Revenue - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues		$ 7,323	$ 7,489
YUTIQ [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	[1]	3,029	3,575
DEXYCU [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	[2]	3,773	1,112
Product [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues		$ 6,802	$ 4,687

[1] Included approximately $5,000 and $0 of revenue from YUTIQ product sales to Ocumension for the three months ended March 31, 2021 and 2020, respectively.

[2] No revenue was recognized from DEXYCU product sales to Ocumension for the three months ended March 31, 2021 and 2020.