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Balance Sheet Details (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, plant and equipment, net
Property, plant and equipment, gross	$ 140,306	$ 141,109
Less accumulated depreciation and amortization	(83,278)	(86,806)
Property, plant and equipment, net	57,028	54,303
Depreciation expense	10,745	13,275	$ 12,965
Building
Property, plant and equipment, net
Property, plant and equipment, gross	40,320	40,320
Computer software
Property, plant and equipment, net
Property, plant and equipment, gross	26,127	18,424
Computer equipment
Property, plant and equipment, net
Property, plant and equipment, gross	37,223	36,607
Furniture and fixtures
Property, plant and equipment, net
Property, plant and equipment, gross	16,286	16,881
Leasehold improvements
Property, plant and equipment, net
Property, plant and equipment, gross	10,824	10,110
Machinery
Property, plant and equipment, net
Property, plant and equipment, gross	9,097	16,936
Construction in progress
Property, plant and equipment, net
Property, plant and equipment, gross	$ 429	$ 1,831

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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