Balance Sheet Components - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 36,543	$ 31,046
Less: accumulated depreciation and amortization		(12,298)	(8,748)
Property and equipment, net		24,245	22,298
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		2,563	2,494
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		405	1,115
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		2,980	2,423
Capitalized Surgical Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	[1]	18,936	14,253
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		1,103	1,020
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		10,122	9,425
Software and Website Development [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 434	$ 316

[1] 1 Capitalized surgical equipment includes $15.7 million and $12.2 million that is ready for its intended use and have started depreciating and $3.2 million and $2.1 million that is not ready for its intended use and have not started depreciation as of June 30, 2024 and December 31, 2023, respectively.