Derivative liability (Details) (USD $)
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3 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended | |||||||||||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Oct. 16, 2013
The One Group [Member]
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Fair Value Measurements [Line Items] | |||||||||||||||
Fair value of derivative liability | $ 7,308,000 | $ 7,308,000 | $ 10,095,000 | $ 15,000,000 | |||||||||||
Trading market values (1) | $ 5.00 | [1] | $ 5.75 | [1] | |||||||||||
Term (years) (2) | 1 year 7 months 28 days | [2] | 2 years 29 days | [2] | |||||||||||
Expected volatility (1) | 36.40% | [1] | 41.40% | [1] | |||||||||||
Risk-free rate (2) | 0.35% | [2] | 0.38% | [2] | |||||||||||
Discount rate (3) | 1.21% | [3] | 1.24% | [3] | |||||||||||
Effective Exercise price (2) | $ 5.00 | [2] | $ 5.00 | [2] | $ 5.00 | [2] | |||||||||
Trigger price (2) | $ 6.25 | [2] | $ 6.25 | [2] | |||||||||||
Expected months until effective registration (3) | 0 months | [3] | 2 months | [3] | |||||||||||
Income on the adjustment of the derivative liability balance | 2,832,711 | 2,784,711 | |||||||||||||
Additional payments to TOG Members | 14,100,000 | ||||||||||||||
Shares required for additional payments to TOG Members | 5,750,000 | ||||||||||||||
Exercise price of warrants | $ 5.00 | ||||||||||||||
Aggregate contingent sign-on bonus | $ 900,000 | ||||||||||||||
Minimum price per share per agreement | $ 6.25 | ||||||||||||||
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