DERIVATIVE FINANCIAL INSTRUMENTS - Effect on the consolidated statements of operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	$ (5,817,825)	$ (276,209)
Eurodollar Future [Member] | Repurchase Agreement Funding Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	(2,709,000)	(82,000)
Eurodollar Future [Member] | Junior Subordinated Debt Funding Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	(390,000)	241,000
Treasury Note Future [Member] | Repurchase Agreement Funding Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	(522,000)	759,000
TBA Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	(2,197,000)	(1,194,000)
TBA Contracts [Member] | Repurchase Agreement Funding Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) gains on derivative instruments	$ (2,197,000)	$ (1,194,000)