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Earnings (Loss) Per Common Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Computations of basic and diluted earnings (loss) per common share
The following table sets forth the computations of basic and diluted income (loss) per common share for the three and nine months ended September 30, 2018 and 2017 (in thousands, except per share data):  
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,

 
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
 
Net income (loss) from continuing operations
 
$
2,626

 
$
1,077

 
$
(2,582
)
 
$
(1,096
)
Net loss from discontinued operations
 
$
(325
)
 
$
(344
)
 
$
(684
)
 
$
(1,029
)
 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding
 
23,558

 
22,498

 
23,142

 
22,225

        Effective of dilutive securities from stock-based compensation plans
 
649

 
263

 
—

 
—

        Weighted-average diluted common shares outstanding
 
24,207

 
22,761

 
23,142

 
22,225

 
 
 
 
 
 
 
 
 
Basic income (loss) per common share from continuing operations
 
$
0.11

 
$
0.05

 
$
(0.12
)
 
$
(0.05
)
Basic loss per common share from discontinued operations
 
(0.01
)
 
(0.02
)
 
(0.02
)
 
(0.05
)
Total basic income (loss) per common share
 
$
0.10

 
$
0.03

 
$
(0.14
)
 
$
(0.10
)
 
 
 
 
 
 
 
 
 
Diluted income (loss) per common share from continuing operations
 
$
0.11

 
$
0.05

 
$
(0.11
)
 
$
(0.05
)
Diluted loss per common share from discontinued operations
 
(0.01
)
 
(0.02
)
 
(0.03
)
 
(0.05
)
Total diluted income (loss) per common share
 
$
0.10

 
$
0.03

 
$
(0.14
)
 
$
(0.10
)