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Net Loss per Share | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Net Loss per Share | 5. Net 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 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 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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