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Inventories (Tables)
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories were as follows:

 

(U.S. Dollars, in thousands)

 

March 31,

2015

 

 

December 31,

2014

 

 

 

 

 

 

 

 

 

 

Raw materials

 

$

3,868

 

 

$

3,879

 

Work-in-process

 

 

4,441

 

 

 

4,830

 

Finished products

 

 

42,445

 

 

 

45,612

 

Deferred cost of sales

 

 

5,955

 

 

 

5,525

 

Total inventory

 

$

56,709

 

 

$

59,846