Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended				6 Months Ended		12 Months Ended
		Jan. 01, 2023 USD ($)	Jan. 01, 2022 USD ($)	Aug. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) subsidiary $ / shares shares	Mar. 31, 2023	Jun. 30, 2022 shares	Jun. 30, 2020 USD ($) series $ / shares shares	Jun. 30, 2023 USD ($) subsidiary $ / shares shares	Jun. 30, 2022 shares	Dec. 31, 2022 USD ($) $ / shares shares
Summary Of Significant Accounting Policies [Line Items]
Reclassification of available for sale debt securities to held to maturity		$ 83,000
Proceeds from issuance of private placement								$ 125,000
Number of preferred stock series issued | series								2
Number of warrants series issued | series								2
Warrant term (in years)								5 years
Class of warrant or right, outstanding (in shares) | shares					1,950,672		5,250,000	6,500,000	1,950,672	5,250,000
Investment warrants, exercise price (in dollars per share) | $ / shares								$ 10.00
Warrants original basis					$ 15,600			$ 9,500	$ 15,600
Reclass of conversion premium - convertible notes					314,711				314,711		$ 335,328
Convertible senior notes, net	[1]				$ (103,516)				$ (103,516)		$ (104,256)
Percentage of incentive fees payable in cash									100.00%
Number of shares available for distribution under the Director Plan (in shares) | shares					35,000				35,000
Percentage of shares vesting									5.00%
Minimum assets with banking institutions					$ 1,000,000				$ 1,000,000
Put option
Summary Of Significant Accounting Policies [Line Items]
Present value of put liability					$ 15,700			$ 50,700	$ 15,700
Put option liability term (in months)									39 months
Independent Directors
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount			$ 140
Percentage of annual retainer received in shares (in percent)			50.00%
Percentage of annual retainer received in cash (in percent)			50.00%		100.00%
Heads of Compensation and Corporate Governance Committees
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount			$ 15
Percentage of annual retainer received in cash (in percent)											100.00%
Audit Committee
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount			20
Percentage of annual retainer received in cash (in percent)											100.00%
Lead Director
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount					$ 20
Percentage of annual retainer received in cash (in percent)					100.00%
Special Committee
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount					$ 20
Lead Director of Special Committee
Summary Of Significant Accounting Policies [Line Items]
Annual retainer amount					30
Accounting Standards Update 2020-06
Summary Of Significant Accounting Policies [Line Items]
Convertible senior notes, net			(700)
Restricted stock | Board of Directors
Summary Of Significant Accounting Policies [Line Items]
Shares granted (in shares) | shares									2,000
Gregory Funding LLC | Servicing agreement
Summary Of Significant Accounting Policies [Line Items]
Percentage of fair market value of REO (in percent)									1.00%
Percentage of purchase price of REO (in percent)									1.00%
Renewal term (in years)									1 year
Thetis Asset Management LLC | Amended and restated management agreement
Summary Of Significant Accounting Policies [Line Items]
Period of common shares held as base management fee (at least) (in years)									3 years
Convertible notes payable
Summary Of Significant Accounting Policies [Line Items]
Unpaid principal balance					$ 103,500				$ 103,500		$ 104,500
Interest rate (in percent)					7.25%				7.25%
Principal amount of note (in dollars per share) | $ / shares									$ 25.00
Senior notes | 8.875% Senior Unsecured Notes Due September 2027
Summary Of Significant Accounting Policies [Line Items]
Interest rate (in percent)				8.875%
Aggregate principal				$ 110,000
Debt instrument, term (in years)				5 years
Issuance amount, amount of par value (percent)				0.99009
Number of subsidiaries (the "Guarantors") | subsidiary					2				2
Proceeds from unsecured notes payable				$ 106,100
Proceeds used to repurchase and retire securities					$ 90,000				$ 90,000
Amount outstanding					$ 110,000				$ 110,000		$ 110,000
Common stock | Convertible notes payable
Summary Of Significant Accounting Policies [Line Items]
Conversion rate									1.7405
Conversion price (in dollars per share) | $ / shares					$ 14.36				$ 14.36
Additional Paid-in Capital | Accounting Standards Update 2020-06
Summary Of Significant Accounting Policies [Line Items]
Reclass of conversion premium - convertible notes			$ (700)
Preferred stock - series A shares
Summary Of Significant Accounting Policies [Line Items]
Preferred stock, shares issued (in shares) | shares					424,949			2,307,400	424,949		424,949
Preferred stock, fixed-to-floating rate cumulative redeemable								7.25%	7.25%		7.25%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares					$ 25.00			$ 25.00	$ 25.00		$ 25.00
Preferred stock - series A shares | Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Stock repurchased and retired during period, shares (in shares) | shares							768,519			768,519	1,882,451
Preferred stock - series B shares
Summary Of Significant Accounting Policies [Line Items]
Preferred stock, shares issued (in shares) | shares					1,135,590			2,892,600	1,135,590		1,135,590
Preferred stock, fixed-to-floating rate cumulative redeemable						5.00%		5.00%	5.00%		5.00%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares					$ 25.00			$ 25.00	$ 25.00		$ 25.00
Preferred stock - series B shares | Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Stock repurchased and retired during period, shares (in shares) | shares							231,481			231,481	1,757,010
Maximum | Independent Directors
Summary Of Significant Accounting Policies [Line Items]
Percentage of annual retainer received in cash (in percent)			100.00%
Maximum | Gregory Funding LLC | Servicing agreement
Summary Of Significant Accounting Policies [Line Items]
Servicing fees (in percent)									1.25%
Minimum | Gregory Funding LLC | Servicing agreement
Summary Of Significant Accounting Policies [Line Items]
Servicing fees (in percent)									0.65%

[1] Secured borrowings, net are presented net of deferred issuance costs of $3.8 million at June 30, 2023 and $4.7 million at December 31, 2022. Convertible senior notes, net are presented net of deferred issuance costs of zero and $0.3 million at June 30, 2023 and December 31, 2022, respectively. Notes payable, net are presented net of deferred issuance costs and discount of $3.6 million at June 30, 2023 and $4.0 million at December 31, 2022.