3.26.1 html 228 381 1 true 95 0 false 6 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Consolidated Balance Sheets Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-consolidated-balance-sheets Consolidated Balance Sheets Statements 2 false false R3.htm 002 - Statement - Consolidated Balance Sheets (Parentheticals) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-consolidated-balance-sheets-parentheticals Consolidated Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Consolidated Statements of Operations Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-consolidated-statements-of-operations Consolidated Statements of Operations Statements 4 false false R5.htm 004 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-consolidated-statements-of-stockholders-equity Consolidated Statements of Stockholders' Equity Statements 5 false false R6.htm 005 - Statement - Consolidated Statements of Cash Flows Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-consolidated-statements-of-cash-flows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 995443 - Disclosure - Award Timing Disclosure Sheet http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure Award Timing 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 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 9 false false R10.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 10 false false R11.htm 995551 - Disclosure - Note 1 - Organization Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-1-organization Note 1 - Organization Notes 11 false false R12.htm 995552 - Disclosure - Note 2 - Principles of Consolidation and Significant Accounting Policies Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies Note 2 - Principles of Consolidation and Significant Accounting Policies Notes 12 false false R13.htm 995553 - Disclosure - Note 3 - Related-Party Transactions Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions Note 3 - Related-Party Transactions Notes 13 false false R14.htm 995554 - Disclosure - Note 4 - Revenue and Segment Information Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information Note 4 - Revenue and Segment Information Notes 14 false false R15.htm 995555 - Disclosure - Note 5 - Concentration of Risk Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk Note 5 - Concentration of Risk Notes 15 false false R16.htm 995556 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-6-prepaid-expenses-and-other-current-assets Note 6 - Prepaid Expenses and Other Current Assets Notes 16 false false R17.htm 995557 - Disclosure - Note 7 - Inventory Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory Note 7 - Inventory Notes 17 false false R18.htm 995558 - Disclosure - Note 8 - Property, Plant and Equipment, Net Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-8-property-plant-and-equipment-net Note 8 - Property, Plant and Equipment, Net Notes 18 false false R19.htm 995559 - Disclosure - Note 9 - Accrued Expenses and Other Current Liabilities Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-9-accrued-expenses-and-other-current-liabilities Note 9 - Accrued Expenses and Other Current Liabilities Notes 19 false false R20.htm 995560 - Disclosure - Note 10 - Third-party Long-term Debt Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt Note 10 - Third-party Long-term Debt Notes 20 false false R21.htm 995561 - Disclosure - Note 11 - AROs Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros Note 11 - AROs Notes 21 false false R22.htm 995562 - Disclosure - Note 12 - Lease Obligations Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations Note 12 - Lease Obligations Notes 22 false false R23.htm 995563 - Disclosure - Note 13 - Income Taxes Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes Note 13 - Income Taxes Notes 23 false false R24.htm 995564 - Disclosure - Note 14 - Earnings and Dividends Per Share Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share Note 14 - Earnings and Dividends Per Share Notes 24 false false R25.htm 995565 - Disclosure - Note 15 - Commitments and Contingencies Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-15-commitments-and-contingencies Note 15 - Commitments and Contingencies Notes 25 false false R26.htm 995566 - Disclosure - Note 16 - Subsequent Events Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-16-subsequent-events Note 16 - Subsequent Events Notes 26 false false R27.htm 995570 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies 27 false false R28.htm 995571 - Disclosure - Note 2 - Principles of Consolidation and Significant Accounting Policies (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies-tables Note 2 - Principles of Consolidation and Significant Accounting Policies (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies 28 false false R29.htm 995572 - Disclosure - Note 3 - Related-Party Transactions (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-tables Note 3 - Related-Party Transactions (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions 29 false false R30.htm 995573 - Disclosure - Note 4 - Revenue and Segment Information (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-tables Note 4 - Revenue and Segment Information (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information 30 false false R31.htm 995574 - Disclosure - Note 5 - Concentration of Risk (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk-tables Note 5 - Concentration of Risk (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk 31 false false R32.htm 995575 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-6-prepaid-expenses-and-other-current-assets-tables Note 6 - Prepaid Expenses and Other Current Assets (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-6-prepaid-expenses-and-other-current-assets 32 false false R33.htm 995576 - Disclosure - Note 7 - Inventory (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory-tables Note 7 - Inventory (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory 33 false false R34.htm 995577 - Disclosure - Note 8 - Property, Plant and Equipment, Net (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-8-property-plant-and-equipment-net-tables Note 8 - Property, Plant and Equipment, Net (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-8-property-plant-and-equipment-net 34 false false R35.htm 995578 - Disclosure - Note 9 - Accrued Expenses and Other Current Liabilities (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-9-accrued-expenses-and-other-current-liabilities-tables Note 9 - Accrued Expenses and Other Current Liabilities (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-9-accrued-expenses-and-other-current-liabilities 35 false false R36.htm 995579 - Disclosure - Note 10 - Third-party Long-term Debt (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-tables Note 10 - Third-party Long-term Debt (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt 36 false false R37.htm 995580 - Disclosure - Note 11 - AROs (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros-tables Note 11 - AROs (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros 37 false false R38.htm 995581 - Disclosure - Note 12 - Lease Obligations (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-tables Note 12 - Lease Obligations (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations 38 false false R39.htm 995582 - Disclosure - Note 13 - Income Taxes (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-tables Note 13 - Income Taxes (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes 39 false false R40.htm 995583 - Disclosure - Note 14 - Earnings and Dividends Per Share (Tables) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share-tables Note 14 - Earnings and Dividends Per Share (Tables) Tables http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share 40 false false R41.htm 995584 - Disclosure - Note 1 - Organization (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-1-organization-details-textual Note 1 - Organization (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-1-organization 41 false false R42.htm 995585 - Disclosure - Note 2 - Principles of Consolidation and Significant Accounting Policies (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies-details-textual Note 2 - Principles of Consolidation and Significant Accounting Policies (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies-tables 42 false false R43.htm 995586 - Disclosure - Note 2 - Principles of Consolidation and Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-2-principles-of-consolidation-and-significant-accounting-policies-cash-cash-equivalents-and-restricted-cash-details Note 2 - Principles of Consolidation and Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash (Details) Details 43 false false R44.htm 995587 - Disclosure - Note 3 - Related-Party Transactions (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-details-textual Note 3 - Related-Party Transactions (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-tables 44 false false R45.htm 995588 - Disclosure - Note 3 - Related-party Transactions - Related Party Debt Agreements (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-related-party-debt-agreements-details Note 3 - Related-party Transactions - Related Party Debt Agreements (Details) Details 45 false false R46.htm 995589 - Disclosure - Note 3 - Related-party Transactions - Related Party Debt Agreements (Details) (Parentheticals) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-related-party-debt-agreements-details-parentheticals Note 3 - Related-party Transactions - Related Party Debt Agreements (Details) (Parentheticals) Details 46 false false R47.htm 995590 - Disclosure - Note 3 - Related-party Transactions - Consolidated Balance Sheets (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-consolidated-balance-sheets-details Note 3 - Related-party Transactions - Consolidated Balance Sheets (Details) Details 47 false false R48.htm 995591 - Disclosure - Note 3 - Related-party Transactions - Related Party Long-term Debt Outstanding (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-related-party-longterm-debt-outstanding-details Note 3 - Related-party Transactions - Related Party Long-term Debt Outstanding (Details) Details 48 false false R49.htm 995592 - Disclosure - Note 3 - Related-party Transactions - Schedule of Maturities of Related Party Debt (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-schedule-of-maturities-of-related-party-debt-details Note 3 - Related-party Transactions - Schedule of Maturities of Related Party Debt (Details) Details 49 false false R50.htm 995593 - Disclosure - Note 3 - Related-party Transactions - Consolidated Statements of Operations (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-3-relatedparty-transactions-consolidated-statements-of-operations-details Note 3 - Related-party Transactions - Consolidated Statements of Operations (Details) Details 50 false false R51.htm 995594 - Disclosure - Note 4 - Revenue and Segment Information (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-details-textual Note 4 - Revenue and Segment Information (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-tables 51 false false R52.htm 995595 - Disclosure - Note 4 - Revenue and Segment Information - Contract Balances (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-contract-balances-details Note 4 - Revenue and Segment Information - Contract Balances (Details) Details 52 false false R53.htm 995596 - Disclosure - Note 4 - Revenue and Segment Information - Segment Information (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-segment-information-details Note 4 - Revenue and Segment Information - Segment Information (Details) Details 53 false false R54.htm 995597 - Disclosure - Note 4 - Revenue and Segment Information - Capital Expenditures (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-capital-expenditures-details Note 4 - Revenue and Segment Information - Capital Expenditures (Details) Details 54 false false R55.htm 995598 - Disclosure - Note 4 - Revenue and Segment Information - Identifiable Assets (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-4-revenue-and-segment-information-identifiable-assets-details Note 4 - Revenue and Segment Information - Identifiable Assets (Details) Details 55 false false R56.htm 995599 - Disclosure - Note 5 - Concentration of Risk (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk-details-textual Note 5 - Concentration of Risk (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk-tables 56 false false R57.htm 995600 - Disclosure - Note 5 - Concentration of Risk - Schedules of Concentration of Risk, by Risk Factor (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk-schedules-of-concentration-of-risk-by-risk-factor-details Note 5 - Concentration of Risk - Schedules of Concentration of Risk, by Risk Factor (Details) Details 57 false false R58.htm 995601 - Disclosure - Note 5 - Concentration of Risk - Disaggregation of Revenue (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-5-concentration-of-risk-disaggregation-of-revenue-details Note 5 - Concentration of Risk - Disaggregation of Revenue (Details) Details 58 false false R59.htm 995602 - Disclosure - Note 6 - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-6-prepaid-expenses-and-other-current-assets-schedule-of-prepaid-expenses-and-other-current-assets-details Note 6 - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) Details 59 false false R60.htm 995603 - Disclosure - Note 7 - Inventory (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory-details-textual Note 7 - Inventory (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory-tables 60 false false R61.htm 995604 - Disclosure - Note 7 - Inventory - Schedule of Inventory (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-7-inventory-schedule-of-inventory-details Note 7 - Inventory - Schedule of Inventory (Details) Details 61 false false R62.htm 995605 - Disclosure - Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment, Net (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-8-property-plant-and-equipment-net-property-plant-and-equipment-net-details Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment, Net (Details) Details 62 false false R63.htm 995606 - Disclosure - Note 9 - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-9-accrued-expenses-and-other-current-liabilities-schedule-of-accrued-expenses-and-other-current-liabilities-details Note 9 - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Details 63 false false R64.htm 995607 - Disclosure - Note 10 - Third-party Long-term Debt (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-details-textual Note 10 - Third-party Long-term Debt (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-tables 64 false false R65.htm 995608 - Disclosure - Note 10 - Third-party Long-term Debt - Loan Agreements Summary (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-loan-agreements-summary-details Note 10 - Third-party Long-term Debt - Loan Agreements Summary (Details) Details 65 false false R66.htm 995609 - Disclosure - Note 10 - Third-party Long-term Debt - Outstanding Debt (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-outstanding-debt-details Note 10 - Third-party Long-term Debt - Outstanding Debt (Details) Details 66 false false R67.htm 995610 - Disclosure - Note 10 - Third-party Long-term Debt - Unamortized Debt Issuance Costs (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-unamortized-debt-issuance-costs-details Note 10 - Third-party Long-term Debt - Unamortized Debt Issuance Costs (Details) Details 67 false false R68.htm 995611 - Disclosure - Note 10 - Third-party Long-term Debt - Accrued Interest (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-accrued-interest-details Note 10 - Third-party Long-term Debt - Accrued Interest (Details) Details 68 false false R69.htm 995612 - Disclosure - Note 10 - Third-party Long-term Debt - Schedule of Maturities of Long-Term Debt (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-10-thirdparty-longterm-debt-schedule-of-maturities-of-longterm-debt-details Note 10 - Third-party Long-term Debt - Schedule of Maturities of Long-Term Debt (Details) Details 69 false false R70.htm 995613 - Disclosure - Note 11 - AROs (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros-details-textual Note 11 - AROs (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros-tables 70 false false R71.htm 995614 - Disclosure - Note 11 - AROs - ARO Liability (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-11-aros-aro-liability-details Note 11 - AROs - ARO Liability (Details) Details 71 false false R72.htm 995615 - Disclosure - Note 12 - Lease Obligations (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-details-textual Note 12 - Lease Obligations (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-tables 72 false false R73.htm 995616 - Disclosure - Note 12 - Lease Obligations - Lease-related Assets and Liabilities (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-leaserelated-assets-and-liabilities-details Note 12 - Lease Obligations - Lease-related Assets and Liabilities (Details) Details 73 false false R74.htm 995617 - Disclosure - Note 12 - Lease Obligations - Weighted Average Remaining Lease Term and Discount Rate (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-weighted-average-remaining-lease-term-and-discount-rate-details Note 12 - Lease Obligations - Weighted Average Remaining Lease Term and Discount Rate (Details) Details 74 false false R75.htm 995618 - Disclosure - Note 12 - Lease Obligations - Lease Costs (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-lease-costs-details Note 12 - Lease Obligations - Lease Costs (Details) Details 75 false false R76.htm 995619 - Disclosure - Note 12 - Lease Obligations - Supplemental Cash Flow Information (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-supplemental-cash-flow-information-details Note 12 - Lease Obligations - Supplemental Cash Flow Information (Details) Details 76 false false R77.htm 995620 - Disclosure - Note 12 - Lease Obligations - Maturities of Lease Liabilities (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-maturities-of-lease-liabilities-details Note 12 - Lease Obligations - Maturities of Lease Liabilities (Details) Details 77 false false R78.htm 995621 - Disclosure - Note 12 - Lease Obligations - Future Minimum Annual Lease Commitments (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-12-lease-obligations-future-minimum-annual-lease-commitments-details Note 12 - Lease Obligations - Future Minimum Annual Lease Commitments (Details) Details 78 false false R79.htm 995622 - Disclosure - Note 13 - Income Taxes (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-details-textual Note 13 - Income Taxes (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-tables 79 false false R80.htm 995623 - Disclosure - Note 13 - Income Taxes - Provision for Income Tax Benefit (Expense) (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-provision-for-income-tax-benefit-expense-details Note 13 - Income Taxes - Provision for Income Tax Benefit (Expense) (Details) Details 80 false false R81.htm 995624 - Disclosure - Note 13 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details Note 13 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) Details 81 false false R82.htm 995625 - Disclosure - Note 13 - Income Taxes - Deferred Income Taxes (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-deferred-income-taxes-details Note 13 - Income Taxes - Deferred Income Taxes (Details) Details 82 false false R83.htm 995626 - Disclosure - Note 13 - Income Taxes - NOL Carryforwards (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-nol-carryforwards-details Note 13 - Income Taxes - NOL Carryforwards (Details) Details 83 false false R84.htm 995627 - Disclosure - Note 13 - Income Taxes - Income Taxes Paid (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-13-income-taxes-income-taxes-paid-details Note 13 - Income Taxes - Income Taxes Paid (Details) Details 84 false false R85.htm 995628 - Disclosure - Note 14 - Earnings and Dividends Per Share (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share-details-textual Note 14 - Earnings and Dividends Per Share (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share-tables 85 false false R86.htm 995629 - Disclosure - Note 14 - Earnings and Dividends Per Share - Reconciliation Between Basic and Diluted Income Per Share (Details) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-14-earnings-and-dividends-per-share-reconciliation-between-basic-and-diluted-income-per-share-details Note 14 - Earnings and Dividends Per Share - Reconciliation Between Basic and Diluted Income Per Share (Details) Details 86 false false R87.htm 995630 - Disclosure - Note 15 - Commitments and Contingencies (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-15-commitments-and-contingencies-details-textual Note 15 - Commitments and Contingencies (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-15-commitments-and-contingencies 87 false false R88.htm 995631 - Disclosure - Note 16 - Subsequent Events (Details Textual) Sheet http://www.blue-dolphin-energy.com/20251231/role/statement-note-16-subsequent-events-details-textual Note 16 - Subsequent Events (Details Textual) Details http://www.blue-dolphin-energy.com/20251231/role/statement-note-16-subsequent-events 88 false false All Reports Book All Reports bdco-20251231.xsd bdco-20251231_cal.xml bdco-20251231_def.xml bdco-20251231_lab.xml bdco-20251231_pre.xml bdco20251231_10k.htm image02.jpg uhynewlogo.jpg http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/cyd/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true