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Share-based compensation (Tables)
3 Months Ended
Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-Based Compensation by Line Item in Consolidated Statements of Operations

The following table shows the detail of share-based compensation by line item in the condensed consolidated statements of operations:

 

     Three Months Ended
March 31,
 

(U.S. Dollars, in thousands)

   2014      2013  

Cost of sales

   $ 29       $ 287   

Sales and marketing

     444         436   

General and administrative

     642         1,175   

Research and development

     72         45   
  

 

 

    

 

 

 

Total

$ 1,187    $ 1,943