Annual report pursuant to Section 13 and 15(d)

Statement of Changes in Stockholder's Equity (Parenthetical)

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Statement of Changes in Stockholder's Equity (Parenthetical) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]      
Partners' Capital Account, Public Sale of Units Net of Offering Costs     $ 1,651,578
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs $ 67,388 $ 211,676