Aggregate dividends paid during the period for each share of common stock outstanding.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended								12 Months Ended
	Mar. 07, 2019	Dec. 06, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Revenues			$ 15,462	$ 18,747	$ 19,336	$ 15,196	$ 15,991	$ 19,993	$ 19,463	$ 14,835	$ 68,741	$ 70,282	$ 51,968
Net loss attributable to common stockholders											(7,499)	(23,508)	(3,272)
Cash distributions declared per common share (in dollars per share)	$ 0.00799167	$ 0.01598333
Common Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders			$ (488)	$ (1,519)	$ (1,537)	$ (914)	$ (9,183)	$ (2,914)	$ (22)	$ (1,573)	$ (4,458)	$ (13,729)	$ (1,480)
Net (loss) income per common share, basic and diluted (in dollars per share)			$ (0.03)	$ (0.08)	$ (0.09)	$ (0.05)	$ (0.51)	$ (0.16)	$ 0	$ (0.09)	$ (0.25)	$ (0.77)	$ (0.09)
Cash distributions declared per common share (in dollars per share)			$ 0.024	$ 0.024	$ 0.024	$ 0.040	$ 0.048	$ 0.048	$ 0.048	$ 0.047
Common Class T
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders			$ (334)	$ (1,038)	$ (1,048)	$ (621)	$ (6,191)	$ (2,049)	$ (282)	$ (1,294)	$ (3,041)	$ (9,779)	$ (1,792)
Net (loss) income per common share, basic and diluted (in dollars per share)			$ (0.03)	$ (0.08)	$ (0.09)	$ (0.05)	$ (0.51)	$ (0.17)	$ (0.02)	$ (0.11)	$ (0.25)	$ (0.82)	$ (0.18)
Cash distributions declared per common share (in dollars per share)			$ 0.024	$ 0.024	$ 0.024	$ 0.040	0.048	0.041	0.025	0.024
Stock dividends declared per common share (in dollars per share)							$ 0.003	$ 0.005	$ 0.005	$ 0.005