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Balance Sheet Details - Property and Equipment, net (Details) - USD ($) $ in Thousands	Oct. 02, 2021	Dec. 31, 2020
Summary of property and equipment, net
Property and equipment, gross	$ 66,832	$ 66,239
Accumulated depreciation and amortization	(45,872)	(45,858)
Property and equipment, net	20,960	20,381
Test equipment
Summary of property and equipment, net
Property and equipment, gross	38,876	37,670
Software
Summary of property and equipment, net
Property and equipment, gross	14,440	16,093
Computer equipment
Summary of property and equipment, net
Property and equipment, gross	10,594	9,062
Furniture and fixtures
Summary of property and equipment, net
Property and equipment, gross	1,733	2,069
Leasehold improvements
Summary of property and equipment, net
Property and equipment, gross	$ 1,189	$ 1,345

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- Definition

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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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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