Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock at Par	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance at beginning of period at Dec. 31, 2020	$ 248,309	$ 101	$ 0	$ 246,646	$ (1,039)	$ 2,601
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared - preferred	(4)					(4)
Unrealized gain (loss) on RMBS and CMBS	529				529
Equity contribution from common stockholder	56,261			56,261
Net (loss) income	9,487					9,487
Balance at end of period at Mar. 31, 2021	314,582	101	0	302,907	(510)	12,084
Balance at beginning of period at Dec. 31, 2021	491,390	101	252	476,510	3,000	11,527
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	(3,003)			(3,003)
Non-cash equity compensation	871			871
Dividends declared - preferred	(4)					(4)
Unrealized gain (loss) on RMBS and CMBS	(12,987)				(12,987)
Dividends paid on common stock	(11,290)			(11,290)
Net (loss) income	(43,541)					(43,541)
Balance at end of period at Mar. 31, 2022	$ 421,436	$ 101	$ 252	$ 463,088	$ (9,987)	$ (32,018)