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Net Loss per Share | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Net Loss per Share |
(1 5) | Net Loss per Share
The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except for share and per share amounts):
|  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (48,435 | ) |  | $ | (40,377 | )
Denominator: |  |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic and diluted |  |  | 23,882,685 |  |  |  | 6,724,641 |
Net loss per share attributable to common stockholders - basic and diluted |  | $ | (2.03 | ) |  | $ | (6.00 | )
The Company’s potentially dilutive shares, which include outstanding stock options and unvested restricted common stock, are considered to be common share equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive. The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of the diluted net loss per share attributable to common stockholders for the period indicated because including them would have had an anti-dilutive effect.
|  | As of December 31, |
|  | 2018 |  |  | 2017 |
Unvested restricted common stock awards |  |  | 118,679 |  |  |  | 375,479 |
Outstanding options to purchase common stock |  |  | 1,739,884 |  |  |  | 1,267,221 |

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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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