Quarterly report pursuant to Section 13 or 15(d)

Nonconsolidated variable interest entities (Details Textual)

v3.10.0.1
Nonconsolidated variable interest entities (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]                
Due to Related Parties, Current   $ 0   $ 0   $ 0   $ 256,000
Bagatelle NY LA Investors, LLC (Bagatelle Investors) [Member]                
Schedule of Equity Method Investments [Line Items]                
Equity Method Investment, Ownership Percentage   31.24%   31.24%   31.24%    
Bagatelle Little West 12th, LLC (Bagatelle NY) [Member]                
Schedule of Equity Method Investments [Line Items]                
Equity Method Investment, Ownership Percentage   51.13%   51.13%   51.13%    
Rental Income, Nonoperating   $ 100,000 $ 100,000     $ 400,000 $ 400,000  
One 29 Park LLC [Member]                
Schedule of Equity Method Investments [Line Items]                
Equity Method Investment, Ownership Percentage   0.00%   0.00%   0.00%   10.00%
Due to Related Parties, Current   $ 200,000   $ 200,000   $ 200,000   $ 100,000
Gain (Loss) on Sale of Investments $ 200,000              
Noncontrolling Interest in Variable Interest Entity $ 600,000              
Revenue from Contract with Customer, Including Assessed Tax   100,000 100,000 $ 300,000 $ 300,000      
Bagatelle [Member]                
Schedule of Equity Method Investments [Line Items]                
Revenue from Contract with Customer, Including Assessed Tax   $ 42,000 $ 47,000     $ 200,000 $ 100,000