OTHER INTANGIBLE ASSETS AND LIABILITIES - Intangible Assets and Liabilities and Related Accumulated Amortization and Accretion (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Intangible lease assets:
Intangible lease assets, net	$ 6,313	$ 7,260
Intangible lease liabilities:
Acquired below-market leases, net of accumulated amortization of $1,786 and $2,239, respectively, both with an average useful life of 4 years	587	1,282
Acquired Below Market Leases
Intangible lease liabilities:
Acquired below-market leases, accumulated amortization	$ 1,786	$ 2,239
Acquired finite lived intangible lease liabilities average useful life	4 years	4 years
Acquired below-market leases, net of accumulated amortization of $1,786 and $2,239, respectively, both with an average useful life of 4 years	$ 587	$ 1,282
Acquired in-place Leases
Intangible lease assets:
Intangible lease assets, accumulated amortization	9,228	9,382
Intangible lease assets, net	$ 3,316	$ 4,271
Acquired finite lived intangible lease assets average useful life	8 years	8 years
Above Market Leases
Intangible lease assets:
Intangible lease assets, accumulated amortization	$ 15	$ 42
Intangible lease assets, net	$ 40	$ 32
Acquired finite lived intangible lease assets average useful life	6 years	5 years
Trade name and license
Intangible lease assets:
Intangible lease assets, net	$ 2,957	$ 2,957