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Other Income (Expense), Net (Tables)
 12 Months Ended
Dec. 31, 2015
Other Income and Expenses [Abstract]  
Components of Other Income

The major changes in the components of Other income (expense), net for the years ended December 31 were as follows (in thousands):

 

     2015      2014      2013  

Interest income

    $ 47       $ 80       $ 97   

Foreign currency losses, net

      (161 )       (196 )       (94 ) 

Gain on disposal of equipment

      60         22         26   

Credit gains (losses) on available for sale securities

      12         311         (78 ) 

Other

      67         51         51   
  

 

 

     

 

 

     

 

 

  
   $ 25       $ 268       $ 2