STOCKHOLDERS' EQUITY - Summary of Company's Distribution Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders Equity [Line Items]
Gross Distributions													$ 20,341	$ 4,942	$ 295
Cash Distribution
Stockholders Equity [Line Items]
Declared per Common Share (in dollars per share)	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.13625	$ 0.1295	$ 0.1295	$ 0.545	$ 0.545	$ 0.5315
Paid in Cash	$ 2,058	$ 1,841	$ 1,558	$ 1,178	$ 747	$ 495	$ 305	$ 140	$ 45	$ 25	$ 23	$ 23	$ 6,635	$ 1,687	$ 116
Reinvested in Shares	3,242	2,866	2,319	1,744	1,102	681	399	197	44	11	10	10	10,171	2,379	75
Distribution Fees	1,105	992	818	620	406	256	147	67	12	0	0	0	3,535	876	12
Gross Distributions	$ 6,405	$ 5,699	$ 4,695	$ 3,542	$ 2,255	$ 1,432	$ 851	$ 404	$ 101	$ 36	$ 33	$ 33	$ 20,341	$ 4,942	$ 203