Subsequent Events - Additional Information (Detail) - Sparing Vision [Member] - Subsequent Event [Member] $ in Millions	1 Months Ended
Oct. 31, 2021 USD ($)
Subsequent Event [Line Items]
Equity method investment, ownership percentage	10.00%
Development and commercial milestone payment to be received	$ 200
Collaboration description	For product candidates the Company chooses to option, it will pay an opt-in fee, reimburse certain costs, share in 50% of development costs and pay royalties to SparingVision on U.S. sales.

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant