Revenue - Disaggregation of Revenue (Parenthetical) (Detail) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenues		$ 11,565,000	$ 9,013,000	$ 20,859,000	$ 16,336,000
YUTIQ [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	[1]	7,421,000	4,166,000	12,032,000	7,196,000
YUTIQ [Member] | Ocumension Therapeutics [Member] | Supply Agreement [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		11,000	14,000	67,000	19,000
DEXYCU [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	[2]	3,897,000	4,572,000	8,296,000	8,344,000
DEXYCU [Member] | Ocumension Therapeutics [Member] | Supply Agreement [Member]
Disaggregation Of Revenue [Line Items]
Total revenues		$ 0	$ 0	$ 0	$ 0

[1] Included approximately $11 and $67 of revenue from YUTIQ product sales to Ocumension under a supply agreement for the three and six months ended June 30, 2022, respectively, and approximately $14 and $19 of revenue from YUTIQ product sales to Ocumension under a supply agreement for the three and six months ended June 30, 2021, respectively.

[2] No revenue was recognized from DEXYCU product sales to Ocumension under a supply agreement for the three and six months ended June 30, 2022, and no revenue was recognized from DEXYCU product sales to Ocumension for the three and six months ended June 30, 2021.