Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

Net loss per share was computed by dividing net loss by the weighted average number of common shares outstanding for the years ended December 31, 2013, 2012, and 2011:

	Year Ended December 31,
	2013			2012			2011
Net loss	$	(16,068	)	$	(35,774	)	$	(28,730	)
Shares used in computing basic and diluted net loss per share	62,607			59,811			56,592
Basic and diluted net loss per share	$	(0.26	)	$	(0.60	)	$	(0.51	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following outstanding Company securities, using the treasury stock method, were excluded from the above calculations of net loss per share because their impact would have been anti-dilutive due to the net losses during the years ended December 31, 2013, 2012, and 2011:

	Year Ended December 31,
	2013	2012	2011
Common stock options	2,374	2,698	3,127
Restricted stock awards	403	405	640
Restricted stock units	234	492	—
Total	3,011	3,595	3,767

As discussed in Note 6, in December 2013, the Company issued $86.3 million aggregate principal amount of 2.25% convertible senior notes due 2018 (the “Notes”) in an underwritten public offering. Upon any conversion the Notes may be settled, at the Company’s election, in cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock. For purposes of calculating the maximum dilutive impact, it is presumed that the Notes will be settled in common stock with the resulting potential common shares included in diluted earnings per share if the effect is more dilutive. The effect of the conversion of the Notes is excluded from the calculation of diluted loss per share because the net loss for the year ended December 31, 2013 causes such securities to be anti-dilutive. The potential dilutive effect of these securities is shown in the chart below:

	Year Ended December 31,
	2013	2012	2011
Conversion of the Notes	3,588	—	—

The effect of the contingently issuable common stock is excluded from the calculation of basic loss per share until all necessary conditions for issuance have been satisfied. Refer to Note 9 of the Notes to the Consolidated Financial Statements for further discussion.