RELATED PARTY TRANSACTIONS - Management Agreement (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Due to affiliates	$ 569		$ 569		$ 622
Bimini Advisors, LLC [Member]
Related Party Transaction [Line Items]
Termination Date			2/20/2021
Automatic Renewal Period Of Management Agreement			1 year
Management Fees And Allocated Expenses	$ 1,600	$ 1,700	$ 3,300	$ 3,300
Bimini Advisors, LLC [Member] | First $250 million of Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.50%
Bimini Advisors, LLC [Member] | Greater than $250 million but less than or equal to $500 million Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.25%
Bimini Advisors, LLC [Member] | Greater than $500 million of Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.00%