Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2017

Balance Sheet Related Disclosures [Abstract]

Inventory Disclosure [Text Block]

Inventories consist of the following:

	As of December 31,
	2017		2016
	(In thousands)
Raw materials	$	2,976	$	3,773
Work in process	1,109		616
Finished goods	1,074		1,244
	$	5,159	$	5,633

Components of property, plant and equipment, net

Property, plant and equipment, net is comprised of the following:

	As of December 31,
	2017			2016
	(In thousands)
Building	$	40,320		$	40,320
Computer software	18,424			20,922
Computer equipment	36,607			36,608
Furniture and fixtures	16,881			15,140
Leasehold improvements	10,110			7,176
Machinery	16,936			17,406
Construction in progress	1,831			1,075
	141,109			138,647
Less accumulated depreciation and amortization	(86,806		)	(80,205		)
	$	54,303		$	58,442

Schedule of accumulated other comprehensive Income (Loss)

Accumulated other comprehensive gain (loss) is comprised of the following:

	As of December 31,
	2017			2016
	(In thousands)
Foreign currency translation adjustments	$	(5,593	)	$	(13,392	)
Unrealized gain (loss) on available-for-sale securities, net of tax	496			(116		)
Total	$	(5,097	)	$	(13,508	)