Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings per Share

Schedule of common stock equivalents excluded in the calculation of diluted income per share

	Three Months ended September 30,		Nine Months ended September 30,
	2015	2014	2015	2014
	(unaudited)		(unaudited)
Shares underlying Convertible Senior Secured Notes	—	—	—	—
Warrants to purchase common stock	40,850	—	38,424	—
Stock options, stock appreciation rights, non-vested stock options and ESPP awards	39,289	—	13,240	—

Schedule of computation of basic and diluted net income per share

The following table sets forth the computation of basic and diluted net income per share for the three and nine months ended September 30, 2015 and 2014, in thousands, except share and per share amounts:

	Three Months ended September 30,						Nine Months ended September 30,
	2015			2014			2015			2014
	(unaudited)						(unaudited)
Numerator, in thousands:
Net income used for calculation of basic EPS	$	4,222		$	27,858		$	7,145		$	15,516
Interest expense on convertible debt	292			1,289			1,004			3,774
Changes in fair value of derivative liabilities	(174		)	(760		)	(462		)	(2,115		)
Loss on extinguishment of outstanding debt, as if converted	32			(8,496		)	(94		)	(10,497		)
Total adjustments	150			(7,967		)	448			(8,838		)
Net income used for calculation of diluted EPS	$	4,372		$	19,891		$	7,593		$	6,678
Denominator:
Weighted average shares outstanding, basic	48,515,071			42,900,269			47,011,243			42,035,025
Effect of dilutive potential common shares:
Shares underlying Convertible Senior Secured Notes	1,961,410			6,751,484			3,703,320			7,308,192
Shares issuable to settle interest make-whole derivatives	98,879			825,057			—			687,148
Warrants to purchase common stock	—			20,857			—			20,905
Stock options, stock appreciation rights, non-vested stock options and ESPP awards	1,015,437			327,966			344,903			326,916
Total potential dilutive common shares	3,075,726			7,925,364			4,048,223			8,343,161
Weighted average shares outstanding, diluted	51,590,797			50,825,633			51,059,466			50,378,186
Net income per share, basic	$	0.09		$	0.65		$	0.15		$	0.37
Net income per share, diluted	$	0.08		$	0.39		$	0.15		$	0.13