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Warrant Liability (Details) - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Stock Price $ 12.63 $ 10.15
Dividend Yield $ 0.125 $ 0
Risk-free rate 0.46% 0.67%
Expected Term 1 year 8 months 19 days 1 year 11 months 19 days
Expected Volatility 32.69% 33.62%