Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were as follows:

(U.S. Dollars, in thousands)	March 31, 2017		December 31, 2016
Raw materials	$	3,966	$	7,978
Work-in-process		11,564		9,505
Finished products		47,109		42,434
Deferred cost of sales		3,632		3,429
	$	66,271	$	63,346