Balance Sheet Components (PPE) (Details) - USD ($)	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	$ 27,714,000		$ 27,714,000		$ 26,811,000
Less accumulated depreciation	(13,730,000)		(13,730,000)		(11,870,000)
Property and equipment, net	13,984,000		13,984,000		14,941,000
Depreciation expense	900,000	$ 700,000	1,900,000	$ 1,500,000
Impairments			0	$ 0
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,361,000		6,361,000		6,264,000
Manufacturing equipment and tooling
Property Plant And Equipment [Line Items]
Property and equipment, gross	11,714,000		11,714,000		11,259,000
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,771,000		1,771,000		1,690,000
Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,668,000		6,668,000		6,393,000
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,200,000		$ 1,200,000		$ 1,205,000