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Earnings Per Share
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
Basic earnings per share, for both continuing and discontinued operations, is calculated by dividing net income (loss) for the period by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share, for both continuing and discontinued operations, is computed by dividing net income (loss) for the period by the weighted average number of shares of common stock outstanding during the period and including the dilutive effect of common stock that would be issued assuming conversion or exercise of outstanding warrants, stock options, share based compensation awards and other dilutive securities. No such items were included in the computation of diluted loss per share in the three months ended March 31, 2013 because we incurred a net loss in the period and the effect of inclusion would have been anti-dilutive.
The following is a reconciliation of weighted-average shares outstanding used in the calculation of basic and diluted earnings from continuing operations per share for the three months ended March 31, 2013 (in thousands, except per share data):
 
Three Months Ended
 
March 31, 2012
 
March 31, 2013
Income (loss) from continuing operations
$
160

 
$
(560
)
Basic weighted-average common shares outstanding
56,030

 
58,001

Assumed exercise of dilutive stock options and restricted stock
528

 
—

Diluted weighted-average common shares outstanding
56,558

 
58,001

Income (loss) from continuing operations:
 
 
 
Basic earnings per share
$
—

 
$
(0.01
)
Diluted earnings per share
$
—

 
$
(0.01
)

Outstanding equity awards not included in the calculation of diluted net income (loss) per share because their effect was anti-dilutive were as follows:
 
March 31, 2012
 
March 31, 2013
 
Number of
Potential
Shares
 
Range of
Exercise Prices
 
Number of
Potential
Shares
 
Range of
Exercise Prices
Stock options
9,312,258

 
$1.55 - $16.36

 
9,159,312

 
$0.47 - $16.36

Unvested stock awards
1,147,085

 
$
—

 
508,221

 
$
—

Warrants
1,602,489

 
$
2.40

 
1,602,489

 
$
2.40