FAIR VALUE - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	$ 217,840,953	$ 212,424,192
Orchid Island Capital, Inc. common stock, at fair value	8,892,211	9,713,030
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	217,841,000	212,424,000
Orchid Island Capital, Inc. common stock, at fair value	8,892,000	9,713,000
TBA Contracts	(59,000)	(938,000)
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Orchid Island Capital, Inc. common stock, at fair value	8,892,000	9,713,000
TBA Contracts	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	217,841,000	212,424,000
Orchid Island Capital, Inc. common stock, at fair value	0	0
TBA Contracts	(59,000)	(938,000)
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Orchid Island Capital, Inc. common stock, at fair value	0	0
TBA Contracts	$ 0	$ 0