RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
General and administrative, related party	$ 575	$ 530
Director | Advisory services
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
Related party expense	1,331	1,268
Majestic Property Management Corp. | Real property management, real estate brokerage and construction supervision services
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
Related party expense	33	32
Gould Investors L.P. | Shared services agreement
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
General and administrative, related party	575	530
Affiliated entity | Management fee
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
Related party expense	68	128
Affiliated entity | Insurance reimbursement
ADVISOR'S COMPENSATION AND RELATED PARTY TRANSACTIONS
Related party expense	$ 40	$ 38