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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted (in thousands, except per share data): 
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2018
 
2017
 
2018
 
2017
Net income
$
219

 
$
136

 
$
36,148

 
$
18,939

Weighted-average number of common shares outstanding (for basic calculation)
20,474

 
19,984

 
20,362

 
19,433

Dilutive securities
1,159

 
1,122

 
1,226

 
1,170

Weighted-average common and common equivalent shares outstanding (for diluted calculation)
21,633

 
21,106

 
21,588


20,603

EPS — basic
$
0.01

 
$
0.01

 
$
1.78

 
$
0.97

EPS — diluted
$
0.01

 
$
0.01

 
$
1.67

 
$
0.92