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Licenses, Patents, and Technology (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]    
Licenses $ 320 $ 320
Patent costs 133 133
LabCorp Technology Agreement 260 260
Finite-Lived Intangible Assets, Gross, Total 713 713
Less accumulated amortization (713) (713)
Total       [1]
[1] Derived from audited information