Net Loss per Share

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Net Loss per Share

Note 7. Net Loss Per Share

Net loss attributable to common stockholders per share is computed by dividing the net loss allocable to common stockholders by the weighted-average number of shares of common stock or common stock equivalents outstanding. Outstanding stock options, warrants and preferred stock have not been included in the calculation of diluted net loss attributable to common stockholders per share because to do so would be anti-dilutive. Accordingly, the numerator and the denominator used in computing both basic and diluted net loss per share for each period are the same. The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per share:

	For the 3-months ended March 31,
	2015			2014
Numerator:
Net loss	$	(4,088,134	)	$	(2,827,588	)
Accretion of stock issuance costs		(24,077	)		(22,481	)
Accretion of discount on Series E warrants		(87,470	)		(51,377	)
Series E and D, preferred stock dividends		(798,582	)		(740,637	)
Net loss attributable to common stockholders	$	(4,998,263	)	$	(3,642,083	)
Denominator:
Weighted-average common shares outstanding-basic and    diluted		333,408			96,349

The following outstanding options, warrants and preferred stock were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive:

	March 31,		December 31,
	2015		2014
Options to purchase common stock		593,663		595,577
Convertible preferred stock (as converted)		2,127,463		2,126,982
Convertible preferred stock warrants (as converted)		136,908		50,681
Common stock warrant		931		931