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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
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Sep. 30, 2023 | Sep. 30, 2022
Spinal Kinetics [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration estimated fair value |  | $ 17,200
Decrease in fair value recognized in acquisition-related amortization and remeasurement |  | $ (17,200)
Lattus Spine [Member] |  |
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |
Consideration transferred | $ 9,100 |
Counterparty discount rate | 9.50% |
Revenue risk-adjusted discount rate | 7.00% |
Lattus Spine [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |
Contingent consideration estimated fair value | $ 11,200 |
Decrease in fair value recognized in acquisition-related amortization and remeasurement | (2,100) |
Contingent consideration estimated fair value at September 30 | 9,100 |
Neo Medical [Member] |  |
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |
Neo Medical Convertible Loan | $ 7,670 |
Fair value discount rate | 19.40% |
Estimated equity volatility | 80.60% |

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