Balance Sheet Details (Property and Equipment) (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 15,212,000	$ 12,445,000
Less: accumulated depreciation	(10,872,000)	(10,225,000)
Property and equipment, net	4,340,000	2,220,000
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	10,521,000	7,754,000
Office and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	451,000	451,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	817,000	817,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,423,000	$ 3,423,000