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
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]      
Equity method investments $ 2,887,547   $ 2,910,362
Equity in income of investee companies 82,585 $ 168,970  
Bagatelle Investors      
Schedule of Equity Method Investments [Line Items]      
Equity method investments (7,365)   7,364
Bagatelle NY      
Schedule of Equity Method Investments [Line Items]      
Equity method investments 2,349,841   2,357,927
Bagatelle LA      
Schedule of Equity Method Investments [Line Items]      
Equity method investments 0   0
One 29 Park      
Schedule of Equity Method Investments [Line Items]      
Equity method investments $ 545,071   $ 545,071