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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities    
Net loss $ (4,628,000)us-gaap_NetIncomeLoss $ (1,869,000)us-gaap_NetIncomeLoss
Add back: Income from discontinued operations    631,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Loss from continuing operations (4,628,000)us-gaap_IncomeLossFromContinuingOperations (2,500,000)us-gaap_IncomeLossFromContinuingOperations
Adjustment to reconcile net loss from continuing operations to net cash used in operating activities:    
Depreciation and amortization 3,003,000us-gaap_DepreciationAndAmortization 3,538,000us-gaap_DepreciationAndAmortization
Loss on receivable financing    348,000us-gaap_GainLossOnSaleOfAccountsReceivable
Loss on disposal of assets    11,000us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Amortization of warrants - stock compensation expense 150,000tlx_AmortizationOfWarrants   
Gain on debt extinguishment    (10,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
Change in warrant liabilities (43,000)tlx_ChangeInWarrantLiabilitiesNetWarrantsExercised (1,134,000)tlx_ChangeInWarrantLiabilitiesNetWarrantsExercised
Changes in operating assets and liabilities:    
Receivables (412,000)us-gaap_IncreaseDecreaseInAccountsReceivable (463,000)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories 712,000us-gaap_IncreaseDecreaseInInventories (55,000)us-gaap_IncreaseDecreaseInInventories
Prepaids and other assets 891,000us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (911,000)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Restricted cash (212,000)us-gaap_IncreaseDecreaseInRestrictedCashAndInvestments   
Accounts payable and accrued liabilities (58,000)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 286,000us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Deferred pension liability and other (1,020,000)us-gaap_IncreaseDecreaseInDeferredPensionCosts (313,000)us-gaap_IncreaseDecreaseInDeferredPensionCosts
Net cash used in operating activities (1,617,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (1,203,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities    
Equipment manufactured for rental (44,000)us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment (94,000)us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment
Purchases of property and equipment (83,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (199,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities (127,000)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (293,000)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities    
Payments of long-term debt (61,000)us-gaap_RepaymentsOfLongTermDebt (1,060,000)us-gaap_RepaymentsOfLongTermDebt
Proceeds from issuance of restricted stock and warrants 2,300,000tlx_ProceedsFromIssuanceOfRestrictedStockAndWarrants 1,000,000tlx_ProceedsFromIssuanceOfRestrictedStockAndWarrants
Proceeds from receivable financing    887,000us-gaap_ProceedsFromSaleOfFinanceReceivables
Payments for reverse/forward stock split    (66,000)tlx_PaymentsForStockSplit
Proceeds from exercise of warrants 100,000us-gaap_ProceedsFromWarrantExercises 27,000us-gaap_ProceedsFromWarrantExercises
Net cash provided by financing activities 2,339,000us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 788,000us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Cash flows from discontinued operations    
Cash used in operating activities of discontinued operations    (1,171,000)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
Cash provided by investing activities of discontinued operations    2,493,000us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
Cash used in financing activities of discontinued operations    (1,723,000)us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
Net cash used in discontinued operations    (401,000)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Net increase (decrease) in cash and cash equivalents 595,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (1,109,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of year 55,000us-gaap_CashAndCashEquivalentsAtCarryingValue 1,164,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of year 650,000us-gaap_CashAndCashEquivalentsAtCarryingValue 55,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of cash flow information:    
Interest paid 31,000us-gaap_InterestPaid 73,000us-gaap_InterestPaid
Income taxes paid      
Supplemental non-cash financing activities:    
Exchange of Debt for Common Stock 1,055,000tlx_ExchangeOfDebtForCommonStock  
8¼% Limited Convertible Senior Subordinated Notes Due 2012 [Member]    
Supplemental non-cash financing activities:    
Exchange of 8¼% Notes for Common Stock    $ 13,000us-gaap_DebtConversionConvertedInstrumentAmount1
/ us-gaap_LongtermDebtTypeAxis
= tlx_EightAndOneForthPercentLimitedConvertibleSeniorSubordinatedNotesDue2012Member