Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were as follows:

(U.S. Dollars, in thousands)	September 30, 2018		December 31, 2017
Raw materials	$	8,488	$	6,067
Work-in-process		11,774		12,487
Finished products		59,633		60,441
Deferred cost of sales		—		2,335
Inventories	$	79,895	$	81,330