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Net Income (Loss) Per Common Share | 3 Months Ended
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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.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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