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Balance Sheet Components - Property and Equipment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Property and Equipment
Property and equipment, gross	$ 3,541,000		$ 3,541,000		$ 2,869,000
Less: accumulated depreciation and amortization	(2,711,000)		(2,711,000)		(2,649,000)
Property and equipment, net	830,000		830,000		220,000
Depreciation expense	34,000	$ 29,000	63,000	$ 51,000
Laboratory equipment
Property and Equipment
Property and equipment, gross	2,996,000		2,996,000		2,646,000
Computer equipment and purchased software
Property and Equipment
Property and equipment, gross	212,000		212,000		190,000
Leasehold improvements
Property and Equipment
Property and equipment, gross	33,000		33,000		$ 33,000
Construction in progress
Property and Equipment
Property and equipment, gross	$ 300,000		$ 300,000

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Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

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