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Warrants - Summary of information about stock warrants (Details 1)
12 Months Ended
Dec. 07, 2009
Dec. 31, 2013
Warrant
Exercise Price $ 1.10
Dec. 31, 2013
Warrant
Exercise Price $ 1.00
Class of Warrant or Right [Line Items]      
Exercise price (in dollars per share) 1.00 1.10 1.00
Number Outstanding   1,342,500 2,000,004
Weighted Average Remaining Contractual Life   1 month 7 years
Number Exercisable   1,342,500 2,000,004