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Net Loss Per Share Attributable to Common Stockholders | 12 Months Ended
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Dec. 31, 2014
Earnings Per Share [Abstract] |
Net Loss Per Share Attributable to Common Stockholders |
3. | NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS
The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company (in thousands, except share data and per share data):
|  | Years Ended December 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Net loss |  | $ | (23,342 | ) |  | $ | (17,143 | ) |  | $ | (22,101 | )
Accretion of preferred stock issuance costs to redemption value |  |  | — |  |  |  | — |  |  |  | (73 | )
Net loss attributable to common stockholders — basic and diluted |  | $ | (23,342 | ) |  | $ | (17,143 | ) |  | $ | (22,174 | )
Weighted-average number of common shares — basic and diluted |  |  | 14,548,516 |  |  |  | 684,330 |  |  |  | 609,344 |
Net loss per share attributable to common stockholders — basic and diluted |  | $ | (1.60 | ) |  | $ | (25.05 | ) |  | $ | (36.39 | )
The Company has reported a net loss for all periods presented, therefore diluted net loss per common share is the same as basic net loss per common share. The following potentially dilutive securities outstanding have been excluded from the computation of diluted weighted-average shares outstanding, because such securities had an antidilutive impact due to the losses reported (in common stock equivalent shares):
|  | As of December 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Options to purchase common stock |  |  | 2,126,176 |  |  |  | 1,062,694 |  |  |  | 1,046,178 |
Warrants to purchase redeemable convertible preferred stock |  |  | — |  |  |  | 128,663 |  |  |  | 128,663 |
Warrants to purchase common stock |  |  | 128,663 |  |  |  | — |  |  |  | — |
Redeemable convertible preferred stock |  |  | — |  |  |  | 6,826,004 |  |  |  | 6,992,694 |
Convertible notes payable |  |  | — |  |  |  | 754,785 |  |  |  | — |

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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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