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Net loss per share | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Net loss per share | oss per share The following table presents the calculation of basic and diluted net loss per share:
| Three Months Ended March 31,
2020 |  | 2019
Numerator: |  |  |  |
Net loss | $ | (12.5 | ) |  | $ | (26.0 | )
Denominator: |  |  |
Weighted-average number of shares—basic | 52.0 |  |  | 51.2 |
Dilutive securities—equity awards | — |  |  | — |
Weighted-average number of shares—diluted | 52.0 |  |  | 51.2 |
Net loss per share - basic | $ | (0.24 | ) |  | $ | (0.51 | )
Net loss per share - diluted | $ | (0.24 | ) |  | $ | (0.51 | )
Basic earnings (loss) per share is computed by dividing net loss by the weighted average number of shares of common stock outstanding during the period. Diluted earnings (loss) per share is computed using the treasury method by dividing net loss by the weighted average number of shares of common stock outstanding during the period, adjusted for the potential dilutive effect of other securities if such securities were converted or exercised and are not anti-dilutive. For the three months ended March 31, 2020 and 2019, approximately 0.7 million and 3.1 million stock options are not considered in the diluted net loss per share calculation because the exercise price of these options is greater than the average per share closing price during the three month period and their effect would be anti-dilutive.

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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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