OTHER INTANGIBLE ASSETS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible liabilities
Net	$ (2,872,000)	$ (1,070,000)
Future accretion of acquisition related intangible liabilities
Net	(2,872,000)	(1,070,000)
Acquired Below-Market Leases
Intangible liabilities
Gross balance	(6,618,000)	(2,902,000)
Accumulated amortization	3,746,000	1,832,000
Net	$ (2,872,000)	$ (1,070,000)
Average useful life	4 years	5 years
Amortization
Amortization expenses, above and below market leases	$ 2,190,000	$ 1,066,000	$ 2,510,000
Future accretion of acquisition related intangible liabilities
2019	(1,590,000)
2020	(701,000)
2021	(347,000)
2022	(234,000)
2023	0
Thereafter	0
Net	(2,872,000)	(1,070,000)
Acquired Above-Market Leases
Intangible assets
Gross balance	146,000	37,000
Accumulated amortization	(51,000)	0
Net	$ 95,000	$ 37,000
Average useful life	3 years	7 years
Amortization
Amortization expenses, above and below market leases	$ 51,000	$ 3,000	88,000
Future amortization of acquisition related intangible assets
2019	63,000
2020	9,000
2021	5,000
2022	5,000
2023	6,000
Thereafter	7,000
Net	95,000	37,000
Acquired In-Place Leases
Intangible assets
Gross balance	16,210,000	11,087,000
Accumulated amortization	(9,731,000)	(7,700,000)
Net	$ 6,479,000	$ 3,387,000
Average useful life	8 years	9 years
Amortization
Amortization expenses	$ 3,691,000	$ 808,000	1,347,000
Future amortization of acquisition related intangible assets
2019	2,136,000
2020	1,373,000
2021	923,000
2022	687,000
2023	375,000
Thereafter	985,000
Net	6,479,000	3,387,000
Trade Name And License
Intangible assets
Gross balance	2,957,000	2,957,000
Accumulated amortization	0	0
Net	2,957,000	2,957,000
Future amortization of acquisition related intangible assets
Net	2,957,000	2,957,000
Tax Abatement
Amortization
Amortization expenses	0	276,000	551,000
Acquired Below-Market Ground Lease
Amortization
Amortization expenses	0	93,000	140,000
Franchise Affiliation Fee
Amortization
Amortization expenses	$ 0	$ 0	$ 33,000