SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 22, 2020	Jan. 31, 2020	Mar. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Proceeds from sale of REO				$ 836	$ 8,692
Net gain (loss) on sale of investment real estate				$ 184	3,938
Series B Preferred Stock
Subsequent Event [Line Items]
Covenant, maximum excess of certain expenses over approved budget, percent				103.00%
Covenant, excess of certain expenses over approved budget, percent, actual				103.00%
Broadway Tower
Subsequent Event [Line Items]
Proceeds from sale of REO				$ 800	8,700
Net gain (loss) on sale of investment real estate				$ 200	$ 3,900
Subsequent Event | Broadway Tower
Subsequent Event [Line Items]
Proceeds from sale of REO	$ 19,500		$ 19,500
Net proceeds from sale of REO	8,000	$ 8,000	8,000
Principal payment	11,000
Net gain (loss) on sale of investment real estate	$ (1,500)		(1,500)
Original Borrower and Guarantor | Subsequent Event | Broadway Tower
Subsequent Event [Line Items]
Proceeds from legal settlements		$ 1,750
Pending Litigation | RNMA I | Subsequent Event
Subsequent Event [Line Items]
Payments for legal settlements			1,300
Settlement loss			$ 1,300