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Net Loss Per Share | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Net Loss Per Share |
1 3. | Net Loss Per Share
Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed by dividing the net loss 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 stock 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 when their effect is dilutive.
|  | Year Ended |
|  | December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (75,240 | ) |  | $ | (152,600 | ) |  | $ | (158,899 | )
Preferred stock deemed dividend |  |  | - |  |  |  | (3,267 | ) |  |  | - |
Net loss allocable to common stockholders, basic |  |  | (75,240 | ) |  |  | (155,867 | ) |  |  | (158,899 | )
Removal of change in fair value of warrant liability |  |  | (4,124 | ) |  |  | - |  |  |  | - |
Net loss allocable to common stockholders, diluted |  | $ | (79,364 | ) |  | $ | (155,867 | ) |  | $ | (158,899 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares used to compute net loss allocable to common stockholders per share, basic |  |  | 100,753 |  |  |  | 72,024 |  |  |  | 62,362 |
Effect of dilutive warrants |  |  | 751 |  |  |  | - |  |  |  | - |
Weighted average shares used to compute net loss allocable to common stockholders per share, diluted |  |  | 101,504 |  |  |  | 72,024 |  |  |  | 62,362 |
The following were excluded from the calculation of diluted net loss per share as the effect of their inclusion would have been anti-dilutive:
|  | December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Outstanding securities not included in diluted net loss per share calculation (in thousands): |  |  |  |  |  |  |  |  |  |  |  |
Stock options and stock awards |  |  | 10,299 |  |  |  | 9,789 |  |  |  | 7,344 |
Series B Convertible Preferred Stock (as converted to common stock) |  |  | 4,140 |  |  |  | 4,840 |  |  |  | - |
Warrants (as exercisable into common stock) |  |  | - |  |  |  | 5,841 |  |  |  | - |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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