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Share-based compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased 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

June 30,

 

 

Six Months Ended

June 30,

 

(U.S. Dollars, in thousands)

 

2015

 

 

2014

 

 

2015

 

 

2014

 

Cost of sales

 

$

112

 

 

$

29

 

 

$

223

 

 

$

58

 

Sales and marketing

 

 

296

 

 

 

429

 

 

 

601

 

 

 

873

 

General and administrative

 

 

1,301

 

 

 

657

 

 

 

2,570

 

 

 

1,299

 

Research and development

 

 

91

 

 

 

71

 

 

 

182

 

 

 

143

 

Total

 

$

1,800

 

 

$

1,186

 

 

$

3,576

 

 

$

2,373