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Earnings Per Share
 6 Months Ended
Jun. 30, 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 and six months ended June 30, 2012 because we incurred net losses in the periods 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 and six months ended June 30, 2012 and 2013 (in thousands, except per share data):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2012

2013

2012

2013
Income (loss) from continuing operations
$
(2,945
)
 
$
2,089

 
$
(2,785
)
 
$
1,529

Basic weighted-average common shares outstanding
56,934

 
58,384

 
56,484

 
58,194

Assumed exercise of dilutive stock options and restricted stock
—

 
413

 
—

 
422

Diluted weighted-average common shares outstanding
56,934

 
58,797

 
56,484

 
58,616

Income (loss) from continuing operations:
 
 
 
 
 
 
 
Basic earnings (loss) per share
$
(0.05
)
 
$
0.04

 
$
(0.05
)
 
$
0.03

Diluted earnings (loss) per share
$
(0.05
)
 
$
0.04

 
$
(0.05
)
 
$
0.03


Outstanding equity awards not included in the calculation of diluted net income (loss) per share because their effect was anti-dilutive were as follows:
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2012
 
2013
 
2012
 
2013
 
Number of
Potential
Shares
 
Range of
Exercise Prices
 
Number of
Potential
Shares
 
Range of
Exercise Prices
 
Number of
Potential
Shares
 
Range of
Exercise Prices
 
Number of
Potential
Shares
 
Range of
Exercise Prices
Stock options
9,298,263

 
$0.47 - $16.36

 
7,299,887

 
$1.26 - $16.36

 
9,298,263

 
$0.47 - $16.36

 
8,725,951

 
$1.06 - $16.36

Unvested stock awards
1,132,568

 
$
—

 
5,550

 
—

 
1,132,568

 
$
—

 
11,753

 
$
—

Warrants
1,602,489

 
$
2.40

 
1,602,489

 
2.40

 
1,602,489

 
$
2.40

 
1,602,489

 
$
2.40


Shares issued
During the six months ended June 30, 2013, there were 31,000 shares issued from exercise of stock options, 30,000 restricted stock awards granted, and 458,000 shares purchased through our Employee Stock Purchase Plan. Additionally, during the six months ended June 30, 2013, there were 147,000 shares repurchased for tax purposes and 23,000 restricted stock awards canceled. During the year ended December 31, 2012, there were 27,000 shares issued from exercise of stock options, 844,000 restricted stock awards granted, and 675,000 shares purchased through our Employee Stock Purchase Plan. Additionally, during the year ended December 31, 2012, there were 485,000 shares repurchased for tax purposes and 495,000 restricted stock awards canceled.