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NET INCOME (LOSS) PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of calculation of basic and diluted earnings per common share
Basic and diluted earnings per common share are calculated as follows:
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in thousands, except for per share amounts)
 
2019
 
2018
 
2019
 
2018
Basic net income (loss) per share
 
 
 
 
 
 
 
 
Net (loss) income
 
$
(13,605
)
 
$
(21,048
)
 
$
(27,906
)
 
$
12,776

Denominator
 
64,480

 
63,719

 
64,405

 
63,611

Basic net (loss) income per share
 
$
(0.21
)
 
$
(0.33
)
 
$
(0.43
)
 
$
0.20

 
 
 
 
 
 
 
 
 
Diluted net income (loss) per share
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
Net (loss) income
 
$
(13,605
)
 
$
(21,048
)
 
$
(27,906
)
 
$
12,776

Denominator:
 
 
 
 
 
 
 
 
Denominator for basic net income (loss) per share
 
64,480

 
63,719

 
64,405

 
63,611

Add effect of diluted securities:
 
 
 
 
 
 
 
 
Stock options and equivalents and convertible debt
 
—

 
—

 
—

 
496

Denominator for diluted net income (loss) per share
 
64,480

 
63,719

 
64,405

 
64,107

Diluted net (loss) income per share
 
$
(0.21
)
 
$
(0.33
)
 
$
(0.43
)
 
$
0.20
Schedule of anti-dilutive securities excluded from computation of diluted net (loss) income per share
The following table sets forth outstanding potentially dilutive common shares that are not included in the computation of diluted net income (loss) per share because to do so would be anti-dilutive:
 
 
 
June 30,
 
June 30,
(in thousands)
 
2019
 
2018
Convertible debt
 
17,931

 
17,931

Stock options and equivalents
 
6,568

 
3,902

Total potentially dilutive common shares
 
24,499

 
21,833