Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property and Equipment, Net
Property and equipment, gross	$ 30,068	$ 25,771
Less: Accumulated depreciation and amortization	(12,489)	(10,207)
Property and equipment, net	17,579	15,564
Surgical equipment and instrument trays
Property and Equipment, Net
Property and equipment, gross	16,901	13,092
Machinery and equipment
Property and Equipment, Net
Property and equipment, gross	1,883	1,828
Construction in progress
Property and Equipment, Net
Property and equipment, gross	8,008	7,854
Computer and office equipment
Property and Equipment, Net
Property and equipment, gross	1,260	976
Leasehold improvements
Property and Equipment, Net
Property and equipment, gross	1,625	1,631
Furniture and fixtures
Property and Equipment, Net
Property and equipment, gross	$ 391	$ 390