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
Mar. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]              
Due to Related Parties, Current   $ 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 $ 300,000 $ 300,000  
One 29 Park LLC [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity Method Investment, Ownership Percentage   0.00%     0.00%   10.00%
Due to Related Parties, Current   $ 100,000     $ 100,000   $ 100,000
Other than Temporary Impairment Losses, Investments     $ 0        
Gain (Loss) on Sale of Investments $ 200,000            
Noncontrolling Interest in Variable Interest Entity $ 600,000   $ 600,000        
One 29 Park LLC [Member] | Management Service [Member]              
Schedule of Equity Method Investments [Line Items]              
Revenue from Contract with Customer, Including Assessed Tax   100,000   100,000 200,000 200,000  
Bagatelle [Member]              
Schedule of Equity Method Investments [Line Items]              
Due to Related Parties, Current   100,000     100,000   $ 100,000
Bagatelle [Member] | Management Service [Member]              
Schedule of Equity Method Investments [Line Items]              
Revenue from Contract with Customer, Including Assessed Tax   $ 95,000   $ 48,000 $ 100,000 $ 100,000