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Share-Based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	$ 2,368	$ 1,513
Research and Development, net
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	546	172
Clinical Operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	122	71
Sales and Marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	777	877
General and Administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	$ 923	$ 393

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

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+ References

No definition available.

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