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Loss Per Share (Tables) | 3 Months Ended
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Mar. 28, 2021
Earnings Per Share [Abstract] |
Summary of Loss Per Share Calculation | The following table summarizes the loss per share calculation:
|  | For the 13 Weeks Ended |
|  | March 28, |  |  | March 29, |
|  | 2021 |  |  | 2020 |
Net loss attributable to Potbelly Corporation |  | $ | (14,472 | ) |  | $ | (13,336 | )
Weighted average common shares outstanding-basic |  |  | 25,944 |  |  |  | 23,646 |
Plus: Effect of potential stock options exercise |  |  | — |  |  |  | — |
Weighted average common shares outstanding-diluted |  |  | 25,944 |  |  |  | 23,646 |
Loss per share available to common stockholders-basic |  | $ | (0.56 | ) |  | $ | (0.56 | )
Loss per share available to common stockholders-diluted |  | $ | (0.56 | ) |  | $ | (0.56 | )
Potentially dilutive shares that are considered anti-dilutive: |  |  |  |  |  |  |  |
Common share options |  |  | 2,544 |  |  |  | 2,294 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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