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Net Income (Loss) Per Share (Tables)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Basic and diluted net income per share
The following table sets forth the calculation of basic and diluted net income (loss) per share (in thousands, except per share amounts):
 
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Numerator:
 
 
 
 
 
 
 
Income (loss) from continuing operations

$
(576
)
 
$
1,378

 
$
917

 
$
5,001

Income from discontinued operations, net of income taxes
—

 
241

 
1,938

 
687

Net income (loss)
$
(576
)
 
$
1,619

 
$
2,855

 
$
5,688

Denominator:

 
 
 
 
 
 
 
Weighted average common shares—basic
12,628

 
13,839

 
13,023

 
14,109

Effect of dilutive securities: stock options
—

 
28

 
17

 
10

Weighted average common shares—diluted
12,628

 
13,867

 
13,040

 
14,119

Income (loss) per share—basic:
 
 
 
 
 
 
 
Continuing operations
$
(0.05
)
 
$
0.10

 
$
0.07

 
$
0.35

Discontinued operations
—

 
0.02

 
0.15

 
0.05

Net income (loss) per share—basic
$
(0.05
)
 
$
0.12

 
$
0.22

 
$
0.40

Income (loss) per share—diluted:
 
 
 
 
 
 
 
Continuing operations
$
(0.05
)
 
$
0.10

 
$
0.07

 
$
0.35

Discontinued operations
—

 
0.02

 
0.15

 
0.05

Net income (loss) per share—diluted
$
(0.05
)
 
$
0.12

 
$
0.22

 
$
0.40