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Segment Information and Concentrations - Revenue by geographic areas (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Revenues: $ 3,291,639 $ 2,796,354 $ 11,992,245 $ 10,787,615
United States
       
Revenues: 2,492,640 1,971,957 8,296,712 6,450,535
Europe
       
Revenues: 656,571 494,343 2,140,903 2,884,395
Asia and rest of world
       
Revenues: $ 142,428 $ 330,054 $ 1,554,630 $ 1,452,685