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Other Balance Sheet Details - Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment	$ 75,473	$ 62,140
Less accumulated depreciation	(33,559)	(28,271)
Total property and equipment, net	41,914	33,869
Tenant improvements
Property, Plant and Equipment [Line Items]
Property and equipment	26,342	19,857
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	3,188	2,968
Scientific equipment
Property, Plant and Equipment [Line Items]
Property and equipment	33,483	28,163
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 12,460	$ 11,152

X

- 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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