Fair Value Measurements and Investments - Schedule of Valuation Methodology and Unobservable Inputs for Level 3 Assets and Liabilities Measured at Fair Value (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Spinal Kinetics [Member] | Revenue Discount Rate
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Consideration transferred	$ 986
Spinal Kinetics [Member] | Revenue Discount Rate | Minimum [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Business combination contingent consideration liability measurement input	5.9
Spinal Kinetics [Member] | Revenue Discount Rate | Maximum [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Business combination contingent consideration liability measurement input	7.3
Spinal Kinetics [Member] | Payment Discount Rate | Minimum [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Business combination contingent consideration liability measurement input	7.6
Spinal Kinetics [Member] | Payment Discount Rate | Maximum [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Business combination contingent consideration liability measurement input	8.9
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
Increase (decrease) in fair value recognized in acquisition-related amortization and remeasurement	(16,214)	300
Payment made		(15,000)
Spinal Kinetics contingent consideration estimated fair value at June 30	986	$ 20,700
Neo Medical [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Neo Medical Convertible Loan	$ 5,820
Fair value implied volatility	73.40%
Fair value discount rate	17.00%