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Balance Sheet Components -Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,797		$ 9,797		$ 9,788
Less: Accumulated depreciation	(8,821)		(8,821)		(8,724)
Property and equipment, net	976		976		1,064
Depreciation (less than $0.1 million for both periods)	100	$ 100	96	$ 153
Machinery, equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,443		4,443		4,434
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,952		2,952		2,952
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,402		$ 2,402		$ 2,402

X

- Definition

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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