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Loss Per Share (Computation for Basic and Diluted Loss Per Share) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Numerator:        
Net loss $ (3,643,946) $ (2,718,126) $ (10,287,300) $ (4,839,585)
Numerator for basic and diluted earnings per share $ (3,643,946) $ (2,718,126) $ (10,287,300) $ (4,839,585)
Denominator:        
Denominator for basic and diluted earnings per share — weighted-average shares 38,732,896 33,137,368 38,728,454 32,911,836
Basic and diluted loss per share $ (0.09) $ (0.08) $ (0.27) $ (0.15)