BALANCE SHEET COMPONENTS - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 110,886	$ 78,648
Less: accumulated depreciation and amortization	(35,216)	(22,704)
Total property and equipment, net	75,670	55,944
Laboratory and manufacturing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	4,911	3,192
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,315	2,269
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	4,119	4,174
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	23,144	20,401
Internal-use software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	44,877	30,922
Internal-use software in development
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	28,069	15,739
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 3,451	$ 1,951