INVESTMENT IN UNCONSOLIDATED JOINT VENTURE - Statement of operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Total revenues											$ 3,372
Operating Expenses
Property operating expenses											944
Real estate taxes											47
General and administrative											26
Amortization											1,533
Depreciation											1,310
Total operating expenses											3,860
Operating income (loss)											(488)
Interest expense, net											(1,452)
Interest expense - amortization of deferred finance costs											(173)
Net loss											(2,113)
Our equity in net loss from unconsolidated joint venture	$ (194)	$ (218)	$ (186)	$ (221)	$ (236)	$ (236)	$ (139)	$ (117)	$ (819)	$ (728)	$ (1,057)
Corporate Joint Venture [Member]
Revenues
Total revenues									3,314	3,447
Operating Expenses
Property operating expenses									956	1,033
Real estate taxes									45	45
General and administrative									10	7
Amortization									536	536
Depreciation									1,328	1,318
Total operating expenses									2,875	2,939
Operating income (loss)									439	508
Interest expense, net									(1,905)	(1,791)
Interest expense - amortization of deferred finance costs									(172)	(172)
Net loss									(1,638)	(1,455)
Our equity in net loss from unconsolidated joint venture									$ (819)	$ (728)