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Earnings Per Share | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings (Loss) Per ShareThe following is a summary of Lexicon’s earnings (loss) per share calculations and reconciliations of basic to diluted earnings (loss) per share.
(in thousands, except per share data) |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 82,603 |  |  | $ | 226,086 |  |  | $ | (53,079) |  |  | $ | 181,271 |
Add interest on Convertible Notes |  | 1,258 |  |  | 1,277 |  |  | — |  |  | 3,790 |
Adjusted net income (loss) |  | $ | 83,861 |  |  | $ | 227,363 |  |  | $ | (53,079) |  |  | $ | 185,061 |
Denominator: |  |  |  |  |  |  |  |
Shares used in computing net income (loss) per common share, basic |  | 107,309 |  |  | 106,272 |  |  | 106,974 |  |  | 106,200 |
Add effect of potential dilutive securities: |  |  |  |  |  |  |  |
Share based compensation awards |  | 51 |  |  | 3 |  |  | — |  |  | 177 |
Convertible Notes |  | 10,192 |  |  | 10,365 |  |  | — |  |  | 10,365 |
Shares used in computing net income (loss) per common share, diluted |  | 117,552 |  |  | 116,640 |  |  | 106,974 |  |  | 116,742 |
Net income (loss) per share - basic |  | $ | 0.77 |  |  | $ | 2.13 |  |  | $ | (0.50) |  |  | $ | 1.71 |
Net income (loss) per share - diluted |  | $ | 0.71 |  |  | $ | 1.95 |  |  | $ | (0.50) |  |  | $ | 1.59 |
For periods presented with a net loss, the weighted average number of shares outstanding are the same for both basic and diluted net loss per common share. The average number of shares associated with stock options and restricted stock units that were excluded from diluted earnings per share that would potentially dilute earnings per share in the future was 11,773 and 10,576, respectively, for the three months ended September 30, 2020 and 2019, and 11,859 and 8,452, respectively, for the nine months ended September 30, 2020 and 2019. For periods presented with a net loss, the shares associated with the Convertible Notes are not included in the computation of diluted earnings per share because they are antidilutive.

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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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