Quarterly report pursuant to Section 13 or 15(d)

Nonconsolidated variable interest entities - Information of Equity Investments (Details)

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Nonconsolidated variable interest entities - Information of Equity Investments (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 3,221,282   $ 3,221,282   $ 3,065,557
Income of equity method investees 264,005 $ 178,342 156,402 $ 492,130  
Bagatelle NY LA Investors, LLC (Bagatelle Investors)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 23,001   23,001   6,569
Bagatelle Little West 12th, LLC ( Bagatelle NY)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 2,782,929   2,782,929   2,552,687
One 29 Park, LLC (One 29 Park)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 415,352   $ 415,352   $ 506,301