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Computation of Net Loss Per Share | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Computation of Net Loss per Share | Note 17 Computation of Net Loss per Share The Company computes basic loss per share using net loss attributable to 3D Systems Corporation and the weighted average number of common shares outstanding during the applicable period. Diluted loss per share incorporates the additional shares issuable upon assumed exercise of stock options and the release of restricted stock and RSUs, except in such case when their inclusion would be anti-dilutive. ໿
(in thousands, except per share amounts) |  | 2018 |  | 2017 |  | 2016
Numerator for basic and diluted net loss per share: |  |  |  |  |  |
Net loss attributable to 3D Systems Corporation |  | $ | (45,505 | ) |  | $ | (66,191 | ) |  | $ | (38,419 | )
﻿ |  |  |  |  |  |
Denominator for basic and diluted net loss per share: |  |  |  |  |  |
Weighted average shares |  | 112,327 |  |  | 111,554 |  |  | 111,189 |
﻿ |  |  |  |  |  |
Net loss per share, basic and diluted |  | $ | (0.41 | ) |  | $ | (0.59 | ) |  | $ | (0.35 | )
For the years ended December 31, 2018, 2017 and 2016, the effect of dilutive securities, including non-vested stock options, restricted stock awards and RSUs, was excluded from the denominator for the calculation of diluted net loss per share because the Company recognized a net loss for each period and their inclusion would be anti-dilutive. Dilutive securities excluded were 5,015, 5,341 and 5,284 shares for the years ended December 31, 2018, 2017 and 2016, respectively.

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