Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

	December 31,		June 30,
	2018		2019
	(In thousands)
Raw materials	$	2,661	$	3,223
Work in process		11,130		11,409
Finished products		3,311		3,198
Total	$	17,102	$	17,830