Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Details Textual)

v3.10.0.1
Related Party Agreements (Details Textual) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Feb. 17, 2015
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Service Agreement Expenses   $ 0.1 $ 0.1 $ 0.4 $ 0.4
Asset Management Income [Member]          
Annual Consulting Fee $ 0.5        
Increase In Annual Consulting Fee 1.0        
Excess In Net Assets Value $ 100.0