Commitments and Contingencies - Additional Information (Detail)			1 Months Ended				3 Months Ended	9 Months Ended
	Aug. 01, 2022 USD ($)	Nov. 01, 2021 USD ($)	Oct. 31, 2021 USD ($)	Aug. 31, 2020 USD ($) ft²	Dec. 31, 2016 USD ($) ft²	Mar. 31, 2015 USD ($) ft²	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Apr. 27, 2018 Patent	Dec. 09, 2016 Patent
Other Commitments [Line Items]
Additional operating lease assets											$ 2,900,000
Additional operating lease liabilities											$ 2,900,000
Standard product warranty, description								limited one- to five-year warranty
Contingent liabilities							$ 20,000,000.0	$ 20,000,000.0	$ 20,000,000.0	$ 20,000,000.0
Other contingent liabilities							0	$ 0		$ 0
Boston Scientific Corporation [Member]
Other Commitments [Line Items]
Contingent liabilities									20,000,000.0
Patent infringement lawsuit allegation against number of patents | Patent												9	10
Amount awarded by jury		$ 20,000,000.0							$ 20,000,000.0
Payment received pursuant to legal settlement	$ 85,000,000.0						$ 85,000,000.0
Costa Rica [Member]
Other Commitments [Line Items]
Lease agreement, commencement period				2020-08
Area of office space | ft²				35,411
Lease agreement, effective date				Apr. 30, 2021
Lease agreement, expiration date				Jun. 30, 2031
Lease agreement, lease expense				$ 3,900,000
Redwood Office Agreement [Member]
Other Commitments [Line Items]
Lease agreement, commencement period								2015-03
Area of office space | ft²						50,000
Lease agreement, effective date						Jun. 30, 2015
Lease agreement, expiration period						2022-05
Lease expense, payment due						$ 2,000,000.0
Annual lease expense payable in final year of lease term						$ 2,400,000
Redwood Office Agreement Additional Expansion Premises [Member] | Amendment 1 [Member]
Other Commitments [Line Items]
Area of office space | ft²					50,000
Lease expense, payment due					$ 1,200,000
Annual lease expense payable in final year of lease term					$ 2,900,000
Commencement date description								The lease for the Expansion Premises commenced on June 1, 2018
Lease commencement date					Jun. 01, 2018
Lease agreement, expiration date					May 31, 2025
Non-cancellable Facility Lease [Member]
Other Commitments [Line Items]
Lease agreement, effective date								Mar. 01, 2017
Lease agreement, expiration date								Feb. 28, 2022
Lease agreement, lease expense								$ 400,000
Non-cancellable Facility Lease [Member] | Amendment 1 [Member]
Other Commitments [Line Items]
Lease agreement, expiration date			May 31, 2025
Lease agreement, lease expense			$ 400,000