Balance Sheet Components - Property and Equipment Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Property and Equipment, Net
Total property and equipment, gross	$ 17,155	$ 16,390
Less: accumulated depreciation	(13,484)	(13,170)
Total property and equipment, net	3,671	3,220	$ 3,220
Depreciation and amortization expense	400	400
Manufacturing equipment
Property and Equipment, Net
Total property and equipment, gross	14,814	14,199
Computer and network equipment
Property and Equipment, Net
Total property and equipment, gross	608	602
Furniture and fixtures
Property and Equipment, Net
Total property and equipment, gross	113	113
Construction in Progress
Property and Equipment, Net
Total property and equipment, gross	144
Leasehold improvements
Property and Equipment, Net
Total property and equipment, gross	$ 1,476	$ 1,476