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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 2,957,278   $ 2,957,278   $ 3,065,557
Equity in income of investee companies 152,914 $ (231,203) 107,603 $ (313,788)  
Bagatelle NY LA Investors, LLC (Bagatelle Investors)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments (15,535)   (15,535)   6,569
Bagatelle Little West 12th, LLC ( Bagatelle NY)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 2,521,370   2,521,370   2,552,687
One 29 Park, LLC (One 29 Park)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 451,443   $ 451,443   $ 506,301