Inventory (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Summary of Inventory

Inventory consisted of the following:

(in thousands)	March 31, 2019		December 31, 2018
Raw materials	$	7,733	$	7,855
Work in process		4,458		2,208
Finished goods		819		801
Total inventory	$	13,010	$	10,864