Other Financial Statement Details - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 101	$ 54
Less accumulated depreciation and amortization	(68)	(35)
Total	33	19
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	72	53
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 29	$ 1

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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