Balance Sheet Details Property Plant & Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balance Sheet Details [Abstract]
Buildings and Land Gross	$ 2,584	$ 5,024
Machinery and Equipment, Gross	23,493	21,683
Furniture and Fixtures, Gross	2,699	3,414
Computer Equipments And Software Gross	5,204	5,304
Leasehold Improvements, Gross	8,116	7,884
Property, Plant and Equipment, Gross	42,096	43,309
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(30,238)	(30,963)
Property, Plant and Equipment, Net	11,858	12,346
Depreciation	$ 3,677	$ 3,951	$ 4,686