INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES - Statement of operations (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Revenues
Rental revenues	$ 967	$ 577	$ 447	$ 1,024	$ 1,991	$ 3,225	$ 1,563	[1]	$ 4,631	[1]
Total revenues	2,425	833	493	1,326	3,751	27,265	1,826	[1]	4,631	[1]
Operating Expenses
Property operating expenses	897	1,888		3,795	4,692	5,583	9,120	[1]	7,140	[1]
Real estate taxes	271	79	79	158	429	724	254	[1]	510	[1]
General and administrative	1,440	1,387	1,243	2,630	4,070	5,133	5,217	[1]	5,677	[1]
Total operating expenses	5,162	4,516	4,392	8,908	14,070	37,880	18,976	[1]	18,345	[1]
Operating (loss) income	(2,737)	(3,683)	(3,899)	(7,582)	(10,319)	(10,615)	7,046	[1]	(4,193)	[1]
Interest expense, net	(2,367)	(1,772)	(875)	(2,647)	(5,014)	(7,922)	(1,540)	[1]	(113)	[1]
Interest expense - amortization of deferred finance costs	(269)	(683)	(261)	(944)	(1,213)	(1,521)	(261)	[1]	(39)	[1]
Net (loss) income attributable to common stockholders	$ (3,608)	(6,434)	(7,419)	(13,853)	(17,461)	(20,805)	4,333	[1]	(5,292)	[1]
Our equity in net loss from unconsolidated joint ventures		$ (264)	$ (372)	$ (636)	$ (636)	(555)	(1,571)	[1]	(819)	[1]
Unconsolidated Joint Ventures
Revenues
Rental revenues						12,679	12,747		3,314
Total revenues						12,679	12,747		3,314
Operating Expenses
Property operating expenses						4,055	3,595		956
Real estate taxes						100	94		45
General and administrative						10	10		10
Amortization						2,479	5,676		536
Depreciation						3,937	3,833		1,328
Total operating expenses						10,581	13,208		2,875
Operating (loss) income						2,098	(461)		439
Interest expense, net						(3,806)	(3,780)		(1,905)
Interest expense - amortization of deferred finance costs						(289)	(1,881)		(172)
Interest expense - change in fair market value of interest rate swap						(153)
Net (loss) income attributable to common stockholders						$ (2,150)	$ (6,122)		$ (1,638)

[1] Amounts are revised. See Note 3 for more information.