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Product Revenue Reserves and Allowances - Disaggregation of Revenue (Parenthetical) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disaggregation Of Revenue [Line Items]    
Total revenues $ 36,939 $ 34,437
YUTIQ [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues [1] 16,959 13,878
YUTIQ [Member] | Ocumension Therapeutics [Member] | Supply Agreement [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues 25 205
DEXYCU [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues [2] 18,353 6,953
DEXYCU [Member] | Ocumension Therapeutics [Member] | Supply Agreement [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenues $ 283 $ 8
[1]

Included approximately $25 and $205 of revenue recognized from YUTIQ product sales to Ocumension under a supply agreement for the years ended December 31, 2021 and 2020, respectively.

[2]

Included approximately $283 and $8 of revenue recognized from DEXYCU product sales to Ocumension under a supply agreement for the years ended December 31, 2021 and 2020, respectively.