Revenue - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues		$ 9,013	$ 4,122	$ 16,336	$ 11,611
YUTIQ [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	[1]	4,166	2,879	7,196	6,454
DEXYCU [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	[2]	4,572	827	8,344	1,939
Product [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues		$ 8,738	$ 3,706	$ 15,540	$ 8,393

[1] Included approximately $14,000 and $11,000 of revenue from YUTIQ product sales to Ocumension for the three months ended June 30, 2021 and 2020, respectively. Included approximately $19,000 and $11,000 of revenue from YUTIQ product sales to Ocumension for the six months ended June 30, 2021 and 2020, respectively.

[2] No revenue was recognized from DEXYCU product sales to Ocumension for the three and six months ended June 30, 2021 and 2020.