STOCKHOLDERS’ EQUITY (Share Redemption Program) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Stock repurchase program, required holding period	1 year
Stock redemption program, number of shares authorized to be repurchased, percentage of weighted average number of shares outstanding	5.00%
Stock redemption program, termination notice period	30 days
Stock redeemed during period (in shares)	65,000	5,300	0
Redemptions of common stock	$ 560,257	$ 48,015
Maximum
Class of Stock [Line Items]
Stock redemption program, number of shares authorized to be repurchased, percentage of weighted average number of shares outstanding	1.25%
Stock redemption program, redemption priority (in shares)	250
Common Class A
Class of Stock [Line Items]
Net asset value per share (in dollars per share)	$ 8	$ 8.60
Class T Common Stock
Class of Stock [Line Items]
Net asset value per share (in dollars per share)	$ 8	$ 8.60