Net Loss Per Share	9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share	10. Net Loss Per Share Basic net loss per share allocable to common stockholders is calculated by dividing the net loss allocable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net loss per share allocable to common stockholders is computed by dividing the net loss allocable to common stockholders by the weighted-average number of common shares outstanding during the period and giving effect to all potentially dilutive common shares using the treasury-stock method. For purposes of this calculation, outstanding options, stock awards, warrants and Series B Convertible Preferred Stock are considered to be potentially dilutive common shares and are only included in the calculation of diluted net loss per share allocable to common stockholders when their effect is dilutive. As of September 30, 2019, stock options and stock awards, Series B Convertible Preferred Stock (on an as converted to common stock basis) and warrants (as exercisable into common stock), totaling approximately 10,065,000, 4,840,000 and 5,841,250 shares of common stock, respectively were excluded from the calculation of diluted net loss per share for the three and nine months ended September 30, 2019, because the effect of their inclusion would have been anti-dilutive. As of September 30, 2018, stock options and stock awards, totaling approximately 12,892,000 shares of common stock were excluded from the calculation of diluted net loss per share for the three and nine months ended September 30, 2018, because the effect of their inclusion would have been anti-dilutive. For periods in which we have a net loss and no instruments are determined to be dilutive, such as the three and nine months ended September 30, 2019 and 2018, basic and diluted net loss per share are the same.

Net Loss Per Share

9 Months Ended

Sep. 30, 2019

10. Net Loss Per Share

Basic net loss per share allocable to common stockholders is calculated by dividing the net loss allocable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net loss per share allocable to common stockholders is computed by dividing the net loss allocable to common stockholders by the weighted-average number of common shares outstanding during the period and giving effect to all potentially dilutive common shares using the treasury-stock method. For purposes of this calculation, outstanding options, stock awards, warrants and Series B Convertible Preferred Stock are considered to be potentially dilutive common shares and are only included in the calculation of diluted net loss per share allocable to common stockholders when their effect is dilutive.

As of September 30, 2019, stock options and stock awards, Series B Convertible Preferred Stock (on an as converted to common stock basis) and warrants (as exercisable into common stock), totaling approximately 10,065,000, 4,840,000 and 5,841,250 shares of common stock, respectively were excluded from the calculation of diluted net loss per share for the three and nine months ended September 30, 2019, because the effect of their inclusion would have been anti-dilutive. As of September 30, 2018, stock options and stock awards, totaling approximately 12,892,000 shares of common stock were excluded from the calculation of diluted net loss per share for the three and nine months ended September 30, 2018, because the effect of their inclusion would have been anti-dilutive. For periods in which we have a net loss and no instruments are determined to be dilutive, such as the three and nine months ended September 30, 2019 and 2018, basic and diluted net loss per share are the same.