Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were as follows:

(U.S. Dollars, in thousands)	March 31, 2016		December 31, 2015
Raw materials	$	3,923	$	4,976
Work-in-process		5,593		5,087
Finished products		46,066		42,947
Deferred cost of sales		4,205		4,553
Total inventory	$	59,787	$	57,563