Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Computation of Net Income (Loss) per Share

The following table presents computations of net income (loss) per share.

	For the three months ended September 30,						For the nine months ended September 30,
	2013			2012			2013			2012
Net income (loss) per share-Basic:
Numerator for basic net (loss) income per share	$	(12,937	)	$	11,433		$	(24,981	)	$	(1,663	)
Denominator for basic net (loss) income per share		27,158,394			3,957,231			26,543,099			3,887,530
Basic net (loss) income per common share	$	(0.48	)	$	2.89		$	(0.94	)	$	(0.43	)
Net income (loss) per share-Diluted:
Numerator for diluted net income (loss) per share	$	(12,937	)	$	11,433		$	(24,981	)	$	(1,663	)
Less: Fair value of stock warrants		—			(14,545	)		—			—
Less: Fair value of derivatives		—			(1,894	)		—			—
Net loss attributable to common share	$	(12,937	)	$	(5,006	)	$	(24,981	)	$	(1,663	)
Denominator for diluted net loss per share		27,158,394			3,957,231			26,543,099			3,887,530
Diluted net loss per common share	$	(0.48	)	$	(1.27	)	$	(0.94	)	$	(0.43	)

Securities Excluded from Calculation of Weighted-Average Shares Outstanding

The following potentially dilutive securities have been excluded from the calculations of diluted net loss per share as their effect would be anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Shares of convertible preferred stock		—		1,917,120		—		1,917,120
Shares underlying options outstanding		1,269,320		546,490		1,269,320		546,490
Shares underlying warrants outstanding		6,033,050		5,466,470		6,033,050		5,466,470