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Significant Accounting Policies - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 28, 2018 | Aug. 31, 2020 | Feb. 29, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Accumulated other comprehensive income to foreign currency translation |  |  |  | $ 841,000 | $ 841,000
Marketable securities |  |  |  | 33,000,000.0 | 0
Purchases of marketable securities |  |  |  | 33,000,000.0 |
Marketable securities matured |  |  |  | 0 |
Interest-bearing cash equivalent consisted of money market fund |  |  |  | 155,600,000 |
Interest-bearing cash equivalent consisted of investment-grade commercial paper |  |  |  | 16,500,000 |
Allowance for credit loss |  |  |  | $ 0 | $ 0
Pre Funded Warrants to purchase common stock |  |  |  | 3,272,727 |
Accounting Standards Update 2019-12 [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] |  |  |  | true |
Change in Accounting Principle, Accounting Standards Update, Adoption Date |  |  |  | Jan. 01, 2021 |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] |  |  |  | true |
Icon Bioscience Inc [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of accelerated milestone payment received |  |  |  |  | 20.00%
DEXYCU [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Accrued revenue-based royalty expense |  |  |  | $ 2,500,000 | $ 2,300,000
DEXYCU [Member] | Icon Bioscience Inc [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Accrued revenue-based royalty expense |  |  |  | $ 0 | $ 1,300,000
Percentage of accelerated milestone payment received |  | 20.00% |  |  |
Percentage of upfront payment received |  |  | 20.00% |  |
Finite-lived intangible asset, useful life | 13 years |  |  | 9 years 3 months |
Minimum [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Accounts receivable standard payment terms |  |  |  | 120 days |
Estimated useful lives of assets |  |  |  | 3 years |
Maximum [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Accounts receivable standard payment terms |  |  |  | 127 days |
Estimated useful lives of assets |  |  |  | 5 years |
Investment Instruments [Member] | Credit Concentration Risk [Member] | Money Market Funds [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 90.40% |
Investment Instruments [Member] | Credit Concentration Risk [Member] | Commercial Paper [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 9.60% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | ASD Specialty Healthcare LLC [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 38.30% | 56.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | McKesson Specialty Care Distribution LLC [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 54.70% | 37.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | ASD Specialty Healthcare LLC [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 43.10% | 39.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | McKesson Specialty Care Distribution LLC [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  | 46.60% | 18.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ocumension Therapeutics [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of concentration risk |  |  |  |  | 33.00%

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