 2013 LLLP K D Kona2013 L L L P [Member] Represents information pertaining to KD Kona 2013 LLLP. Tabular List, Table Tabular List [Table Text Block] Basic and diluted loss per common share attributable to Barnwell Industries, Inc. stockholders: Earnings Per Share, Basic [Abstract] Operating Activities [Axis] Operating Activities [Axis] Cash divested from the sale of discontinued operations, net of proceeds Proceeds from Divestiture of Businesses, Net of Cash Divested United States Income (Loss) from Continuing Operations before Income Taxes and after Adjusting Income (Loss) for Noncontrolling Interests Domestic The portion of earnings (loss) from continuing operations before income taxes and after adjusting income (loss) for noncontrolling interests that is attributable to domestic operations. Schedules of discontinued operations presented in the financial statements Disposal Groups, Including Discontinued Operations [Table Text Block] Payments due each year Equity Method Investment, Payments For Extended Closing Equity Method Investment, Payments For Extended Closing Number of single family lots, rights to Number Of Single Family Lots, Rights To Number Of Single Family Lots, Rights To Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Net cash provided by financing activities from continuing operations Cash Provided by (Used in) Financing Activity, Continuing Operation REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] Accrued capital expenditures Accrued Capital Expenditures, Current Carrying value as of the balance sheet date of capital expenditure obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Schedule of financial information related to reporting segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Issuance of common stock for restricted stock unites vested (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Continuing Operations Continuing Operations [Member] Current Current Income Tax Expense (Benefit) Retirement plan contributions and payments Payment for Pension and Other Postretirement Benefits Adjustment to Compensation, Amount Adjustment to Compensation Amount Pension Plan Pension Plan [Member] Interest expense Interest Expense, Short-Term Debt, Other, Increase (Decrease) Principles of Consolidation Consolidation, Policy [Policy Text Block] Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Options Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Grantee Status [Domain] Grantee Status [Domain] Foreign currency translation adjustments, taxes Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Investment in land development partnerships Land Development Partnerships [Member] Represents information pertaining to investment in land development partnerships. Antidilutive Securities [Axis] Antidilutive Securities [Axis] Impairment of assets Asset Impairment Charges Total stockholders’ equity Equity, Attributable to Parent Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Share-based compensation expense Share-Based Payment Arrangement, Expense Common stock, authorized shares (in shares) Common Stock, Shares Authorized Revenues: Segment Reporting Information, Revenue for Reportable Segment [Abstract] Issuance of common stock, net of costs (in shares) Stock Issued During Period, Shares, New Issues Current assets: Assets, Current [Abstract] Expired/Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Loss Contingency [Abstract] Loss Contingency [Abstract] Total liabilities and equity Liabilities and Equity Sale of interest in leasehold land Land investment Land Investment [Member] Represents Land investments, a reportable segment of the entity. Antidilutive shares excluded from the computation of diluted shares Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Cash flows from discontinued operations: Cash Provided by (Used in) Discontinued Operation [Abstract] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover [Abstract] DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum [Member] Exercisable at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Investment Holdings [Table] Equity Method Investment [Table] Less: Net earnings (loss) attributable to non-controlling interests of continuing operations Net Income (Loss) Attributable to Noncontrolling Interest Capital Expenditure Segment, Expenditure, Addition to Long-Lived Assets Collaborative agreement, fees, percentage of cumulative net profits Collaborative Agreement, Fees, Percentage Of Cumulative Net Profits Collaborative Agreement, Fees, Percentage Of Cumulative Net Profits KD Kukio Resorts LLLP KD Kukio Resorts L L L P [Member] Represents information pertaining to the indirect acquisition of passive interests in KD Kukio Resorts, LLLP. Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Treasury Stock Treasury Stock, Common [Member] Net loss from continuing operations Net loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Issuance of common stock for services (in shares) Stock Issued During Period, Shares, Issued for Services Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Loss from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Principles of Consolidation Principles of Consolidation [Abstract] Medicine River, Alberta, Canada Medicine River, Alberta, Canada [Member] Medicine River, Alberta, Canada Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating segments Operating Segments [Member] Schedule of supplemental cash flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Less: Comprehensive (income) loss attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Comprehensive loss attributable to Barnwell Industries, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Net loss from continuing operations attributable to Barnwell Industries, Inc. Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Components of income (loss) from continuing operations before income taxes, after adjusting income (loss) for non-controlling interests Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Triggering Event Due August 15, 2025 Triggering Event Due August 15, 2025 [Member] Triggering Event Due August 15, 2025 REVISION OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS Error Correction [Text Block] Award Timing Method Award Timing Method [Text Block] Basic net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Award Type [Axis] Award Type [Axis] Summarized financial information for the land development partnerships Schedule of Financial Information Related To Equity Method Investments [Table Text Block] Tabular disclosure of summarized financial information related to equity method investments. Contingent residual payments Sale Of Interest In Leasehold Land [Member] Sale Of Interest In Leasehold Land [Member] Legal Entity [Axis] Legal Entity [Axis] Total assets Total assets Assets Cash flows from investing activities of continuing operations: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Beginning and ending accumulated retirement plans benefit income Ending accumulated retirement plans benefit income Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Geographical [Domain] Geographical [Domain] Unused deposit, current Deposits Assets, Current Entity Address, City or Town Entity Address, City or Town Impairment: Asset Impairment Charges [Abstract] Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Collaborative agreement, percentage of cumulative net profits, priority payment Collaborative Agreement, Percentage Of Cumulative Net Profits, Priority Payment Collaborative Agreement, Percentage Of Cumulative Net Profits, Priority Payment Change in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Ownership interest in subsidiaries (as a percent) Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Warrant Warrant [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Collaborative agreement, percentage of distributions Collaborative Agreement, Percentage Of Distributions Collaborative Agreement, Percentage Of Distributions Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Revenue before interest income Revenue from Contract with Customer, Including Assessed Tax Oil and Natural Gas Properties [Line Items] Oil and Natural Gas Properties [Line Items] Aggregate Intrinsic Value Share Based Compensation Arrangement by Share based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Share Based Compensation Arrangement by Share based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Purchase price for the surrender of rights to Increment II Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Issuance costs Stock Issued During Period, Issuance Costs Stock Issued During Period, Issuance Costs Related Party Related Party [Member] Balance, beginning of period (in shares) Balance, end of period (in shares) Common Stock, Shares, Outstanding (Reversal of) provision for expected credit losses Accounts Receivable, Credit Loss Expense (Reversal) Insurance Claims Insurance Claims [Member] Schedule of components of the income tax (benefit) provision from continuing operations Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] PEO PEO [Member] Summary of disaggregation of revenue Disaggregation of Revenue [Table Text Block] Legal fees Legal Fees Gain on insurance receivable Loss Contingency, Receivable, Additions Interest income Investment Income, Interest Loss from continuing operations before equity in income of affiliates and income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Asset for retirement benefits Assets for Plan Benefits, Defined Benefit Plan United States UNITED STATES Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Net proceeds from issuance of equity Proceeds from Issuance or Sale of Equity Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Diluted net loss per common share from discontinued operations (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Cash and cash equivalents of continuing operations at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income tax (benefit) provision Total Income Tax Expense (Benefit) Dividend received from discontinued operations Proceeds From Dividends Received, Discontinued Operations Proceeds From Dividends Received, Discontinued Operations Pool Of Various Individuals Pool Of Various Individuals [Member] Pool Of Various Individuals [Member] Sale of Stock [Domain] Sale of Stock [Domain] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Oil and natural gas Oil And Natural Gas [Member] Represents Oil and gas, a reportable segment of the entity. Product and Service [Domain] Product and Service [Domain] Total property and equipment Property, Plant and Equipment, Gross Diluted net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Net loss Net loss Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest KD Development, LLC KD Development, LLC [Member] Information about KD Development, LLC. Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Triggering percentage Class of Warrant or Right, Triggering Percentage Class of Warrant or Right, Triggering Percentage Discontinued Operations and Disposal Groups [Abstract] Subsequent Event [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Proceeds from issuance of private placement Proceeds from Issuance of Private Placement City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Indirectly Acquired Interest Indirectly Acquired Interest [Member] Represents information pertaining to the indirect acquisition of interests in KD Kukio Resorts, LLLP, KD Maniniowali, LLLP, and KD Kaupulehu, LLLP. INVESTMENTS Investment [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Triggering Event [Domain] Triggering Event [Domain] Triggering Event [Domain] Nonvested at the beginning of the period (in shares) Nonvested at the end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Effect of dilutive securities - common stock options and restricted stock units Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Discontinued Operation Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Summary of receivables from contracts with customers Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] General and administrative General and administrative expenses General and Administrative Expense Long-lived assets Long-Lived Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Skadden, Arps, Slate, Meagher & Flom LLP Skadden, Arps, Slate, Meagher & Flom LLP [Member] Skadden, Arps, Slate, Meagher & Flom LLP Investments Investment in Kukio Resort Land Development Partnerships Long-Term Investments Debt, term Debt Instrument, Term Related Party Transactions [Abstract] Related Party Transactions [Abstract] Limited-Duration Shareholder Rights Plan Limited-Duration Shareholder Rights Plan [Member] Limited-Duration Shareholder Rights Plan Subsequent Event Subsequent Event [Member] Geographic information Revenues from External Customers and Long-Lived Assets [Line Items] Amortization of net actuarial gain Defined Benefit Plan, Amortization of Gain (Loss) Schedule of Assumptions Used in Estimating Fair Value Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Natural gas Natural Gas [Member] Investment Holdings [Line Items] Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Share-based Payment Arrangement, Independent Director Share-based Payment Arrangement, Independent Director [Member] Share-based Payment Arrangement, Independent Director Equity Components [Axis] Equity Components [Axis] Issuance of common stock for services Stock Issued During Period, Value, Issued for Services Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Discontinued Operation Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] KD Kaupulehu LLLP Increment I KD Kaupulehu LLLP Increment I [Member] KD Kaupulehu LLLP Increment I [Member] Number of reportable segments Number of Reportable Segments Supplemental disclosure of cash flow information and non-cash financing activities: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Entity Address, State or Province Entity Address, State or Province Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Other disclosures Defined Benefit Plan, Additional Information [Abstract] Oil and Natural Gas Properties [Table] Oil and Natural Gas Properties [Table] Disclosure of information about assets used to produce oil or gas. Drilling and pump Drilling And Pump [Member] Drilling (contract drilling) and pumping revenue only related to WRI. Individual: Individual [Axis] Vesting [Axis] Vesting [Axis] (Decrease) increase from changes in current assets and liabilities Increase (Decrease) in Other Current Assets and Liabilities, Net Aggregate cost Equity Method Investment, Aggregate Cost Accounting Changes and Error Corrections [Abstract] Other current assets Other Assets, Current Additional paid-in capital Additional Paid in Capital, Common Stock Entity [Domain] Entity [Domain] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] KD Acquisition, LLLP KD Acquisition, LLLP [Member] KD Acquisition, LLLP [Member] Document Fiscal Year Focus Document Fiscal Year Focus Number of subsidiaries Number Of Subsidiaries Number Of Subsidiaries Unaudited Interim Financial Information Basis of Accounting, Policy [Policy Text Block] GOING CONCERN Substantial Doubt about Going Concern [Text Block] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] CONTINGENCIES Contingencies Disclosure [Text Block] Entity Interactive Data Current Entity Interactive Data Current Depletion, depreciation, and amortization: Depreciation, Depletion and Amortization [Abstract] Gas processing and other Other Other Operating Segment [Member] Equity Method Investment, Summarized Financial Information [Abstract] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Cash flows from operating activities of continuing operations: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Period over which unrecognized compensation cost is expected to be recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Equity [Abstract] Number of lots developed Number of Lots Developed Represents the number of lots developed Revenue (before interest income) Revenues, Excluding Interest Income Revenues, Excluding Interest Income SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Principal payments on promissory note Debt Instrument, Periodic Payment, Principal Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Area of land (in acres) Area of Land ACCOUNTS AND OTHER RECEIVABLES AND ALLOWANCE FOR CREDIT LOSSES Allowance for Credit Losses [Text Block] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Schedule of components of net periodic benefit cost (income) Schedule of Net Benefit Costs [Table Text Block] Contributions from non-controlling interests Proceeds from (Payments to) Noncontrolling Interests Retirement benefits income Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME Comprehensive Income (Loss) Note [Text Block] Contract drilling operating Disposal Group, Including Discontinued Operation, Costs of Goods Sold Water Resources Water Resources [Member] Water Resources Schedule of changes in each component of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Depletion, depreciation, and amortization Depreciation, Depletion and Amortization Other non-current assets Other Assets, Noncurrent Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key Other property and equipment Property, Plant and Equipment, Other, Gross PEO Name PEO Name Beginning accumulated foreign currency translation Ending accumulated foreign currency translation Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Revenue Total revenues Revenues Consideration received on transaction Sale of Stock, Consideration Received on Transaction Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Payments received on note receivable related to the sale of discontinued operations Proceeds from Collection of Notes Receivable Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Defined Benefit Plan [Table] Defined Benefit Plan [Table] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Share-based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Exercise price of warrants or rights (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Segments [Axis] Segments [Axis] Oil Crude Oil, Condensate, and Natural Gas Liquids (NGL) [Member] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Accrued insurance recovery receivable Loss Contingency, Receivable, Current Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Total unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Subsequent Event Type [Axis] Subsequent Event Type [Axis] Capital expenditures - oil and natural gas Payments to Explore and Develop Oil and Gas Properties Aggregate purchase price Disposal Group, Including Discontinued Operation, Consideration ASSETS Assets [Abstract] Number of Barnwell common stock purchased by the Pension Plan Defined Benefit Plan, Plan Assets, Employer, Related Party, Number of Shares Purchased Defined Benefit Plan, Plan Assets, Employer, Related Party, Number of Shares Purchased Nonrelated Party Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Vesting [Domain] Vesting [Domain] Net periodic benefit cost: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] RETIREMENT PLANS Retirement Benefits [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Percent of award vesting rights Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Investment, Name [Axis] Investment, Name [Axis] Promissory note, interest rate Debt Instrument, Interest Rate, Stated Percentage Accounts receivable, allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Proved oil and natural gas properties (full cost method) Proved Oil And Gas Property, Full Cost Method, Gross Proved Oil And Gas Property, Full Cost Method, Gross Operating lease liabilities Operating Lease, Liability, Noncurrent Allowance for Credit Loss [Abstract] Components of the income tax (benefit) provision from continuing operations Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Net periodic benefit (income) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) KD Kaupulehu, LLLP K D Kaupulehu L L L P [Member] Represents information pertaining to the indirect acquisition of passive interests in KD Kaupulehu, LLLP. Asset retirement obligation payments Asset Retirement Obligation, Cash Paid to Settle Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Costs and Expenses Costs and Expenses Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Total unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related party transactions Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Maximum amount of shares available for issuance Sale Of Stock, Maximum Amount Of Shares Available For Issuance Sale Of Stock, Maximum Amount Of Shares Available For Issuance Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Options outstanding, weighted average remaining contractual life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Number of single family lots sold Number of Single Family Lots Sold Represents the number of single-family lots sold. Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Corporate and other Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Interest cost Defined Benefit Plan, Interest Cost Related Party [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Other Gas Processing and Other [Member] Gas Processing and Other [Member] Unused deposit, non-current Deposits Assets, Noncurrent Net cash (used in) provided by operating activities from continuing operations Cash Provided by (Used in) Operating Activity, Continuing Operation Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Collaborative agreement, percentage of cumulative net profits, priority payment, maximum amount Collaborative Agreement, Percentage Of Cumulative Net Profits, Priority Payment, Maximum Amount Collaborative Agreement, Percentage Of Cumulative Net Profits, Priority Payment, Maximum Amount Loss on sale of discontinued operations Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Retirement plans: Accumulated Other Comprehensive Income (Loss) Defined Benefit Pension and Other Postretirement Plans Net of Tax [Roll Forward] Net cash provided by (used in) investing activities from continuing operations Cash Provided by (Used in) Investing Activity, Continuing Operation Current portion of asset retirement obligation Asset Retirement Obligation, Current Sale of Stock [Axis] Sale of Stock [Axis] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Debt, prepayment amount Payment for Debt Extinguishment or Debt Prepayment Cost Short-Term Debt [Table] Short-Term Debt [Table] Non-controlling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Retirement plans Defined Benefit Plan Disclosure [Line Items] Canada CANADA Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Compensation Amount Outstanding Recovery Compensation Amount Debt, face amount Debt Instrument, Face Amount Share-based Payment Arrangement, Officer and Members of the Board Share-based Payment Arrangement, Officer And Members Of Board Of Director [Member] Share-based Payment Arrangement, Officer And Members Of Board Of Director Expected dividends Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Promissory Note Promissory Note [Member] Promissory Note Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Deferred Tax Asset, Valuation Allowance [Table] Deferred Tax Asset, Valuation Allowance [Table] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Summary of the activity in the allowance for credit losses Accounts Receivable, Allowance for Credit Loss [Table Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Nonvested at the beginning of the period (in dollars per share) Nonvested at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Share-based Payment Arrangement, Others Share-based Payment Arrangement, Others [Member] Share-based Payment Arrangement, Others Revenues: Revenues [Abstract] KD Maniniowali L L L P K D Maniniowali L L L P [Member] Represents information pertaining to the indirect acquisition of passive interests in KD Maniniowali, LLLP. Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive income, net Accumulated other comprehensive income, net of taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Options outstanding, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Segments [Domain] Segments [Domain] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Collaborative agreement, commitment to construct improvements term Collaborative Agreement, Commitment To Construct Improvements, Term Collaborative Agreement, Commitment To Construct Improvements, Term Number of securities called by warrants or rights (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Minimum Minimum [Member] Accumulated depletion, impairment, depreciation, and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Foreign currency translation: Accumulated Other Comprehensive Income (Loss) Foreign Currency Translation Adjustment Net of Tax [Roll Forward] Accretion of asset retirement obligation Asset Retirement Obligation, Accretion Expense Company Selected Measure Name Company Selected Measure Name Kaupulehu Developments Kaupulehu Developments [Member] Represents Kaupulehu Developments, a Hawaii general partnership that owns interests in leasehold land located in the North Kona District of the island of Hawaii. Operating profit (before general and administrative expenses): Operating Income (Loss) [Abstract] DEBT Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] KD Acquisition II, LP KD Acquisition II, LP [Member] KD Acquisition II, LP [Member] Common stock, par value $0.50 per share; authorized, 40,000,000 shares: 13,673,117 issued at March 31, 2026; 10,241,434 issued at September 30, 2025 Common Stock, Value, Issued Share-based Payment Arrangement, Employee Share-Based Payment Arrangement, Employee [Member] Operating Activities [Domain] Operating Activities [Domain] Share-based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] External Customer External Customer [Member] External Customer Revenues Disposal Group, Including Discontinued Operation, Revenue Credit loss (reversal) expense Credit Loss Expense (Reversal) Credit Loss Expense (Reversal) Diluted (in shares) Diluted weighted-average number of common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Commitments and contingencies (Note 16) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Non-cash rent income Increase (Decrease) in Other Deferred Liability Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Stock issuance costs, commissions, fees, and ATM-related professional services Payments of Stock Issuance Costs Cash distribution from equity method investment, gross Cash Distribution from Equity Method Investment, Gross Cash Distribution from Equity Method Investment, Gross Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Proceeds from the sale of oil and natural gas assets Proceeds from Sale of Oil and Gas Property and Equipment Non-controlling Interests Noncontrolling Interest [Member] SERP Supplemental Employee Retirement Plan [Member] Document Transition Report Document Transition Report Valuation Allowance [Line Items] Valuation Allowance [Line Items] Ownership interest acquired Ownership interest acquired Equity Method Investment, Ownership Percentage Underlying Securities Award Underlying Securities Amount Weighted-Average Remaining Contractual Term Share Based Compensation Arrangement By Share Based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] Share Based Compensation Arrangement By Share Based Payment Award, Options, Weighted Average Remaining Contractual Term Short-Term Debt [Line Items] Short-Term Debt [Line Items] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount INCOME TAXES Income Tax Disclosure [Text Block] Cash and cash equivalents Segment Reconciling Items, Cash And Cash Equivalents [Member] Segment Reconciling Items, Cash And Cash Equivalents Allowance for credit losses at beginning of period Allowance for credit losses at end of period Accounts Receivable, Allowance for Credit Loss Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Options exercisable, weighted average contractual life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Total equity Balance, beginning of period Balance, end of period Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type LOSS PER COMMON SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Accounts and other receivables, net of allowance for credit losses of: $49,000 at March 31, 2026; $49,000 at September 30, 2025 Accounts and other receivables Accounts and Other Receivables, Net, Current Proceeds from issuance of stock, net of costs Proceeds from Issuance of Common Stock Capital Expenditures: Segment Reporting Information Capital Expenditures [Abstract] All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Goods transferred at a point in time Transferred at Point in Time [Member] General and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Name Forgone Recovery, Individual Name Shares expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Discontinued Operation Payments entitled to be received as percentage of gross proceeds from sale of single family lots Payments Entitled to be Received as Percentage of Gross Proceeds from Sale of Single Family Lots Represents the percentage of gross proceeds to be received from the sale of single-family residential lots. Disposal Group Classification [Axis] Disposal Group Classification [Axis] Expired/Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Proceeds from the sale of contract drilling assets Disposal Group, Including Discontinued Operation, Proceeds From Sale Of Other Productive Assets Disposal Group, Including Discontinued Operation, Proceeds From Sale Of Other Productive Assets Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Private Placement Private Placement [Member] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Loss from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Current liabilities: Liabilities, Current [Abstract] Geographical [Axis] Geographical [Axis] Debt, periodic payment Debt Instrument, Periodic Payment Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Replay Replay Kaupulehu Development [Member] Replay Kaupulehu Development [Member] Number of Barnwell common stock held by the Pension Plan Defined Benefit Plan, Plan Assets, Employer, Related Party, Number of Shares Foreign currency loss (gain) Foreign currency gain (loss) Gain (Loss), Foreign Currency Transaction, before Tax Related Party Transaction [Table] Related Party Transaction [Table] Diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivables from contracts with customers Accounts Receivable, after Allowance for Credit Loss, Current Title of 12(b) Security Title of 12(b) Security Options exercisable, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Accounts payable Accounts Payable Treasury stock, shares (in shares) Treasury Stock, Common, Shares Earnings Per Share [Abstract] Earnings Per Share [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Distribution from equity investees in excess of earnings Proceeds from Equity Method Investment, Distribution, Return of Capital Net earnings from discontinued operations Net earnings from discontinued operations Net earnings from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Oil and Natural Gas Properties [Abstract] Oil and Natural Gas Properties [Abstract] Oil and Natural Gas Properties [Abstract] Gross profit Gross Profit Insurance recovery receivable Loss Contingency, Receivable, Proceeds KKM Makai LLLP KKM Makai LLLP [Member] Represents information pertaining to BHP's interest in KKM Makai LLLP. Commissions expense Sale Of Stock, Commissions Expense Sale Of Stock, Commissions Expense Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] Disallowed acquisition of additional shares outstanding above triggering percentage Class of Warrant or Right, Disallowed Acquisition Of Additional Shares Outstanding Above Triggering Percentage Class of Warrant or Right, Disallowed Acquisition Of Additional Shares Outstanding Above Triggering Percentage Income taxes, net of refunds Income Taxes Paid, Net Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Percent of common shares owned Defined Benefit Plan, Plan Assets, Employer, Related Party, Number Of Shares, Ownership Percent Defined Benefit Plan, Plan Assets, Employer, Related Party, Number Of Shares, Ownership Percent Award Timing Disclosures [Line Items] Natural gas liquids Natural Gas Liquids (NGL) [Member] Increase (decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations Increase (Decrease) in Asset Retirement Obligations Shares exercise price (in dollars per share) Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Accrued compensation Employee-related Liabilities, Current Barnwell Industries Inc Barnwell Industries Inc [Member] Barnwell Industries Inc [Member] STOCKHOLDERS' EQUITY Equity [Text Block] Distributions to non-controlling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Assets By Segment: Segment Reporting Information Assets [Abstract] Net loss attributable to Barnwell Industries, Inc. Net loss attributable to Barnwell Industries, Inc. Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Intersegment eliminations Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] At-the-Market Equity Offering Program At-the-Market Equity Offering Program [Member] At-the-Market Equity Offering Program Basic net loss per common share from discontinued operations (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share Accrued operating and other expenses Other Accrued Liabilities, Current Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Shares vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Interest expense Disposal Group, Including Discontinued Operation, Interest Expense Total property and equipment, net Property, Plant and Equipment, Net Payments received to date for the surrender of rights to Increment II Equity Method Investment, Payments Received to Date for the Surrender of Rights Equity Method Investment, Payments Received to Date for the Surrender of Rights Segment information Supplemental disclosures of cash flow information: Segment Reporting Information [Line Items] Triggering Event [Axis] Triggering Event [Axis] Triggering Event Numerator: Net Income (Loss) Attributable to Parent [Abstract] Adoption Date Trading Arrangement Adoption Date Shares issued, price per share (in dollars per share) Shares Issued, Price Per Share Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Increase (decrease) in capital expenditure accruals related to oil and natural gas exploration and development Increase (Decrease) in Oil and Natural Gas Exploration and Development Accruals The increase (decrease) during the reporting period in the capital expenditure accruals related to oil and natural gas exploration and development. Entity Current Reporting Status Entity Current Reporting Status Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Cash flows from financing activities of continuing operations: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Operating profit (before general and administrative expenses) Operating Income (Loss) Total Income (Loss) from Continuing Operations before Income Taxes and after Adjusting Income (Loss) for Noncontrolling Interests Represents the income (loss) from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after adjusting income (loss) for noncontrolling interest but before income taxes. (Accumulated deficit) retained earnings Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Extended closing period Equity Method Investment, Extended Closing Period Equity Method Investment, Extended Closing Period KD Kaupulehu LLLP Increment II Phase 2A KD Kaupulehu LLLP Increment II Phase 2A [Member] KD Kaupulehu LLLP Increment II Phase 2A [Member] Asset retirement obligation Asset Retirement Obligations, Noncurrent Canada Income (Loss) from Continuing Operations before Income Taxes and after Adjusting Income (Loss) for Noncontrolling Interests Foreign Represents the portion of earnings (loss) from continuing operations before income taxes and after adjusting income (loss) for noncontrolling interests that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. Interest expense Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Insurance Premium Financing Insurance Premium Financing [Member] Insurance Premium Financing Subsequent Event Type [Domain] Subsequent Event Type [Domain] Expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Cash distribution from equity method investment, net Cash Distribution from Equity Method Investment, Net Cash Distribution from Equity Method Investment, Net Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Receivables, non-current Accounts Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Noncurrent Retirement Plan Type [Axis] Retirement Plan Type [Axis] Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Statement [Table] Statement [Table] Deferred income tax (benefit) expense Deferred Deferred Income Tax Expense (Benefit) Adjustments to reconcile net loss from continuing operations to net cash (used in) provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Fair value per share (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Less: Net earnings (loss) attributable to non-controlling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Expected forfeitures Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate Total costs and expenses Disposal Group, Including Discontinued Operation, Operating Expense Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Repayments for insurance premium financing Repayments of Other Short-Term Debt Antidilutive shares excluded from computation of loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Sale of stock, price per share (in dollars per share) Sale of Stock, Price Per Share Treasury stock, at cost: 167,900 shares at March 31, 2026 and September 30, 2025 Treasury Stock, Common, Value Components of loss from continuing operations before income taxes, after adjusting the loss for non-controlling interests Income (Loss) from Continuing Operations before Income Taxes [Abstract] No definition available. Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Number of limited liability limited partnerships formed Number of Limited Liability Limited Partnerships Formed Represents the number of limited liability limited partnerships formed through a wholly-owed subsidiary. Share-Based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Summary of the Activity in Share Options Share-Based Payment Arrangement, Option, Activity [Table Text Block] Issuance of common stock for restricted stock units vested Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Basic (in shares) Basic weighted-average number of common shares outstanding Weighted Average Number of Shares Outstanding, Basic INFORMATION RELATING TO THE CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Cash Flow, Supplemental Disclosures [Text Block] Oil and natural gas operating Cost of Product and Service Sold Disposal Group Classification [Domain] Disposal Group Classification [Domain] Reconciliations between net (loss) earnings attributable to the entity's stockholders and common shares outstanding of the basic and diluted net (loss) earnings per share computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Exercisable a the end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Equity-classified share options Equity Option [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Grantee Status [Axis] Grantee Status [Axis] Proceeds from sale of KDK's interests in Increment II Proceeds from Sale of Equity Method Investments Costs and expenses: Costs and Expenses [Abstract] Foreign currency translation adjustment Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation Accounts Receivable, Allowance for Credit Loss, Foreign Currency Translation Property and equipment: Property, Plant and Equipment, Gross [Abstract] Write-offs charged against the allowance Accounts Receivable, Allowance for Credit Loss, Writeoff Common stock issued for services Issuance of Stock and Warrants for Services or Claims Significant Accounting Policies [Table] Significant Accounting Policies [Table] Tabular disclosure pertaining to an entity's significant accounting policies. Outstanding at the beginning of the period (in dollars per share) Outstanding at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based compensation arrangement by share-based payment award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, issued shares (in shares) Common Stock, Shares, Issued Class of warrant or right, issuance cost Class of Warrant or Right, Issuance Cost Class of Warrant or Right, Issuance Cost Number of rights for each outstanding share (in shares) Dividends Declared, Number Of Rights For Each Outstanding Share Dividends Declared, Number Of Rights For Each Outstanding Share Number of shares granted (in shares) Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Significant Accounting Policies Significant Accounting Policies [Line Items] Use of Estimates in the Preparation of Condensed Consolidated Financial Statements Use of Estimates, Policy [Policy Text Block] Triggering Event Due December 15, 2025 Triggering Event Due December 15, 2025 [Member] Triggering Event Due December 15, 2025 Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Abandonment and reclamation cost, cash deposit Oil and Gas Abandonment And Reclamation Cost, Cash Deposit Oil and Gas Abandonment And Reclamation Cost, Cash Deposit Triggering Event Due February 15, 2026 Triggering Event Due February 15, 2026 [Member] Triggering Event Due February 15, 2026 Loss Contingencies [Line Items] Loss Contingencies [Line Items] SUBSEQUENT EVENTS Subsequent Events [Text Block] Foreign currency translation adjustments, net of taxes of $0 Net current period other comprehensive (loss) income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Note receivable Promissory note, principal amount Accounts and Financing Receivable, after Allowance for Credit Loss, Current Insider Trading Arrangements [Line Items] Proceeds from issuance of warrants Proceeds from Issuance of Warrants Corporate and other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Cash and cash equivalents at beginning of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Discontinued Operation Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Gain on sale of assets Disposal Group, Including Discontinued Operation, Gain (Loss) On Disposition Of Assets Disposal Group, Including Discontinued Operation, Gain (Loss) On Disposition Of Assets Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Other Liabilities, Current Liability for retirement benefits Liability, Defined Benefit Plan, Noncurrent Issuance of common stock, net of costs Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Asset for retirement benefits Segment Reconciling Items, Asset For Retirement Benefits [Member] Segment Reconciling Items, Asset For Retirement Benefits Counterparty Name [Axis] Counterparty Name [Axis] Summary of the Activity in Restricted Stock Units Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Subsequent Event [Line Items] Subsequent Event [Line Items] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect, Discontinued Operation Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code KD Kaupulehu LLLP Increment II Phase 2A, Lots Completed KD Kaupulehu LLLP Increment II Phase 2A, Lots Completed [Member] KD Kaupulehu LLLP Increment II Phase 2A, Lots Completed [Member] Non-NEOs Non-NEOs [Member] Warrant exercise period Class of Warrant or Right, Warrant Exercise Period Class of Warrant or Right, Warrant Exercise Period