CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Distributions and Net Loss	Total Stockholders' Equity	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2018		1	17,712
Beginning balance at Dec. 31, 2018	$ 248,481	$ 0	$ 18	$ 165,084	$ (95,162)	$ 69,940	$ 178,541
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares (in shares)			6
Issuance of common shares	76			76		76
Purchase of non-controlling interest (in shares)			700
Purchase of non-controlling interest	(68)			8,790		8,790	(8,858)
Dividends and distributions (cash)	(14,105)				(9,590)	(9,590)	(4,515)
Net income	(904)				381	381	(1,285)
Ending balance (in shares) at Sep. 30, 2019		1	18,418
Ending balance at Sep. 30, 2019	233,480	$ 0	$ 18	173,950	(104,371)	69,597	163,883
Beginning balance (in shares) at Jun. 30, 2019		1	18,418
Beginning balance at Jun. 30, 2019	237,270	$ 0	$ 18	173,950	(101,436)	72,532	164,738
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and distributions (cash)	(3,457)				(3,224)	(3,224)	(233)
Net income	(333)				289	289	(622)
Ending balance (in shares) at Sep. 30, 2019		1	18,418
Ending balance at Sep. 30, 2019	233,480	$ 0	$ 18	173,950	(104,371)	69,597	163,883
Beginning balance (in shares) at Dec. 31, 2019		1	18,418
Beginning balance at Dec. 31, 2019	225,006	$ 0	$ 18	174,019	(109,406)	64,631	160,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
HIREIT and XIX merger (in shares)			16,889
HIREIT and XIX merger	(9,251)		$ 17	136,799	1,264	138,080	(147,331)
Dividends and distributions (cash)	(17,120)				(12,605)	(12,605)	(4,515)
Net income	2,417				328	328	2,089
Ending balance (in shares) at Sep. 30, 2020		1	35,307
Ending balance at Sep. 30, 2020	201,052	$ 0	$ 35	310,818	(120,419)	190,434	10,618
Beginning balance (in shares) at Jun. 30, 2020		1	18,418
Beginning balance at Jun. 30, 2020	218,870	$ 0	$ 18	174,019	(113,373)	60,664	158,206
Increase (Decrease) in Stockholders' Equity [Roll Forward]
HIREIT and XIX merger (in shares)			16,889
HIREIT and XIX merger	(9,251)		$ 17	136,799	1,264	138,080	(147,331)
Dividends and distributions (cash)	(6,394)				(6,162)	(6,162)	(232)
Net income	(2,173)				(2,148)	(2,148)	(25)
Ending balance (in shares) at Sep. 30, 2020		1	35,307
Ending balance at Sep. 30, 2020	$ 201,052	$ 0	$ 35	$ 310,818	$ (120,419)	$ 190,434	$ 10,618