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Selected Quarterly Financial Data (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]  
Schedule of selected quarterly financial data
 
Quarter-ended
 
December 31,
2014
 
September 30,
2014
 
June 30,
2014
 
March 31,
2014
Revenues
$
2,866,371

 
$
4,332,104

 
$
4,439,820

 
$
5,332,539

Cost of net revenues
303,601

 
333,828

 
338,519

 
312,828

Loss from operations
(4,366,992
)
 
(2,077,621
)
 
(3,754,279
)
 
(3,246,930
)
Net loss
(3,685,704
)
 
(2,105,859
)
 
(3,795,530
)
 
(3,293,505
)
Net loss per common share—basic and diluted
$
(0.07
)
 
$
(0.05
)
 
$
(0.09
)
 
$
(0.09
)

 
Quarter-ended
 
December 31,
2013
 
September 30,
2013
 
June 30,
2013
 
March 31,
2013
Revenues
$
5,613,559

 
$
6,251,325

 
$
6,742,242

 
$
5,793,726

Cost of net revenues
313,310

 
471,200

 
579,466

 
2,332,960

Loss from operations
(3,611,657
)
 
(2,895,031
)
 
(3,432,071
)
 
(10,157,219
)
Net loss
(3,676,389
)
 
(2,943,823
)
 
(3,490,297
)
 
(10,213,755
)
Net loss per common share—basic and diluted
$
(0.11
)
 
$
(0.09
)
 
$
(0.12
)
 
$
(0.39
)