Quarterly report pursuant to Section 13 or 15(d)

Derivative liability (Details)

Derivative liability (Details) - The One Group - USD ($)
12 Months Ended
Oct. 16, 2013
Dec. 31, 2015
Fair Value Measurements [Line Items]    
Additional payments to TOG Members $ 14,100,000  
Shares required for additional payments to TOG Members (in shares) 5,750,000  
Exercise price of warrants (in dollars per share) $ 5.00  
Aggregate contingent sign-on bonus $ 900,000  
Minimum price per share per agreement (in dollars per share) $ 6.25  
Threshold number of days above minimum stock price during measurement period 20 days  
Number of days in measurement period 30 days  
Write off of Expired Public Warrants   $ 100,000