Balance Sheet Components (Schedule Of Property And Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 4,290	$ 4,052
Less: Accumulated depreciation and amortization	(1,699)	(1,486)
Equipment, net	2,591	2,566
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	2,482	2,248
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	792	677
Furniture, Fixtures, And Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	789	466
Software [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	117	118
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 110	$ 543

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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