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Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended	6 Months Ended		7 Months Ended
	Jun. 18, 2021	Feb. 19, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 18, 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			$ 62,446,000	$ 0
At-the-market offering
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock in at-the-market offering (shares)	4.0	8.2	9.0		12.2
Proceeds from issuance of common stock in at-the-market offering, net of issuance costs			$ 63,800,000		$ 85,400,000
Weighted-average sales price per share			$ 7.10		$ 6.98
Commission on sale of stock per agreement (percent)			3.00%
Common stock
Subsidiary, Sale of Stock [Line Items]
Maximum aggregate offering price						$ 250,000,000.0
Common stock | At-the-market offering
Subsidiary, Sale of Stock [Line Items]
Maximum aggregate offering price						$ 100,000,000.0

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