Net Loss Per Common Share

9 Months Ended

Sep. 30, 2013

Net Loss Per Common Share

Net Loss Per Common Share

4. Net Loss Per Common Share

Basic and diluted net loss per common share is determined by dividing net loss applicable to common stockholders by the weighted average common shares outstanding during the period. For the periods where there is a net loss attributable to common shareholders, the outstanding shares of preferred stock, stock options, unvested restricted stock, and warrants have been excluded from the calculation of diluted loss per common shareholder because their effect would be anti-dilutive. Therefore, the weighted average shares used to calculate both basic and diluted loss per share would be the same. The following table sets forth the computation of basic and diluted net loss per share for the periods indicated:

	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Basic and diluted net loss per common share calculation:
Net loss	$	(16,132	)	$	(4,153	)	$	(30,757	)	$	(10,731	)
Accretion of preferred stock dividends	(2,292		)	(1,775		)	(5,891		)	(5,288		)
Net loss attributable to common shareholders	$	(18,424	)	$	(5,928	)	$	(36,648	)	$	(16,019	)
Weighted average common shares outstanding	1,795			1,455			1,579			1,447
Net loss per share of common stock - basic and diluted	$	(10.26	)	$	(4.07	)	$	(23.21	)	$	(11.07	)

The following potentially dilutive securities have been excluded from the computations of diluted weighted average shares outstanding for the periods presented, as they would be anti-dilutive:

	Three months ended September 30,		Nine months ended September 30,
	2013	2012	2013	2012
Redeemable convertible preferred stock	—	16,513	—	16,513
Stock options outstanding	2,620	1,301	2,620	1,301
Warrants	101	78	101	78
Total	2,721	17,892	2,721	17,892