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Earnings per Share | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Earnings per Share | Earnings per Share The following weighted average shares and share equivalents were used to calculate basic and diluted earnings per share ("EPS") for the three and six months ended June 30, 2021 and 2020:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Weighted average number of shares outstanding used to calculate basic EPS |  | 3,623 |  |  | 3,682 |  |  | 3,648 |  |  | 3,673 |
Dilutive securities: |  |  |  |  |  |  |  |
Stock options and restricted share units |  | 274 |  |  | 179 |  |  | 269 |  |  | 208 |
Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS |  | 3,897 |  |  | 3,861 |  |  | 3,917 |  |  | 3,881 |
The following non-qualified stock options ("Options") issued under equity incentive plans were outstanding during the three and six months ended June 30, 2021 and 2020, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive.
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Anti-dilutive securities |  | 18 |  |  | 330 |  |  | 19 |  |  | 244 |

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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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