Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

	December 31,		September 30,
	2016		2017
	(In thousands)
Raw materials	$	2,743	$	2,867
Work in process		8,988		9,684
Finished products		3,243		2,762
Total	$	14,974	$	15,313