Inventory (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventory consisted of the following at December 31 (in thousands):

	2017		2016
Raw materials	$	5,743	$	4,277
Work in process	4,845		4,046
Finished goods	9,469		5,489
Total inventory	$	20,057	$	13,812