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Net Loss Per Share | 6 Months Ended
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Jun. 30, 2017
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 shares of common stock outstanding during the year. Diluted net loss per share is calculated in accordance with the treasury stock method and reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted to common stock. Since the effect of the assumed exercise of common stock options and other convertible securities was anti-dilutive for all periods presented, basic and diluted loss per share are the same. 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 and six months ended June 30, 2017 and 2016:
Common Stock Equivalents | Three and Six Months Ended June 30, 2017 |  | Three and Six Months Ended June 30, 2016
Options to purchase common stock | 7,888,763 |  |  | 6,694,478 |
Warrants to purchase common stock | 284,091 |  |  | 284,091 |
Restricted stock units | 1,335,744 |  |  | 749,335 |
Convertible preferred stock | 8,456 |  |  | 8,456 |
Total | 9,517,054 |  |  | 7,736,360 |

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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 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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