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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]  
Schedule of Weighted Average Number of Shares [Table Text Block]
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 nine months ended September 30, 2012 and 2013 (in thousands, except per share data):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2012

2013

2012

2013
Income (loss) from continuing operations
$
(2,734
)
 
$
1,775

 
$
(5,519
)
 
$
3,304

Basic weighted-average common shares outstanding
57,327

 
58,736

 
56,768

 
58,376

Assumed exercise of dilutive stock options, warrants and restricted stock
—

 
1,326

 
—

 
503

Diluted weighted-average common shares outstanding
57,327

 
60,062

 
56,768

 
58,879

Income (loss) from continuing operations:
 
 
 
 
 
 
 
Basic earnings (loss) per share
$
(0.05
)
 
$
0.03

 
$
(0.10
)
 
$
0.06

Diluted earnings (loss) per share
$
(0.05
)
 
$
0.03

 
$
(0.10
)
 
$
0.06
Outstanding equity awards not included in calculation of diluted net loss per share
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

Nine Months Ended

September 30,

September 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
10,724,690


$0.47 - $16.36


4,457,057


$1.74 - $16.36


10,724,690


$0.47 - $16.36


9,167,615


$1.26 - $16.36

Unvested stock awards
884,391


$
—


112,977


—


884,391


$
—


279,415


$
—

Warrants
1,602,489


$
2.40


—


—


1,602,489


$
2.40


1,602,489


$
2.40