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Net Loss Per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Net Loss Per Share | Net Loss Per Share Basic net loss per share is computed by dividing the net loss for the year by the weighted average number of common shares outstanding during the year. Diluted net loss per share is calculated in accordance with the treasury stock method for the outstanding stock options and restricted stock units and reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted to common stock. For the three months ended March 31, 2019, the dilutive impact of the outstanding Notes issued by the Company (discussed in Note 9) has been considered using the "if-converted" method. For the three months ended March 31, 2019 and 2018, basic and diluted net loss per share are the same, as the assumed exercise or settlement of stock options, restricted stock units and warrants and the potentially dilutive shares issuable upon conversion of the Notes are anti-dilutive. The following table summarizes potential shares of common stock that were excluded from the diluted net loss per share calculation because of their anti-dilutive effect for the three months ended March 31, 2019 and 2018:
Common Stock Equivalents | 2019 |  | 2018
Options to purchase common stock | 11,027,600 |  |  | 9,467,477 |
Warrants to purchase common stock | — |  |  | 284,091 |
Restricted stock units | 1,720,128 |  |  | 1,791,886 |
Convertible preferred stock | 8,456 |  |  | 8,456 |
Convertible notes | 14,585,653 |  |  | — |
Total | 27,341,837 |  |  | 11,551,910 |

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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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