Long-Term Debt (Details) (USD $)	3 Months Ended
Mar. 31, 2015
Scenario, Previously Reported [Member] \| Mortgages [Member]
Long-Term Debt (Details) [Line Items]
Mortgage Loans on Real Estate, Interest Rate	6.50%
Compensating Balance, Amount	$ 200,000
Scenario, Actual [Member] \| Mortgages [Member]
Long-Term Debt (Details) [Line Items]
Mortgage Loans on Real Estate, Interest Rate	5.95%
Compensating Balance, Amount	100,000
8¼% Limited Convertible Senior Subordinated Notes Due 2012 [Member]
Long-Term Debt (Details) [Line Items]
Convertible Notes Payable	1,100,000
Debt Instrument, Periodic Payment, Interest	418,000
Debt Instrument, Frequency of Periodic Payment	semi-annual
Debt Instrument, Periodic Payment	1,400,000
Debt Instrument, Debt Default Payable, Percentage	25.00%
9½% Subordinated Debentures Due 2012 [Member]
Long-Term Debt (Details) [Line Items]
Convertible Notes Payable	334,000
Debt Instrument, Periodic Payment, Interest	50,000
Debt Instrument, Frequency of Periodic Payment	semi-annual
Debt Instrument, Periodic Payment	790,000
Debt Instrument, Debt Default Payable, Percentage	25.00%
Debt Instrument, Debt Default, Sinking Fund Payment	106,000
Mortgages [Member]
Long-Term Debt (Details) [Line Items]
Debt Instrument, Frequency of Periodic Payment	monthly installments
Mortgage Loans on Real Estate, Face Amount of Mortgages	383,000
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	68,000
Mortgage Loans on Real Estate, Interest Rate	5.95%
Compensating Balance, Amount	$ 100,000
Debt Instrument, Maturity Date	Mar. 01, 2015
Mortgage Extension Period	5 years

Debt instruments default amount payable percentage.

No definition available.

Name:	tlx_DebtInstrumentDebtDefaultPayablePercentage
Namespace Prefix:	tlx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount not remitted into a fund, which is used to retire the debt instrument.

+ References

No definition available.

+ Details

Name:	tlx_DebtInstrumentDebtDefaultSinkingFundPayment
Namespace Prefix:	tlx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	tlx_LongTermDebtDetailsLineItems
Namespace Prefix:	tlx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The extension period on the mortgage facility.

+ References

No definition available.

+ Details

Name:	tlx_MortgageExtensionPeriod
Namespace Prefix:	tlx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability.

+ References

+ Details

Name:	us-gaap_CompensatingBalanceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

+ Details

Name:	us-gaap_ConvertibleNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the required periodic payments applied to interest.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

+ References

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tlx_EightAndOneForthPercentLimitedConvertibleSeniorSubordinatedNotesDue2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tlx_NineAndHalfPercentSubordinatedDebenturesDue2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioActualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: