Operations - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) Product _People Case	Dec. 31, 2020 USD ($)
Operations [Line Items]
Number of products approved | Product	4
Number of commercial products | Product	2
Cash and cash equivalents | $	$ 127,630	$ 44,909
YUTIQ [Member]
Operations [Line Items]
Number of new cases of blindness annually | Case	30,000
YUTIQ [Member] | Minimum [Member]
Operations [Line Items]
Number of people affected by posterior segment of eye in U.S. each year | _People	60,000
YUTIQ [Member] | Maximum [Member]
Operations [Line Items]
Number of people affected by posterior segment of eye in U.S. each year | _People	100,000