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Net Loss Per Share | 3 Months Ended
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Mar. 31, 2021
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 period by the weighted average number of shares of common stock outstanding during the period. Diluted net loss per share is calculated in accordance with the treasury stock method for the outstanding stock options and restricted stock units and refle cts the potential dilution that would occur if securities or other con tracts to issue common stock were exercised or converted to common stock. The dilutive impact of the outstanding Notes and Bonds issued by the Company (discussed in Note 9) has been considered using the "if-converted" method. The calculation of diluted net loss per share requires that, to the extent the average market price of the underlying shares for the reporting period exceeds the exercise price of the options or other securities and the presumed exercise of such securities are dilutive to net loss per share for the period, an adjustment to the net loss used in the calculation is required to remove the change in fair value of such securities from the numerator for the period. Likewise, an adjustment to the denominator is required to reflect the related dilutive shares, if any. For the three months ended March 31, 2021 and 2020, basic and diluted net loss per share were the same, as the assumed exercise or settlement of stock options and restricted stock units and the potentially dilutive shares issuable upon conversion of the Notes and Bonds would have been 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, 2021 and 2020:
Common Stock Equivalents | 2021 |  | 2020 |  |
Options to purchase common stock | 10,826,472 |  |  | 9,615,986 |  |  |
Service-based restricted stock units | 2,610,130 |  |  | 2,667,710 |  |  |
Performance-based restricted stock units | 663,353 |  |  | — |  |  |
Convertible preferred stock | 3,309 |  |  | 8,456 |  |  |
Convertible notes | 3,049,980 |  |  | 14,585,653 |  |  |
August 2019 Bonds | — |  |  | 4,928,859 |  |  |
December 2019 Bonds | — |  |  | 1,009,450 |  |  |
Total | 17,153,244 |  |  | 32,816,114 |  |  |

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