Balance Sheet Components (Schedule Of Property And Equipment, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,110	$ 4,858
Less: Accumulated depreciation	(2,556)	(2,396)
Property and equipment, net	2,554	2,462
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,519	2,519
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,310	1,019
Furniture, Fixtures, And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	932	932
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	264	202
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 85	$ 186

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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