INVESTMENT IN UNCONSOLIDATED JOINT VENTURE - Balance sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
MEMBERS' EQUITY
Our investment in unconsolidated joint venture	$ 10,673	$ 11,526
Corporate Joint Venture [Member]
ASSETS
Real estate, net	50,508	51,802
Cash and cash equivalents	344	201
Restricted cash	435	392
Tenant and other receivables, net	42	39
Prepaid expenses and other assets, net	66	43
Intangible assets, net	11,757	12,293
Total assets	63,152	64,770
LIABILITIES
Mortgage payable, net	41,207	41,135
Accounts payable and accrued expenses	598	583
Total liabilities	41,805	41,718
MEMBERS' EQUITY
Members' equity	27,169	27,236
Accumulated deficit	(5,822)	(4,184)
Total members' equity	21,347	23,052
Total liabilities and members' equity	63,152	64,770
Our investment in unconsolidated joint venture	$ 10,673	$ 11,526