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Net Loss per Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Loss per Share | The following table sets forth the computation of basic and diluted loss per share for the three and nine months ended September 30 (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to Vicor Corporation |  | $ | (3,674 | ) |  | $ | (932 | ) |  | $ | (13,887 | ) |  | $ | (10,538 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic loss per share-weighted average shares (1) |  |  | 38,552 |  |  |  | 38,538 |  |  |  | 38,545 |  |  |  | 39,414 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options (2) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Denominator for diluted loss per share – adjusted weighted-average shares and assumed conversions |  |  | 38,552 |  |  |  | 38,538 |  |  |  | 38,545 |  |  |  | 39,414 |
Basic loss per share |  | $ | (0.10 | ) |  | $ | (0.02 | ) |  | $ | (0.36 | ) |  | $ | (0.27 | )
Diluted loss per share |  | $ | (0.10 | ) |  | $ | (0.02 | ) |  | $ | (0.36 | ) |  | $ | (0.27 | )
(1) | Denominator represents weighted average number of shares of Common Stock and Class B Common Stock outstanding.
(2) | Options to purchase 2,001,175 shares of Common Stock for the three and nine months ended September 30, 2014 were not included in the calculation of net loss per share as the effect would have been antidilutive. Options to purchase 1,142,576 and 1,098,473 shares of Common Stock for the three and nine months ended September 30, 2013, respectively, were not included in the calculation of net loss per share as the effect would have been antidilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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