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4. Intangible Assets and Goodwill (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Intangible assets $ 1,380 $ 1,536
Goodwill 0 968
Patents [Member]    
Intangible assets 826 906
In-process research and development [Member]    
Intangible assets $ 554 $ 630