CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)		6 Months Ended	12 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Preferred stock, par value per share (in dollars per share)		$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)		25,000,000	25,000,000
Common stock, par value per share (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares authorized (in shares)		125,000,000	125,000,000
Common stock, shares issued (in shares)		23,627,677	23,130,956
Common stock, shares outstanding (in shares)		23,627,677	23,130,956
Mortgage loans held-for-investment, net	[1],[2]	$ 961,277,000	$ 989,084,000
Allowance for beneficial interests credit losses		5,985,000	6,107,000
Property held-for-sale, valuation allowances		1,300,000	700,000
Basis			417,263,000
HTM, allowance for expected credit losses		0
Unrealized losses on debt securities available-for-sale transferred to held-to-maturity		(982,000)
Noncontrolling interest	[3]	2,129,000	2,137,000
Debt securities available-for-sale, at fair value
Basis		153,864,000	282,711,000
Debt securities accumulated unrealized gain (loss)		$ (11,800,000)	$ 25,600,000
2017-D
Ownership percentage by parent (as percent)		50.00%	50.00%
Ownership percentage by third parties (as percent)		50.00%	50.00%
AS Ajax E II LLC
Ownership percentage by parent (as percent)		53.10%	53.10%
Great Ajax II REIT
Ownership percentage by parent (as percent)		99.90%	99.90%
Mortgage loans
Mortgage loans held-for-investment, net		$ 652,258,000	$ 675,826,000
Secured Debt
Deferred issuance costs		(3,800,000)	(4,700,000)
Convertible Debt
Deferred issuance costs		0	(300,000)
Notes Payable
Deferred issuance costs		(3,600,000)	(4,000,000)
Consolidated entities
Mortgages held-for-investment		900,000	900,000
Consolidated entities | 2017-D
Noncontrolling interest		1,000,000	1,000,000
Consolidated entities | AS Ajax E II LLC
Noncontrolling interest		1,000,000	1,100,000
Consolidated entities | Great Ajax II REIT
Noncontrolling interest		100,000	100,000
Beneficial interests in securitization trusts
Allowance for beneficial interests credit losses		$ 0	$ 0
Common stock, par value $0.01 per share
Common stock, shares outstanding (in shares)		23,627,677	23,130,956
Accumulated net investment gain (loss) attributable to parent
Unrealized losses on debt securities available-for-sale transferred to held-to-maturity		$ (7,770,000)	$ 0
Preferred stock - series A shares
Preferred stock, fixed-to-floating rate cumulative redeemable		7.25%	7.25%
Preferred stock, liquidation preference per share (in dollars per share)		$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)		424,949	424,949
Preferred stock, shares outstanding (in shares)		424,949	424,949
Preferred stock - series B shares
Preferred stock, fixed-to-floating rate cumulative redeemable		5.00%	5.00%
Preferred stock, liquidation preference per share (in dollars per share)		$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)		1,135,590	1,135,590
Preferred stock, shares outstanding (in shares)		1,135,590	1,135,590

[1] As of both June 30, 2023 and December 31, 2022, balances for Mortgage loans held-for-investment, net include $0.9 million from a 50.0% owned joint venture, which the Company consolidates under U.S. Generally Accepted Accounting Principles ("U.S. GAAP" or "GAAP").

[2] Mortgage loans held-for-investment, net include $652.3 million and $675.8 million of loans at June 30, 2023 and December 31, 2022, respectively, transferred to securitization trusts that are variable interest entities (“VIEs”); these loans can only be used to settle obligations of the VIEs. Secured borrowings consist of notes issued by VIEs that can only be settled with the assets and cash flows of the VIEs. The creditors do not have recourse to the primary beneficiary (Great Ajax Corp.). See Note 9 — Debt. Mortgage loans held-for-investment, net include $6.0 million and $6.1 million of allowance for expected credit losses at June 30, 2023 and December 31, 2022, respectively.

[3] As of June 30, 2023, non-controlling interests includes $1.0 million from a 50.0% owned joint venture, $1.0 million from a 53.1% owned subsidiary and $0.1 million from a 99.9% owned subsidiary which the Company consolidates. As of December 31, 2022, non-controlling interests includes $1.0 million from a 50.0% owned joint venture, $1.1 million from a 53.1% owned subsidiary and $0.1 million from a 99.9% owned subsidiary which the Company consolidates.