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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 27, 2020
Earnings Per Share [Abstract]  
Summary of Earnings (Loss) Per Share Calculation

The following table summarizes the earnings (loss) per share calculation (in thousands):

 

 

 

Fiscal Year

 

 

 

2020

 

 

2019

 

 

2018

 

Net loss attributable to Potbelly Corporation

 

$

(65,391

)

 

$

(23,992

)

 

$

(8,878

)

Weighted average common shares outstanding-basic

 

 

23,899

 

 

 

23,850

 

 

 

25,173

 

Plus: Effect of potential stock options exercise

 

 

—

 

 

 

—

 

 

 

—

 

Weighted average common shares outstanding-diluted

 

 

23,899

 

 

 

23,850

 

 

 

25,173

 

Loss per share available to common stockholders-

basic

 

$

(2.74

)

 

$

(1.01

)

 

$

(0.35

)

Loss per share available to common stockholders-

diluted

 

$

(2.74

)

 

$

(1.01

)

 

$

(0.35

)

Potentially dilutive shares that are considered anti-dilutive:

 

 

 

 

 

 

 

 

 

 

 

 

Shares

 

 

2,754

 

 

 

2,334

 

 

 

2,499