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Net Loss Per Share
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
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, 2014, 2013, and 2012:

Year Ended December 31,

2014

2013

2012
Net loss
$
(32,418
)

$
(16,068
)

$
(35,774
)
Shares used in computing basic and diluted net loss per share
65,225


62,607


59,811

Basic and diluted net loss per share
$
(0.50
)

$
(0.26
)

$
(0.60
)


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, 2014, 2013, and 2012:

 Year Ended December 31,

2014

2013

2012
Common stock options
1,822

2,374

2,698
Restricted stock awards
321

403

405
Restricted stock units
182

234

492
  Total
2,325

3,011

3,595


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, 2014 causes such securities to be anti-dilutive. The potential dilutive effect of these securities is shown in the chart below:

Year Ended December 31,

2014

2013

2012
Conversion of the Notes
3,588

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.