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Net Income (Loss) Per Common Share
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Net Income (Loss) Per Common Share
Net Loss Per Common Share
The following table sets forth the computation of basic and diluted net loss per common share for the periods indicated (in thousands, except per share data):
 
 
Three Months Ended
 
 
March 31,
2018
 
April 1,
2017
Numerator:
 
 
 
 
Net loss
 
$
(11,736
)
 
$
(33,325
)
Denominator:
 
 
 
 
Weighted-average common shares outstanding used to compute basic net loss per share
 
51,611

 
49,525

Basic and diluted net loss per common share
 
$
(0.23
)
 
$
(0.67
)
Potentially dilutive shares, weighted average

6,870

 
6,145


Potentially dilutive shares have been excluded from the computation of diluted net loss per common share when their effect is antidilutive. These antidilutive shares were primarily from stock options, restricted stock units and performance restricted stock units. For each of the periods presented where the Company reported a net loss, the effect of all potentially dilutive securities would be antidilutive, and as a result diluted net loss per common share is the same as basic net loss per common share.