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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The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 226,755		$ 226,755		$ 210,449
Less: Accumulated depreciation and amortization	(148,203)		(148,203)		(127,693)
Property and equipment, net	78,552		78,552		82,756
Depreciation and amortization expense	10,500	$ 16,700	21,000	$ 30,100
Tooling and manufacturing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	116,368		116,368		103,177
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	20,755		20,755		19,922
Purchased and internally-developed software
Property, Plant and Equipment [Line Items]
Total property and equipment	29,454		29,454		27,424
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 60,178		$ 60,178		$ 59,926