Inventories (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were as follows:

(U.S. Dollars, in thousands)	June 30, 2017		December 31, 2016
Raw materials	$	5,049	$	7,978
Work-in-process		11,339		9,505
Finished products		55,706		42,434
Deferred cost of sales		3,775		3,429
	$	75,869	$	63,346