Fair Value Measurements and Investments - Schedule of Valuation Methodology and Unobservable Inputs for Level 3 Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Spinal Kinetics [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Spinal Kinetics contingent consideration estimated fair value at January 1	$ 17,200	$ 35,400
Decrease in fair value recognized in acquisition-related amortization and remeasurement	(17,200)	(2,000)
Payment made		(15,000)
Spinal Kinetics contingent consideration estimated fair value at September 30		$ 18,400
Neo Medical [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Neo Medical Convertible Loan	$ 5,600
Fair value implied volatility	70.20%
Fair value discount rate	17.40%