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Patents and Licensed Technologies, net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Patents and Licensed Technologies [Abstract]      
Patents and licensed technologies, net $ 12,020 [1]   $ 12,673
Estimated amortization expense for amortizable patents and licensed technologies assets [Abstract]      
Patents and licensed technologies, net 12,020 [1]   12,673
Patents and Licensed Technologies [Member]
     
Patents and Licensed Technologies [Abstract]      
Gross Amount beginning of period 15,411 15,124 15,124
Additions 18   181
Translation differences (193)   106
Gross Amount end of period 15,236   15,411
Accumulated amortization (3,216)   (2,738)
Patents and licensed technologies, net 12,020   12,673
Amortization expense 509 507  
Estimated amortization expense for amortizable patents and licensed technologies assets [Abstract]      
Last nine months of 2013 1,524    
2014 2,032    
2015 2,025    
2016 1,946    
2017 878    
Thereafter 3,615    
Patents and licensed technologies, net $ 12,020   $ 12,673
[1] (unaudited)