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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 27, 2020
Quarterly Financial Information Disclosure [Abstract] |
Summary of Unaudited Quarterly Financial Data | The following table presents selected unaudited quarterly financial data for periods indicated (in thousands, except per share data):
|  | Fiscal Year 2020 |
|  | March 29 |  |  | June 28 |  |  | September 27 |  |  | December 27 |
Total revenues |  | $ | 87,590 |  |  | $ | 56,162 |  |  | $ | 72,663 |  |  | $ | 74,866 |
Loss from operations |  |  | (16,985 | ) |  |  | (21,887 | ) |  |  | (16,138 | ) |  |  | (16,122 | )
Net loss attributable to Potbelly Corporation |  |  | (13,336 | ) |  |  | (22,216 | ) |  |  | (13,412 | ) |  |  | (16,427 | )
Loss per share attributable to common stockholders-basic |  |  | (0.56 | ) |  |  | (0.93 | ) |  |  | (0.56 | ) |  |  | (0.68 | )
Loss per share attributable to common stockholders-diluted |  |  | (0.56 | ) |  |  | (0.93 | ) |  |  | (0.56 | ) |  |  | (0.68 | )
|  | Fiscal Year 2019 |
|  | March 31 |  |  | June 30 |  |  | September 29 |  |  | December 29 |
Total revenues |  | $ | 98,087 |  |  | $ | 105,630 |  |  | $ | 104,238 |  |  | $ | 101,752 |
Income (loss) from operations |  |  | (4,723 | ) |  |  | (1,468 | ) |  |  | (2,143 | ) |  |  | (862 | )
Loss attributable to Potbelly Corporation |  |  | (18,439 | ) |  |  | (1,866 | ) |  |  | (2,355 | ) |  |  | (1,332 | )
Loss per share attributable to common stockholders-basic |  |  | (0.76 | ) |  |  | (0.08 | ) |  |  | (0.10 | ) |  |  | (0.06 | )
Loss per share attributable to common stockholders-diluted |  |  | (0.76 | ) |  |  | (0.08 | ) |  |  | (0.10 | ) |  |  | (0.06 | )

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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