Fair Value Measurements and Investments - Additional Information (Detail) SFr in Millions, $ in Millions		1 Months Ended
	Apr. 30, 2018 USD ($)	Oct. 31, 2020 USD ($)	Oct. 31, 2021 USD ($)	Oct. 31, 2021 CHF (SFr)	Oct. 31, 2020 CHF (SFr)
Spinal Kinetics [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Milestone achievement period	5 years
Maximum [Member] | Spinal Kinetics [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Milestone payments	$ 60.0
US Food And Drug Administration [Member] | Spinal Kinetics [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Milestone payments	15.0
Revenue Milestone [Member] | Spinal Kinetics [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Milestone payments	$ 45.0
Neo Medical [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Convertible loans		$ 5.0	$ 0.7	SFr 0.6	SFr 4.6
Preferred Stock | Neo Medical [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amount of Preferred stock consideration		$ 5.0