Annual report pursuant to Section 13 and 15(d)

Members' Equity (Details Textual)

v3.8.0.1
Members' Equity (Details Textual) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Members' Equity $ 0 $ 28,485,615 $ 24,229,517