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Stock Purchase Warrants (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Warrants, Beginning Balance 1,632,501 1,632,501
Number of Warrants, Granted 0 0
Number of Warrants, Exercised (232,619) 0
Number of Warrants, Forfeited (454,896) 0
Number of Warrants, Ending Balance 944,986 1,632,501
Weighted Average Exercise Price, Beginning Balance $ 1.99 $ 1.99
Weighted Average Exercise Price, Granted $ 0 $ 0
Weighted Average Exercise Price, Exercised $ 1.47 $ 0
Weighted Average Exercise Price, Forfeited $ 1.88 $ 0
Weighted Average Exercise Price, Ending Balance $ 2.16 $ 1.99