SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)			3 Months Ended	12 Months Ended
	Feb. 22, 2022 shares	May 05, 2021 shares	Mar. 31, 2022 USD ($) sub-servicer $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Feb. 14, 2019 USD ($)	Jan. 15, 2019 USD ($)	Dec. 15, 2015 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Non-accrual status | $			$ 0
Recognized impairment | $			0
Allowance for loan losses | $			$ 0
Number of sub-servers | sub-servicer			2
Principal amount | $			$ 47,750,000	$ 47,750,000
Deferred financing costs amortized | $			$ 1,524,508
Common stock, shares authorized (in shares)			450,000,000	450,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Common stock, shares issued (in shares)			52,225,152	24,947,883
Common stock, shares outstanding (in shares)			52,225,152	24,947,883
Stock repurchase program, authorized amount | $							$ 10,000,000
Preferred stock, shares authorized (in shares)			50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)			2,400,000	2,400,000
Preferred stock, shares outstanding (in shares)			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
Preferred stock, par value (in dollars per share) | $ / shares			$ 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
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		$ 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