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v2.4.1.9

Income Taxes (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Operating Loss Carryforwards [Line Items] |  |
Provision (benefit) for income taxes | $ (4,000)us-gaap_IncomeTaxExpenseBenefit | $ 3,948,000 us-gaap_IncomeTaxExpenseBenefit
Tax Credit Carryforward [Line Items] |  |
Alternative minimum tax | 111,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax |
Expiration date | Dec. 31, 2034 |
Deferred tax assets [Abstract] |  |
Inventory reserve | 1,151,000 us-gaap_DeferredTaxAssetsInventory | 996,000 us-gaap_DeferredTaxAssetsInventory
Fixed assets | 0 lgl_FixedAssetRelatedDeferredTaxAssetLiability | 0 lgl_FixedAssetRelatedDeferredTaxAssetLiability
Other reserves and accruals | 109,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther | 90,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Stock-based compensation | 367,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 295,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Undistributed foreign earnings | 0 lgl_UndistributedForeignEarningsDeferredTaxAssetLiability | 0 lgl_UndistributedForeignEarningsDeferredTaxAssetLiability
Other | 1,000 lgl_OtherDeferredTaxAssetLiability | 0 lgl_OtherDeferredTaxAssetLiability
Tax credit carry-forwards | 1,755,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 1,648,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Federal tax loss carry-forwards | 3,220,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 2,586,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
State tax loss carry-forwards | 901,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 541,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Foreign tax loss carry-forwards | 268,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 276,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Total deferred income tax assets | 7,772,000 us-gaap_DeferredTaxAssetsGross | 6,432,000 us-gaap_DeferredTaxAssetsGross
Valuation allowance | (7,326,000)us-gaap_DeferredTaxAssetsValuationAllowance | (5,968,000)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred | 0 us-gaap_DeferredTaxAssetsNet | 0 us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities [Abstract] |  |
Deferred Tax Liability Inventory | 0 lgl_DeferredTaxLiabilityInventory | 0 lgl_DeferredTaxLiabilityInventory
Fixed assets | 285,000 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 375,000 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Deferred Tax Liability Other Accruals | 0 lgl_DeferredTaxLiabilityOtherAccruals | 0 lgl_DeferredTaxLiabilityOtherAccruals
Deferred Tax Liability, Stock-Based Compensation | 0 lgl_DeferredTaxLiabilityStockBasedCompensation | 0 lgl_DeferredTaxLiabilityStockBasedCompensation
Undistributed foreign earnings | 86,000 us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings | 14,000 us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
Other | 75,000 us-gaap_DeferredTaxLiabilitiesOther | 75,000 us-gaap_DeferredTaxLiabilitiesOther
Total deferred income tax liabilities | 446,000 us-gaap_DeferredIncomeTaxLiabilities | 464,000 us-gaap_DeferredIncomeTaxLiabilities
Deferred tax assets (liabilities), net | 0 us-gaap_DeferredTaxAssetsLiabilitiesNet | 0 us-gaap_DeferredTaxAssetsLiabilitiesNet
Current: |  |
Federal | 0 us-gaap_CurrentFederalTaxExpenseBenefit | 0 us-gaap_CurrentFederalTaxExpenseBenefit
State and local | 5,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 3,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign | (9,000)us-gaap_CurrentForeignTaxExpenseBenefit | 23,000 us-gaap_CurrentForeignTaxExpenseBenefit
Total Current | (4,000)us-gaap_CurrentIncomeTaxExpenseBenefit | 26,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred: |  |
Federal | (985,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (1,463,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State and local | (381,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (51,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Deferred Foreign Income Tax Expense (Benefit) | 8,000 us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (225,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total before change in valuation allowance | (1,358,000)lgl_TotalBeforeChangeInValuationAllowance | (1,739,000)lgl_TotalBeforeChangeInValuationAllowance
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance | 1,358,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 5,661,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Net deferred | 0 us-gaap_DeferredIncomeTaxExpenseBenefit | 3,922,000 us-gaap_DeferredIncomeTaxExpenseBenefit
Reconciliation of provision (benefit) for income taxes [Abstract] |  |
Tax provision at expected statutory rate | (962,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (1,452,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
State taxes, net of federal benefit | (57,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (38,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Permanent differences | (5,000)us-gaap_IncomeTaxReconciliationNondeductibleExpense | 25,000 us-gaap_IncomeTaxReconciliationNondeductibleExpense
Credits | (56,000)us-gaap_IncomeTaxReconciliationTaxCredits | (184,000)us-gaap_IncomeTaxReconciliationTaxCredits
Foreign tax expense, and other | (282,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (64,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Change in valuation allowance for utilization of Georgia State net operating loss | 1,358,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 5,661,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Provision (benefit) for income taxes | (4,000)us-gaap_IncomeTaxExpenseBenefit | 3,948,000 us-gaap_IncomeTaxExpenseBenefit
(Loss) income before income taxes from domestic operations | (2,832,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | (2,872,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Profit before income taxes from foreign operations | 4,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (1,399,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Earnings of Company's foreign subsidiaries not considered to be indefinitely reinvested | (47,000)lgl_EarningsOfForeignSubsidiariesNotConsideredToBeIndefinitelyReinvested |
Earnings of non-U.S. subsidiaries considered to be indefinitely reinvested | 509,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |
Research and Development Credit Carryforwards [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward amount | 1,285,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember |
Expiration date | Dec. 31, 2034 |
Foreign Tax Credit Carryforward [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward amount | 359,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_TaxCreditCarryforwardAxis = lgl_ForeignTaxCreditCarryforwardMember |
Expiration date | Dec. 31, 2020 |
Federal [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carryforwards | 9,471,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |
State [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carryforwards | $ 21,780,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |

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