Balance Sheet Components - Summary of Property and Equipment, Net (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Capitalized Surgical Equipment, Ready For Use [Member]
Property, Plant and Equipment [Line Items]
Capitalized surgical equipment	$ 32.0	$ 28.0
Capitalized Surgical Equipment, Not Ready For Use [Member]
Property, Plant and Equipment [Line Items]
Capitalized surgical equipment	$ 5.6	$ 5.1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details