XML 41 R44.htm IDEA: XBRL DOCUMENT v2.4.0.6
Intangible Assets (Schedule of Net Book Value of Intangible Assets) (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Year
Dec. 31, 2011
Jun. 30, 2011
Intangible Assets [Line Items]      
Net book value of intangible assets $ 4,226 $ 4,596 $ 21,564
Estimated remaining useful life 5.5    
Durasert
      
Intangible Assets [Line Items]      
Net book value of intangible assets 2,912   6,845
Estimated remaining useful life 5.5    
BioSilicon
      
Intangible Assets [Line Items]      
Net book value of intangible assets $ 1,314   $ 14,719
Estimated remaining useful life 5.5