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 (Loss) Income	Retained Earnings (Deficit)
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 on RMBS and CMBS	(12,987)				(12,987)
Dividends paid on common stock	(11,290)					(11,290)
Net income (loss)	(43,541)					(43,541)
Balance at end of period at Mar. 31, 2022	421,436	$ 101	252	474,378	(9,987)	(43,308)
Balance at beginning of period at Dec. 31, 2022	236,479		249	475,379	(21,127)	(218,022)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash equity compensation	541			541
Unrealized gain on RMBS and CMBS	14,804				14,804
Dividends paid on common stock	(7,976)					(7,976)
Net income (loss)	530					530
Balance at end of period at Mar. 31, 2023	$ 244,378		$ 249	$ 475,920	$ (6,323)	$ (225,468)