Net Loss per Share

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Net Loss per Share

12. Net Loss per Share

The following table presents the calculation of basic and diluted net loss per share applicable to common stockholders:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2014			2013			2014			2013
Numerator:
Net loss	$	(9,348,391	)	$	(3,767,890	)	$	(26,663,829	)	$	(7,219,236	)
Accretion on preferred stock		—			(2,748,232	)		(86,899,555	)		(52,861,367	)
Net loss applicable to common stockholders	$	(9,348,391	)	$	(6,516,122	)	$	(113,563,384	)	$	(60,080,603	)
Denominator:
Weighted-average number of common shares – basic    and diluted		19,691,167			546,714			13,920,651			509,425
Net loss per share applicable to common    stockholders – basic and diluted	$	(0.47	)	$	(11.92	)	$	(8.16	)	$	(117.94	)

The amounts in the table below were excluded from the calculation of diluted net loss per share, prior to the use of the treasury stock method, due to their anti-dilutive effect:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Preferred stock		—		11,882,768		—		11,882,768
Outstanding stock options		1,596,538		1,229,594		1,596,538		1,229,594
Unvested restricted stock		563,810		110,521		563,810		110,521
Total		2,160,348		13,222,883		2,160,348		13,222,883