Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended
	Apr. 27, 2022	Mar. 31, 2022	Mar. 31, 2021	Aug. 31, 2021	Jul. 31, 2020
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of common stock in at the market offering, net of issuance costs		$ 5,921,000	$ 34,272,000
Common stock
Subsidiary, Sale of Stock [Line Items]
Maximum aggregate offering price					$ 250,000,000
2020 Open Market Sales Agreement
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in at the market offering (shares)			4.9
Proceeds from issuance of common stock in at the market offering, net of issuance costs			$ 35,000,000
Weighted-average sales price per share			$ 7.09
2020 Open Market Sales Agreement | Common stock
Subsidiary, Sale of Stock [Line Items]
Maximum aggregate offering price					$ 100,000,000
2021 Open Market Sales Agreement
Subsidiary, Sale of Stock [Line Items]
Commission on sale of stock per agreement (percent)		3.00%
Issuance of common stock in at the market offering (shares)		5.9
Proceeds from issuance of common stock in at the market offering, net of issuance costs		$ 6,000,000
Weighted-average sales price per share		$ 1.02
2021 Open Market Sales Agreement | Common stock
Subsidiary, Sale of Stock [Line Items]
Maximum aggregate offering price				$ 150,000,000
2021 Open Market Sales Agreement | Subsequent event
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in at the market offering (shares)	8.3
Proceeds from issuance of common stock in at the market offering, net of issuance costs	$ 9,000,000
Weighted-average sales price per share	$ 1.09