SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)			3 Months Ended			9 Months Ended		12 Months Ended
	Feb. 22, 2022 shares	May 05, 2021 shares	Sep. 30, 2022 USD ($) sub-servicer loan $ / shares shares	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) sub-servicer loan $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Feb. 14, 2019 USD ($)	Jan. 15, 2019 USD ($)	Dec. 15, 2015 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Number of non accrual loans | loan			1			1
Reserve for impaired loan | $			$ 1,500,000			$ 1,900,000
Allowance for loan losses | $			1,872,937		$ 0	1,872,937	$ 0	$ 0	$ 351,914	$ 0	$ 0
Provision for loan losses | $			$ 1,521,023		$ 0	$ 1,872,937	$ 0
Number of sub-servers | sub-servicer			2			2
Principal amount | $			$ 47,750,000			$ 47,750,000		$ 47,750,000
Common stock, shares authorized (in shares)			450,000,000			450,000,000		450,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01			$ 0.01		$ 0.01
Common stock, shares issued (in shares)			52,231,152			52,231,152		24,947,883
Common stock, shares outstanding (in shares)			52,231,152			52,231,152		24,947,883
Stock repurchase program, authorized amount | $														$ 10,000,000
Preferred stock, shares authorized (in shares)			50,000,000			50,000,000		50,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01			$ 0.01		$ 0.01
Preferred stock, shares issued (in shares)			2,400,000			2,400,000		2,400,000
Preferred stock, shares outstanding (in shares)			2,400,000			2,400,000		2,400,000
Preferred stock, dividend rate, percentage						7.875%		7.875%
Common Stock
Debt and Equity Securities, FV-NI [Line Items]
Issuance of common stock (in shares)	27,277,269
Series A Cumulative Redeemable Preferred Stock
Debt and Equity Securities, FV-NI [Line Items]
Preferred stock, shares authorized (in shares)			50,000,000			50,000,000		50,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01			$ 0.01		$ 0.01
Preferred stock, shares issued (in shares)		2,400,000	2,400,000			2,400,000		2,400,000
Preferred stock, shares outstanding (in shares)			2,400,000			2,400,000		2,400,000
Preferred stock, dividend rate, percentage		7.875%
Delayed Draw Facility | Credit Agreement
Debt and Equity Securities, FV-NI [Line Items]
Principal amount | $			$ 47,750,000			$ 47,750,000						$ 40,250,000	$ 40,250,000
Collateralized Loan Obligations
Debt and Equity Securities, FV-NI [Line Items]
Maximum exposure to loss from consolidated trusts | $				$ 166,250,000		$ 166,250,000