XML 41 R18.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies - Schedule of Dividends Distributions Per Share and in Total (Detail) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dividends [Abstract]    
Distributions per Share $ 0.02 $ 0.18
Distributions paid $ 25,880 $ 268,645