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Inventories
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories

4. Inventories

Inventories were as follows:

 

(U.S. Dollars, in thousands)

 

March 31,

2019

 

 

December 31,

2018

 

Raw materials

 

$

8,359

 

 

$

8,463

 

Work-in-process

 

 

10,442

 

 

 

13,478

 

Finished products

 

 

60,327

 

 

 

54,906

 

Inventories

 

$

79,128

 

 

$

76,847