Condensed Consolidated Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Public Utility, Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,382		$ 1,277
Less: accumulated depreciation	(847)		(780)
Property and equipment, net	535		497
Depreciation expense	68	$ 128
Computer equipment
Public Utility, Property, Plant and Equipment [Line Items]
Property and equipment	335		336
Furniture and fixtures
Public Utility, Property, Plant and Equipment [Line Items]
Property and equipment	632		621
Leasehold improvements
Public Utility, Property, Plant and Equipment [Line Items]
Property and equipment	$ 415		$ 320

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 amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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