Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

As of June 30, 2019 and December 31, 2018, Inventories consisted of the following:

(in thousands)	June 30, 2019	December 31, 2018
Raw materials	$48,405	$40,489
Work in process	39,704	33,181
Finished goods	16,145	12,234
Total inventories	$104,254	$85,904