Balance Sheet Components - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Inventory, finished goods, gross	$ 21,200		$ 21,200		$ 18,800
Inventory, work in process, gross	2,000		2,000		1,400
Property and equipment, gross	36,395		36,395		31,246
Depreciation expense	1,000	$ 1,200	2,100	$ 2,300
Construction in progress, surgical placement instrument set
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,300		6,300		3,500
Construction in progress, software costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 500		$ 500		$ 400