Stockholders' Equity - Equity Capital Raising Activities (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Issuance of stock	$ 54,436
Common Stock
Class of Stock [Line Items]
Issuance of stock	6
Series C Preferred Stock
Class of Stock [Line Items]
Issuance of stock	$ 0	$ 28,173
2021 Common stock ATM Sales Agreement | Common Stock
Class of Stock [Line Items]
Shares issued (in shares)	6,162		17,915
Price per share (in dollars per share)	$ 8.83		$ 11.13
Issuance of stock	$ 54,436		$ 199,444
Preferred C ATM Sales Agreement | Series C Preferred Stock
Class of Stock [Line Items]
Shares issued (in shares)			1,500
Price per share (in dollars per share)			$ 24.38
Issuance of stock			$ 36,585
Common stock ATM Sales Agreement | Common Stock
Class of Stock [Line Items]
Shares issued (in shares)			10,713
Price per share (in dollars per share)			$ 12.07
Issuance of stock			$ 129,336