Document And Entity Information us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles Intangible Note To Financial Statement Details Textual Significant Accounting Policies Note 1 - Nature of Operations, Basis of Presentation and Company Conditions Note 2 - Summary of Significant Accounting Policies Note 3 - Discontinued Operations and Sale of a Business Note 4 - Revenue From Contracts With Customers Note 6 - Inventories Note 7 - Investments Note 8 - Leases us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets Prepaid expenses and other current assets Note 10 - Segment Reporting us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables Trade accounts receivable, net of allowance Income Tax Disclosure [Text Block] Note 12 - Fair Value Measurements Note 13 - Loss Per Common Share Note 15 - Accumulated Other Comprehensive Loss us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents Cash and cash equivalents Note 16 - Notes Payable and Line of Credit Note 17 - Concentrations Current liabilities us-gaap_LiabilitiesCurrent Total current liabilities Note 18 - Other Equity Transactions Schedule of Debt [Table Text Block] Note 19 - Acquisition of Reach Construction Group, LLC Note 1 - Nature of Operations, Basis of Presentation and Company Conditions - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) Note 1 - Nature of Operations, Basis of Presentation and Company Conditions - Intangible Assets (Details) Orbital Energy Stock issued - 2 million shares us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Note 2 - Summary of Significant Accounting Policies - Update - Allowance for Credit Losses (Details) Proceeds from Notes receivable Note 3 - Discontinued Operations and Sale of a Business - Schedule of Discontinued Operations for Income Statement and Balance Sheet Disclosures (Details) us-gaap_BusinessCombinationConsiderationTransferred1 Purchase price Note 4 - Revenue From Contracts With Customers - Contract Liabilities (Details) Note 4 - Revenue From Contracts With Customers - Revenues Disaggregated (Details) Note 6 - Inventories - Inventory (Details) oeg_NumberOfSupplier Number of Supplier Represents the number of supplier of the company. Note 7 - Investments - Summary of Unaudited Financial Statements of Affiliate (Details) Note 7 - Investments - Summary of Unaudited Financial Statements of Affiliate (Details) (Parentheticals) Note 8 - Leases - Future Minimum Operating Lease Obligations (Details) us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred Liabilities incurred Note 8 - Leases - Lease Cost and Other Lease Information (Details) Note 10 - Segment Reporting - Segment Activity (Details) Note 10 - Segment Reporting - Revenue by Country (Details) Note 12 - Fair Value Measurements - Fair Value Hierarchy for Cash Equivalents and Marketable Securities (Details) Note 12 - Fair Value Measurements - Reconciliation of Changes in Fair Value (Details) Note 13 - Loss Per Common Share - Calculation of Basic and Diluted Earnings Per Share (Details) Note 15 - Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) Note 16 - Notes Payable and Line of Credit - Summary of Debt (Details) Note 17 - Concentrations - Concentration Risk (Details) Note 18- Other Equity Transactions - Shares Issued Recorded In Expense Using Grant-date Fair Value (Details) Foreign currency translation adjustment Other comprehensive income (loss) Foreign currency translation adjustment Note 19 - Acquisition of Reach Construction Group, LLC - Purchase Consideration (Details) Note 19 - Acquisition of Reach Construction Group, LLC - Purchase Consideration (Details) (Parentheticals) Note 19 - Acquisition of Reach Construction Group, LLC - Purchase Price Allocation (Details) Note 19 - Acquisition of Reach Construction Group, LLC - Pro Forma Information (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Convertible Note Receivable with VPS [Member] Represents information regarding a convertible note receivable with VPS. us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax Loss from continuing operations, net of income taxes us-gaap_PaymentsToAcquireInvestments Payments to Acquire Investments, Total Revenue since April 1, 2020 acquisition date Notes payable, current Other operating (income) expense Amount of general expenses (income) not normally included in Other Operating Costs and Expenses. Loss from continuing operations, net of income taxes since April 1, 2020 acquisition date Business Acquisition, Pro Forma Information [Table Text Block] February 2020 Financing Note [Member] Represents information regarding a financing note entered into in February 2020. us-gaap_BusinessAcquisitionsProFormaRevenue Gross revenue us-gaap_PaymentsToAcquireNotesReceivable Payments to Acquire Notes Receivable Cash paid for convertible notes receivable Line of credit James McKenzie [Member] Represents information regarding James McKenzie. Financial Instruments [Domain] Non-cash item for January 1, 2019 adoption of ASC 842 - establishment of right-of-use assets and offsetting lease obligations Represents the amount disclosed as a non-cash item for the establishment of right-of-use assets and offsetting lease obligations. Contract liabilities Current contract liabilities Financial Instrument [Axis] Accrued expenses Add back excluded acquisition intangible amortization, net oeg_ExcludedAcquisitionIntangibleAmortizationNet Represents the amount of excluded acquisition intangible amortization, net, added back to comprehensive net loss. Adjusted comprehensive loss oeg_AdjustedComprehensiveIncomeLoss Represents the amount of adjusted comprehensive income (loss) during the period, after adding back excluded acquisition intangible amortization, net. Accounts payable Accrued property and equipment purchases at June 30 Credit Facility [Axis] Proceeds from sale of property and equipment Credit Facility [Domain] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] us-gaap_PolicyTextBlockAbstract Accounting Policies Trade Names [Member] Expenditures for long-lived assets us-gaap_PaymentsToAcquireIntangibleAssets Payments to Acquire Intangible Assets Cash paid for other intangible assets us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment Order or Production Backlog [Member] Noncompete Agreements [Member] us-gaap_LossContingencyAccrualAtCarryingValue Loss Contingency Accrual, Ending Balance Current Liabilities: Developed Technology Rights [Member] Total Assets Segment assets Total assets SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: Liabilities held for sale, current The portion of the deferred gain that was recognized in the current period. us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation Total assets of the disposal group classified as held for sale us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwill1 Disposal Group, Including Discontinued Operation, Goodwill us-gaap_OperatingLeaseExpense Operating Lease, Expense us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssets Disposal Group, Including Discontinued Operation, Intangible Assets us-gaap_SubleaseIncome Sublease income oeg_EquityMethodInvestmentsGainLossInFairValue Non-cash fair value gain on equity method investment purchase Amount of gain (loss) in fair value of equity method investment. Customer Relationships [Member] Retainage receivable Amount billed to customers under current contracts or programs that have been withheld because of retainage provisions in a contract. us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssets Deferred tax asset Investment [Text Block] us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet Trade accounts receivable Computer Software, Intangible Asset [Member] Share-based Payment Arrangement [Text Block] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Business Description and Basis of Presentation [Text Block] us-gaap_RestrictedCashAndCashEquivalents Restricted Cash and Cash Equivalents, Total Loss from continuing operations, net of taxes Loss from continuing operations, net of income taxes Income from discontinued operations, net of income taxes Income from discontinued operations, net of income taxes Net loss Net loss Net Income (Loss) Attributable to Parent, Total Net loss us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Accumulated amortization Finite-lived intangible asset, accumulated amortization Finite-lived intangible asset, net Total Identifiable other intangible assets, net Finite-lived intangible asset, gross Finite-Lived Intangible Assets, Gross, Total Share-based Payment Arrangement, Option [Member] Loss Contingency, Nature [Domain] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] oeg_IncreaseDecreaseInRefundLiability Refund liabilities The amount of increase (decrease) in refund liability during the period. Loss Contingency Nature [Axis] oeg_PercentageOfRevenueFromGoodsAndServices Percentage of Revenue From Goods and Services The percentage of revenue derived from goods and services. Accumulated depreciation Business Combination Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Property and equipment, less accumulated depreciation of $1,718 and $1,441 at June 30, 2020 and December 31, 2019, respectively Goodwill Goodwill, Ending Balance Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Receivables — Third-Party, including retainage receivable us-gaap_EquityMethodInvestmentOwnershipPercentage Equity Method Investment, Ownership Percentage Income from operations of discontinued power and electromechanical components businesses Income tax (benefit) expense Discontinued Operation, Tax Effect of Discontinued Operation, Total CASH FLOWS FROM INVESTING ACTIVITIES: Pretax gain on assets contributed as part of the purchase of VPS Earnings Per Share [Text Block] Pretax profit of discontinued operations related to major classes of pretax profit Discontinued operations (Note 3) Company share of adjusted net loss at 20.58% reduced to 18.28% as of June 30, 2020 Net loss of affiliate Income (Loss) from Equity Method Investments, Total Non-cash loss on equity method investment in VPS Equity investment in affiliate Investment in VPS - equity method Equity Method Investments us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments Loss from continuing operations before income taxes and equity in net loss of affiliate Income tax benefit Income Tax Expense (Benefit), Total Line of Credit [Member] us-gaap_IncreaseDecreaseInAccruedLiabilities Accrued expenses us-gaap_IncreaseDecreaseInAccountsPayable Accounts payable us-gaap_OperatingExpenses Total operating expenses us-gaap_DebtInstrumentTerm Debt Instrument, Term (Month) Other Regions [Member] Related to all other geographic regions. us-gaap_RestrictedCash Restricted cash at beginning of period (1) Restricted cash at end of period (1) oeg_InterestRateOnNoteReceivable Interest Rate on Note Receivable The interest rate on a note receivable Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period oeg_IncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations Income Tax Expense (Benefit), Continuing and Discontinued Operations Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations and discontinued operations. UNITED KINGDOM us-gaap_AllocatedShareBasedCompensationExpense Share-based Payment Arrangement, Expense Deposit Assets [Text Block] The entire disclosure related to deposit assets. Amendment Flag The 18 Month Seller Note [Member] Represents the 18 month seller note. Comprehensive net loss us-gaap_ComprehensiveIncomeNetOfTax Comprehensive loss The 3 Year Seller Note [Member] Represents the 3 year seller note. oeg_AcquisitionAgreementIntangibleAssetsTotalConsideration Acquisition Agreement, Intangible Assets, Total Consideration The total consideration to be paid under the acquisition agreement for intangible assets. us-gaap_DebtInstrumentPeriodicPayment Debt Instrument, Periodic Payment, Total New Accounting Pronouncements, Policy [Policy Text Block] oeg_AcquisitionAgreementIntangibleAssetsConsiderationOwed Acquisition Agreement, Intangible Assets, Consideration Owed The amount of consideration owed for intangible assets under acquisition agreement. us-gaap_IncreaseDecreaseInContractWithCustomerLiability Contract liabilities us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Common stock, shares outstanding (in shares) oeg_OffbalanceSheetAssetContractualBacklog Off-balance Sheet Asset, Contractual Backlog The amount of off-balance sheet contractual backlog asset that will be recorded as future revenue. Current Fiscal Year End Date us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage Variable lease cost Total lease cost us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other current assets Weighted-average discount rate - operating leases Document Fiscal Period Focus Operating lease cost Document Fiscal Year Focus Short-term lease cost Document Period End Date Right-of-use assets obtained in exchange for new operating lease obligations us-gaap_IncreaseDecreaseInDepositsOutstanding Deposits and other assets Weighted-average remaining lease term - operating leases (in years) (Year) oeg_IncreaseInRetainageReceivable Retainage receivable The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services that was retained. Entity Emerging Growth Company us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Document Type Entity Small Business Entity Shell Company Document Information [Line Items] Document Information [Table] oeg_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour Thereafter Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Entity Filer Category Debt Instrument [Axis] Entity Current Reporting Status Debt Instrument, Name [Domain] oeg_AcquisitionAgreementAdditionalFeeForPaymentsExtension Acquisition Agreement, Additional Fee for Payments Extension The amount of additional fee in exchange for the payments extension pursuant to the agreement. London Interbank Offered Rate (LIBOR) [Member] oeg_EquityMethodInvestmentOtherThanTemporaryImpairmentAndDistribution Reduction in value of shares - impairment and distribution Amount of reduction in equity method investment related to impairment and distribution. oeg_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAccruedInterest Accrued interest Amount of increase of financial instrument for accrued interest classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. oeg_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransitionServicesProvided Increase for transition services provided Amount of increase financial instrument for transition services provided classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Variable Rate [Domain] Non-cash investment in Reach Construction Group, LLC including seller notes, equity issued and contingent consideration. Amount of noncash financial or equity instrument consideration incurred by the acquirer as part of consideration transferred in a business combination. us-gaap_AccountsReceivableNet Receivables — Third-Party, Net Integrated Energy Infrastructure Solutions and Services Segment [Member] Represents the Integrated Energy Infrastructure Solutions and Services Segment. Electric Power and Solar Infrastructure Services Segment [Member] Represents Electric Power and Solar Infrastructure Services Segment. Line of Credit with Truist [Member] Represents the line of credit with Truist. Variable Rate [Axis] Paycheck Protection Program CARES Act [Member] Represents loan designed to provide funds for small businesses to keep their employees on the payroll. Seller Financed Notes Payable, One [Member] Represents the first tranche of seller financed notes payable. Concentration risk, percentage Concentration Risk, Percentage us-gaap_IncreaseDecreaseInAccountsReceivable Trade accounts receivable Seller Financed Notes Payable, Two [Member] Represents the second tranche of seller financed notes payable. Statement of Comprehensive Income [Abstract] Seller Financed Notes Payable [Member] Represents the seller Financed notes payable. Entity Central Index Key oeg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsRetentionAccountsReceivable Retention accounts receivable Amount of retention accounts receivable acquired at the acquisition date. us-gaap_DepreciationAndAmortization Depreciation and amortization Entity Registrant Name oeg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsContractAssets Contract assets Amount of contract assets acquired, at the acquisition date. Liability Class [Axis] oeg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeasesRightOfUseAssets Right of use assets - Operating leases Amount of operating leases right-of-use assets acquired, at the acquisition date. Fair Value by Liability Class [Domain] Entity [Domain] oeg_BusinessAcquisitionProFormaExpenses Total expenses The pro forma expenses for a period as if the business combination or combinations had been completed at the beginning of the period. Legal Entity [Axis] Customer Concentration Risk [Member] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue Balance Balance Brandon S. Martin Sr. [Member] Represents Brandon S. Martin Sr. Supplier Concentration Risk [Member] oeg_LongtermDebtIssuedForBusinessAcquisitionSubjectToPreliminaryWorkingCapitalAdjustment Long-term Debt Issued for Business Acquisition, Subject to Preliminary Working Capital Adjustment The value of long-term debt issued for business acquisition, subject to preliminary working capital adjustment. Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Amortization of intangibles Geographic Concentration Risk [Member] Loss from continuing operations per common share - basic and diluted (in dollars per share) oeg_BusinessAcquisitionProFormaEarningsPerShareBasicAndDiluted The pro forma basic and diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Purchase of convertible note receivable oeg_PerformanceAndPaymentBondsOutstandingAmount Performance and Payment Bonds Outstanding Amount The amount of performance and payment bonds outstanding. Concentration Risk Type [Axis] oeg_EstimatedCostToCompleteBondedProjects Estimated Cost to Complete Bonded Projects The amount of estimated cost to complete bonded projects. Concentration Risk Type [Domain] Staffing Support Solutions LLC Matter [Member] Represents the Staffing Support Solutions LLC Matter. us-gaap_AllowanceForDoubtfulAccountsReceivable Allowance for Credit Losses us-gaap_TreasuryStockValue Treasury stock at cost; 353,063 shares held at June 30, 2020 and December 31, 2019 Customer Five [Member] Represents one of the major customers. Customer Six [Member] Represents one of the major customers. Customer Seven [Member] Represents one of the major customers. Customer Eight [Member] Represents one of the major customers. Entity Common Stock, Shares Outstanding (in shares) Vehicle and Equipment loans [Member] Represents the vehicle and equipment loans. Customer Three [Member] Represents one of the major customers. Cost of Goods and Service Benchmark [Member] Customer Four [Member] Represents one of the major customers. Revenue Benchmark [Member] Accounts Receivable [Member] Customer Nine [Member] Represents one of the major customers. Customer Ten [Member] Represents one of the major customer. Customer Eleven [Member] Represents one of the major customers. us-gaap_IncreaseDecreaseInInventories Inventories Trading Symbol Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Common stock issued as partial payment of Reach Construction Group, Inc. (in shares) Share issued, shares (in shares) us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd Line of Credit Facility, Interest Rate at Period End Common stock issued as partial payment of Reach Construction Group, Inc. Share issued, value us-gaap_TableTextBlock Notes Tables us-gaap_GainLossOnDispositionOfAssets1 Gain on disposal of assets us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity Related Party [Axis] Related Party [Domain] Selling, general and administrative expense Provision for bad debt Partial settlement of note receivable via offset against royalty payable netted with (increase) to note receivable from accrued interest The amount recorded in non-cash investing and financing activities during the period for partial settlement of note receivable via offset against royalty payable netter with (increase) to note receivable from accrued interest. Line of Credit Facility, Lender [Domain] oeg_ContractWithCustomerLiabilityIncreaseDecreaseFromTranslation Translation Represents the increase (decrease) during the period in the liability from contracts with customers attributable to translation. us-gaap_StockIssuedDuringPeriodSharesNewIssues Share issued, shares (in shares) Lender Name [Axis] Total liabilities and stockholders' equity us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Stock issued and stock to be issued for compensation, royalties and services The aggregate amount of noncash, equity-based employee remuneration and noncash equity-based remunerations for services rendered. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Deposits and other assets Noncurrent deposits and other assets. us-gaap_StockIssuedDuringPeriodValueNewIssues Share issued, value UNITED STATES Common stock issued and to be issued for royalties payable pursuant to product agreements Common stock issued for royalties pursuant to product agreements, related party. Provision for bad debt expense This element represents allowance for bad debt expense and returns during the period. Accrued investment in other intangible assets at June 30 The value of accrued investment and other intangible assets acquired in noncash investing or financing activities. us-gaap_IncreaseDecreaseInContractWithCustomerAsset Contract assets Accumulated deficit Retained Earnings (Accumulated Deficit), Ending Balance Research and development Non-current assets us-gaap_AssetsNoncurrent Accumulated other comprehensive loss Accumulated other comprehensive loss Common stock issued and to be issued for consulting services and compensation in common stock Value of stock issued in lieu of cash for consulting and compensation and accrued liabilities payable during the period. Customer Two [Member] Represents information pertaining to a second customer. us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsNoncurrent Other intangible assets Customer One [Member] Represents information pertaining to a first customer in a series of more than one customer. Money Market Funds [Member] Revenues, percent oeg_PercentageOfRevenue Represents the percentage of revenue. us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNoncurrent Property and equipment Debt Disclosure [Text Block] Cash and Cash Equivalents [Axis] Energy Segment [Member] Related to the Energy Segment. Interest expense Interest expense Cash and Cash Equivalents [Domain] Change in operating assets and liabilities, net of effects of acquisition: us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Inventory Disclosure [Text Block] Operating lease obligations, less current portion Schedule of Inventory, Current [Table Text Block] Restricted cash Total operating lease obligations Operating lease obligations - current portion Other intangible assets, net us-gaap_ForeignCurrencyTransactionGainLossUnrealized Non-cash unrealized foreign currency losses Test Products International Inc. [Member] Related to the entity Test Products International Inc. Total Identifiable other intangible assets, gross Right of use assets - Operating leases Operating Lease, Right-of-Use Asset us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Interest portion us-gaap_FinanceLeasePrincipalPayments Payments on financing lease obligations us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree 2023 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour 2024 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths 2021 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 2022 Foreign currency translation adjustment Lessee, Operating Lease, Liability, Maturity [Table Text Block] us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear 2020 Finite-lived intangible asset, useful life (Year) Revenues us-gaap_Revenues Note receivable Operating expenses: us-gaap_AssetsFairValueDisclosure Total assets Depreciation Depreciation and amortization Depreciation, Depletion and Amortization, Total November Financing Note [Member] Related to the November financing note. Current assets us-gaap_AssetsCurrent Total current assets us-gaap_CashAndCashEquivalentsFairValueDisclosure Money market securities Stockholders' Equity Note Disclosure [Text Block] us-gaap_InvestmentsFairValueDisclosure Convertible note receivable oeg_OperatingLeaseRightofuseAssetReclassifiedToAssetsHeldForSale Operating Lease, Right-of-Use Asset, Reclassified to Assets Held for Sale The amount of right of use assets for operating leases reclassified to assets held for sale during the period. Treasury stock, shares (in shares) Assets held for sale - current Note receivable, current portion Represents the current portion of note receivables. Common stock, par value $0.001; 325,000,000 shares authorized; 30,773,748 shares issued and 30,420,685 shares outstanding at June 30, 2020 and 28,736,436 shares issued and 28,383,373 shares outstanding at December 31, 2019 Adjustments to reconcile net loss to net cash used in operating activities: Common stock, shares authorized (in shares) us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent Inventories Common stock, shares issued (in shares) Investment in Convertible Note Receivable [Member] Represents information about investment in convertible note receivable. us-gaap_DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent Prepaid expenses and other current assets Common stock, par value (in dollars per share) Asia [Member] Statistical Measurement [Domain] us-gaap_OperatingLeasePayments Operating cash flows from operating leases (includes discontinued operations) Maximum [Member] SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES: Minimum [Member] Common stock issued for royalty payments Share issued, value Value of shares (or other type of equity) issued during the period pursuant to royalty agreement and share-based compensation. Statistical Measurement [Axis] Common stock issued for royalty payments (in shares) Share issued, shares (in shares) Number of shares (or other type of equity) issued during the period pursuant to royalty agreement and share-based compensation. Investment, Name [Domain] Contract assets Preferred stock, par value $0.001; 10,000,000 shares authorized; no shares issued at June 30, 2020 or December 31, 2019 Preferred stock, issued (in shares) North America [Member] Interest paid, net of capitalized interest Investment, Name [Axis] Income taxes paid Geographical [Axis] Customer List - Orbital [Member] Related to the Orbital customer list. Geographical [Domain] Trade name - Orbital [Member] Related to Orbital trade names. Preferred stock, authorized (in shares) Europe [Member] Inventories Total inventories Preferred stock, par value (in dollars per share) Work-in-process Revenues from external customers Revenues from external customers Revenues Fair Value, Inputs, Level 3 [Member] Finished goods Fair Value Hierarchy and NAV [Domain] Customer [Axis] Fair Value, Inputs, Level 1 [Member] Customer [Domain] Fair Value, Inputs, Level 2 [Member] Technology -Based Asset - Software [Member] Related to the technology based asset, software. Fair Value Hierarchy and NAV [Axis] Technology - Based Asset - Know How [Member] Related to the technology based asset, know how. All Others [Member] Related to all other countries. Disclosure of Shares Issued as Share-based Compensation and Royalty Payments [Table Text Block] Tabular disclosure of shares issued as share-based compensation and royalty payments. Raw materials Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption, Adjustment [Member] oeg_AmortizationOfDebtReceivableDiscountPremium Amortization of note receivable discount The amount of amortization of debt receivable discount (premium). Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Contingent Consideration [Member] Related to the contingent consideration liability. CASH FLOWS FROM OPERATING ACTIVITIES: Operating Lease Obligations [Member] Related to operating lease obligations. Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement [Line Items] Trade accounts receivable, allowance us-gaap_NumberOfOperatingSegments Number of Operating Segments Trade accounts receivable, net of allowance of $47 and $47 at June 30, 2020 and December 31, 2019, respectively us-gaap_NumberOfReportableSegments Number of Reportable Segments Additional paid-in capital Product Certification [Member] Related to the finite lived intangible asset product certification. AOCI Attributable to Parent [Member] Stockholders' Equity: Other income (expense) Segment Reporting Disclosure [Text Block] Restricted cash - current Current Assets: Fair Value Disclosures [Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash, cash equivalents and restricted cash at beginning of period CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD us-gaap_InvestmentIncomeInterest Investment Income, Interest Effect of exchange rate changes on cash us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net decrease in cash, cash equivalents and restricted cash us-gaap_NetCashProvidedByUsedInFinancingActivities NET CASH PROVIDED BY FINANCING ACTIVITIES us-gaap_Liabilities Total liabilities Commitments and contingencies Contract additions, net Operating loss Loss from operations Continuing loss from operations us-gaap_NetCashProvidedByUsedInOperatingActivities Net Cash Provided by (Used in) Operating Activities, Total NET CASH USED IN OPERATING ACTIVITIES us-gaap_ContractWithCustomerLiabilityRevenueRecognized Revenue recognized us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation Total liabilities Contract liability additions acquired - Reach Construction us-gaap_NetCashProvidedByUsedInInvestingActivities NET CASH USED IN INVESTING ACTIVITIES Prepaid expenses and other current assets Cost of revenues us-gaap_GrossProfit Gross profit Counterparty Name [Axis] Counterparty Name [Domain] us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations Cash Provided by (Used in) Operating Activities, Discontinued Operations us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations Cash Provided by (Used in) Investing Activities, Discontinued Operations Inventory reserve us-gaap_ContractWithCustomerLiability Total contract liabilities Total contract liabilities - beginning of period Accounting Standards Update 2016-02 [Member] us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment Equity Method Investment, Other than Temporary Impairment Accounting Standards Update [Domain] Accounting Standards Update [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Equity Method Investments [Table Text Block] Scenario [Domain] Forecast [Member] oeg_AccruedInventoryPayable Accrued Inventory Payable It represents the value of accrued inventory payable. Retained Earnings [Member] Treasury Stock [Member] Scenario [Axis] Additional Paid-in Capital [Member] Equity Components [Axis] Equity Component [Domain] Long-term Debt Long-term Debt, Total us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Loss from continuing operations before taxes Accounts Receivable, Allowance for Credit Loss [Table Text Block] Comprehensive Income (Loss) Note [Text Block] us-gaap_LineOfCredit Long-term Line of Credit, Total Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Timing of Transfer of Good or Service [Domain] Transferred at Point in Time [Member] Transferred over Time [Member] Disaggregation of Revenue [Table Text Block] Timing of Transfer of Good or Service [Axis] Revenue from Contract with Customer [Text Block] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Concentration Risk Disclosure [Text Block] Selling, General and Administrative Expenses [Member] Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Entity Interactive Data Current Title of 12(b) Security Equity Method Investment, Nonconsolidated Investee [Axis] us-gaap_ProceedsFromIssuanceOfLongTermDebt Proceeds from Issuance of Long-term Debt, Total Cost of Sales [Member] Equity Method Investment, Nonconsolidated Investee [Domain] Power and Electromechanical Business [Member] Represents information related to the Power and Electromechanical business. Income Statement Location [Axis] Income Statement Location [Domain] Discontinued Operations, Disposed of by Sale [Member] Other income and (expense) items that are not major classes Amount of non major other income (expense) attributable to disposal group, including, but not limited to, discontinued operation. Discontinued Operations, Held-for-sale [Member] (Provision for) recovery of bad debt Amount of credit (provision) for bad debt attributable to disposal group, including, but not limited to, discontinued operation. oeg_DisposalGroupIncludingDiscontinuedOperationResearchAndDevelopmentExpense Research and development Amount of research and development expense attributable to disposal group, including, but not limited to, discontinued operation. oeg_PaymentsForWorkingCapitalAdjustment Payment from working capital adjustment on Power group disposition Represents payments for working capital adjustment. Corporate and Other [Member] oeg_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilityCurrent Operating lease obligations - current portion Amount classified as operating lease liability attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. Financing note payable issued for payment on certain insurance policies Represents financing note payable issued for payment on certain insurance policies. oeg_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseRightOfUseAsset Right of use assets - Operating leases Amount classified as operating lease right of use asset attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. oeg_DisposalGroupIncludingDiscontinuedOperationDepositsAndOtherAssetsNoncurrent Deposits and other assets Amount classified as deposits and other assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer. Segments [Axis] Segments [Domain] Reconciliation of Cash and Cash Equivalents from Balance Sheet to Cash Flow Statement [Table Text Block] The tabular disclosure of reconciling items in the reconciliation of total cash and cash equivalents (including restricted cash) from the balance sheet to the cash flow statement. Other Segments [Member] us-gaap_RepaymentsOfBankDebt Payments on overdraft facility Basic and diluted weighted average number of shares outstanding (in shares) Basic and diluted weighted average common shares outstanding (in shares) us-gaap_RepaymentsOfNotesPayable Payments on notes payable oeg_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilityNoncurrent Operating lease obligations, less current portion Amount classified as operating lease liability attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer. us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) us-gaap_RepaymentsOfLinesOfCredit Payments on line of credit Proceeds from notes payable Income from discontinued operations - basic and diluted (in dollars per share) us-gaap_EarningsPerShareBasicAndDiluted Loss per common share - basic and diluted (in dollars per share) Loss per common share - basic and diluted (in dollars per share) us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent Accounts payable Proceeds from line of credit us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent Accrued expenses Proceeds from overdraft facility Loss from continuing operations per common share - basic and diluted (in dollars per share) Asset Class [Axis] Asset Class [Domain] Statement [Table] Statement of Financial Position [Abstract] Reach Construction Group [Member] Represents information related to Reach Construction Group (“Reach”). us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent, Total us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense Interest expense Business Acquisition [Axis] us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization Depreciation and amortization Business Acquisition, Acquiree [Domain] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense Selling, general and administrative expense Revenues Statement of Cash Flows [Abstract] us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold Cost of revenues First Insurance Funding [Member] Represents information related to First Insurance Funding. us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Statement of Stockholders' Equity [Abstract] Income Statement [Abstract] Disposal Groups, Including Discontinued Operations [Table Text Block] us-gaap_RestructuringReserve Accrued Liabilities, Total Disposal Group Name [Axis] Revenue from External Customers by Geographic Areas [Table Text Block] Financing Note [Member] Represents information related to financing note. Disposal Group Name [Domain] us-gaap_BusinessCombinationContingentConsiderationLiability Business Combination, Contingent Consideration, Liability, Total us-gaap_RestructuringReserveAccrualAdjustment1 Restructuring Reserve, Accrual Adjustment Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Stock issued for acquisition (in shares) us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Operating lease liabilities Represents increase (decrease) in operating lease liability. oeg_IncreaseDecreaseInOperatingLeaseRightOfUseAsset Right of use assets - Operating leases Represents increase (decrease) in right of use asset of operating lease. Non-cash investment in equity method investment - see note 7 Represents non-cash investment-equity method investment, including convertible notes receivable, certain fixed assets, other intangible assets, inventory, prepaid assets, open purchases orders, and future research and development expenditure. Schedule of Intangible Assets and Goodwill [Table Text Block] Accounting Standards Update and Change in Accounting Principle [Text Block] Type of Restructuring [Domain] Convertible note receivable Represents the noncurrent portion of investment in convertible note receivable. Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Employee Severance [Member] Contingent consideration Non-current liabilities us-gaap_LiabilitiesNoncurrent Restructuring Type [Axis] us-gaap_IncomeTaxReconciliationOtherReconcilingItems Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total CASH FLOWS FROM FINANCING ACTIVITIES: us-gaap_NotesReceivableRelatedParties Notes Receivable, Related Parties Other long-term liabilities Lease, Cost and Other Lease Information [Table Text Block] Tabular disclosure of lessee's lease cost, and other lease information. us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet Purchase price allocation Stockholders' equity us-gaap_StockholdersEquity Total stockholders' equity Balance Balance us-gaap_ContractWithCustomerLiabilityNoncurrent Long-term contract liabilities us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired Cash paid for acquisition, net of cash received us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt Liabilities assumed us-gaap_PaymentsToAcquireEquityMethodInvestments Cash paid for equity-method investment Class of Stock [Axis] us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities Deferred tax liability Lease Disclosure [Text Block] The entire disclosure for operating, finance, sale leaseback leases. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] us-gaap_PaymentsToAcquireBusinessesGross Cash payment Virtual Power Systems [Member] Represents information about Virtual Power Systems. Reach Construction Group, LLC [Member] Information pertaining to Reach Construction Group, LLC. VE Technology [Member] Information pertaining to VE Technology. Notes payable, less current portion Common Stock Outstanding [Member] Represents common stock outstanding. Deferred income taxes Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing and discontinued operations. us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment Property and equipment