DISTRIBUTIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Class of Stock [Line Items]
Declared daily distribution rate, before adjustment for class-specific expenses (usd per share)	$ 0.00195203	$ 0.00198576	$ 0.00195924	$ 0.00193545
Distributions paid or payable in cash	$ 1,330	$ 1,369	$ 1,105	$ 1,000	$ 2,699	$ 2,105
Distributions reinvested	1,355	1,339	954	841	2,694	1,795
Distributions declared	2,685	2,708	2,059	1,841	5,393	3,900
Class A Common Stock
Class of Stock [Line Items]
Distributions declared	611	643	620	588	1,254	1,208
Class I Common Stock
Class of Stock [Line Items]
Distributions declared	1,875	1,866	1,314	1,147	3,741	2,461
Class T Common Stock
Class of Stock [Line Items]
Distributions declared	164	163	123	106	327	229
Class D Common Stock
Class of Stock [Line Items]
Distributions declared	$ 35	36	2	$ 0	$ 71	$ 2
Common Stock
Class of Stock [Line Items]
Distributions reinvested		$ 1	$ 1
Stock issued during period, dividend reinvestment plan (in shares)	96,204	92,879	66,579	58,984
Common Stock | Class A Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	24,380	25,107	23,894	22,405	49,487	46,299
Common Stock | Class I Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	67,373	63,595	39,949	34,329	130,968	74,278
Common Stock | Class T Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	4,451	4,177	2,736	2,250	8,628	4,986
Common Stock | Class D Common Stock
Class of Stock [Line Items]
Stock issued during period, dividend reinvestment plan (in shares)	0	0	0	0	0	0