Quarterly report pursuant to Section 13 or 15(d)

Property and equipment, net (Details)

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Property and equipment, net (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Less accumulated depreciation and amortization $ 16,629,416   $ 15,809,101
Property and equipment, net 37,302,061   36,815,239
Depreciation and amortization 865,870 $ 522,639  
Furniture, fixtures and equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 9,328,638   9,130,469
Written off property plant and equipment   670,000  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 36,627,346   36,147,135
Written off property plant and equipment   $ 1,600,000  
Furniture, fixtures, and equipment and leasehold improvements, less accumulated depreciation and amortization      
Property, Plant and Equipment [Line Items]      
Property and equipment, net 29,326,568   29,468,503
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 6,472,701   5,992,614
Restaurant supplies      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 1,502,792   $ 1,354,122