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Earnings (Loss) Per Share (Tables)
 6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings Per Share
Basic and diluted EPS (in thousands, except per share amounts):
 
 
Quarter Ended
June 30,
 
Six Months Ended
June 30,
 
2017
 
2016
 
2017
 
2016
Net income (loss)
$
(3,386
)
 
$
(8,347
)
 
$
(12,810
)
 
$
(23,518
)
Weighted average common shares outstanding used to compute basic EPS
37,103

 
36,755

 
37,067

 
36,637

Dilutive effect of stock based awards
—

 
—

 
—

 
—

Weighted average common shares outstanding used to compute diluted EPS
37,103

 
36,755


37,067


36,637

 
 
 
 
 
 
 
 
Basic EPS
$
(0.09
)
 
$
(0.23
)
 
$
(0.35
)
 
$
(0.64
)
Diluted EPS
$
(0.09
)
 
$
(0.23
)
 
$
(0.35
)
 
$
(0.64
)