Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were as follows:

(U.S. Dollars, in thousands)	September 30, 2017		December 31, 2016
Raw materials	$	5,269	$	7,978
Work-in-process		12,322		9,505
Finished products		58,964		42,434
Deferred cost of sales		3,569		3,429
	$	80,124	$	63,346