Engineering Development (Annual) (Detail) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2010	Dec. 31, 2011	Dec. 31, 2010
Engineering Development Expenses		$ 187,000	$ 670,000
Write-off Engineering Software	$ 456,000

Total amount of Engineering Development expenses included in general and administrative expenses during the period

No definition available.

Name:	tlx_EngineeringDevelopmentExpenses
Namespace Prefix:	tlx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration