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, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 3,039,699   $ 3,039,699   $ 2,910,362
Equity in income of investee companies 231,203 $ 354,261 313,788 $ 523,231  
Bagatelle NY LA Investors, LLC (Bagatelle Investors)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 2,154   2,154   7,364
Bagatelle Little West 12th, LLC ( Bagatelle NY)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 2,492,474   2,492,474   2,357,927
Bagatelle La Cienega, LLC (Bagatelle LA)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments 0   0   0
One 29 Park, LLC (One 29 Park)          
Schedule of Equity Method Investments [Line Items]          
Equity method investments $ 545,071   $ 545,071   $ 545,071