Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 30, 2023	Apr. 28, 2023	Mar. 31, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Common stock, par value (in usd per share)			$ 0.001	$ 0.001
Subsequent Event
Subsequent Event [Line Items]
Common stock, par value (in usd per share)		$ 0.001
Subsequent Event | Astellas | IVERIC bio, Inc.
Subsequent Event [Line Items]
Share price (in usd per share)		$ 40.00
Extension period		90 days
Automatic extension period		90 days
Termination fee		$ 222.4
Acquisition termination threshold		50.00%
Proposal termination period		1 year
Subsequent Event | Program
Subsequent Event [Line Items]
Received	$ 11.8
Sold	139.3
Maximum lifetime benefit	$ 20.0